EARTHQUAKES IN ALASKA July 2006 ALASKA EARTHQUAKE INFORMATION CENTER

Transcription

1 EARTHQUAKES IN ALASKA July 2006 ALASKA EARTHQUAKE INFORMATION CENTER A report of the Alaska State Seismologist s Office

2 Alaska Earthquake Information Center Geophysical Institute, University of Alaska 903 Koyukuk Drive, P.O. Box Fairbanks, AK TEL: (907) ; FAX: (907) EARTHQUAKES IN ALASKA - July 2006 By N. Ruppert with the assistance of N. Kozyreva, A. Martirosyan, and J. Roush Issued: October, 2006 The Alaska Earthquake Information Center is a cooperative program between the Geophysical Institute of the University of Alaska and the U.S. Geological Survey with the support from the Earthquake Hazards Program. DISCLAIMER This report has not been edited or reviewed for conformity with U. S. Geological Survey and State of Alaska standards and nomenclature. The data in this report are preliminary and subject to revision. Most of the earthquake parameters have been determined by AEIC. The data are released on the condition that neither the U.S. Geological Survey, nor the United States Government, nor the Geophysical Institute, University of Alaska Fairbanks may be held liable for any damages resulting from its authorized or unauthorized use. Alaska State Seismologist s Report

3 The Alaska Earthquake Information Center (AEIC) is a cooperative program established to monitor earthquakes in Alaska and to provide earthquake information to citizens and public officials and to the earth science community. Most of the earthquakes located by AEIC occur in a core area in central and southern Alaska, between latitudes 57 o N and 67 o N, and longitudes 135 o W and 156 o W; however, this listing also includes earthquakes not located by AEIC but reported in the National Earthquake Information Center s (NEIC) monthly Preliminary Determination of Epicenters (PDE) for a larger region between latitudes 48 o N and 75 o N, and longitudes 130 o W to 170 o E. The magnitude level for completeness and the precision of the locations vary across the state due to uneven station spacing and to differences in earthquake depths. The data are more complete and the hypocenters are more accurate in regions where the station density is greatest. In southern and central Alaska where the majority of the stations are located, the earthquake catalogs are complete for shallow (depth < 30 km) earthquakes of about magnitude 1.5 and larger. The magnitude threshold at which the catalogs are complete increases with depth. For earthquakes deeper than 100 km in southern and central Alaska, the catalogs are complete above about magnitude 2.0. The earthquake catalogs are reasonably complete for the entire state for events greater than or equal to magnitude 3.0. Earthquakes in southern and central Alaska, where calculated hypocenters are more accurate, have horizontal (epicentral) and vertical (depth) errors (median value) of 1.1 and 1.9 km, respectively. Neogene and younger faults plotted on the seismicity figures are modified from: Plafker, G., Gilpin, L., and Lahr, J.C., 1994, Neotectonic map of Alaska, in Plafker, G., and Berg, H.C., eds., The geology of Alaska: Boulder, Colorado, Geological Society of America, The Geology of North America, v. G-1, plate 12, scale 1:2,500,000. The seismicity shown for western Canada is not complete, and does not represent the total activity for the area. For more information on Canadian seismicity, contact: Pacific Geoscience Center, Geological Survey of Canada, P.O. Box 6000 Sidney, British Columbia, V8L 4B2 Canada. Cover A new earthquake monitoring station on Table Mtn. in Wrangell-St. Elias National Park. Photo by N. Ruppert, Alaska Earthquake Information Center, GI UAF. Acknowledgments Supplemental data provided by the United States Geological Survey, National Earthquake Information Center, Golden, Colorado; the Geological Survey of Canada, Pacific Geoscience Centre, Sidney, British Columbia; the Alaska Volcano Observatory, Anchorage, Alaska; and the National Oceanic and Atmospheric Administration, National Weather Service, Alaska Tsunami Warning Center, Palmer, Alaska.

4 CONTENTS This monthly earthquake catalog contains the following: Highlights: Summary plot: Maps and cross-sections: Listings: A discussion of important or particularly interesting earthquakes which occurred during the month. A plot with the earthquake statistics: time-magnitude plot, number of located events per day, cumulative number of located events, depth histogram, frequency-magnitude relationship for the Aleutian and mainland Alaska events. Five maps illustrating Alaska seismicity during the month. Figure 1 is a map which includes all located earthquakes for the state and surrounding region. Figure 2a focuses on earthquakes in a core area of central and southern Alaska, and depicts line segments for two cross-sections through the Alaska/ Aleutian Wadati Benioff zone (Figure 2b). Figure 3 shows events in the core area larger than magnitude 3.0, Figure 4 shows all core events shallower than 30 km depth, and Figure 5 shows all core events of depth greater than or equal to 30 km. Three listings of hypocenters are presented, as follows: first, a complete listing of all located earthquakes for the month, corresponding to the epicenters plotted in Figure 1; next, Appendix 1 contains a subset of the full listing restricted to only those events of magnitude 4.0 and larger; and lastly, Appendix 2 lists known or suspected quarry blasts during the month. These blasts have been excluded from Figures 1-5. Listings include, for each event: date and origin time, epicenter, depth, preferred magnitude, solution quality statistics and comments (region, alternate magnitudes, available felt reports and other remarks). Other types of information available regularly from AEIC: Parameters for the most recent 100 earthquakes of magnitude 2.0 and larger are available through the Internet ( OR by sending to quake@giseis.alaska.edu; in the latter case a return message will contain the earthquake listing. Weekly and Monthly Seismicity Reports - issued within seven days of the end of each week and month, respectively. These reports include highlights of recent activity, a preliminary listing of events, and epicenter maps. The weekly and monthly reports may be found on the Internet at Catalog of Alaska Earthquake Focal Mechanisms - annual catalogs of focal mechanisms determined from initial P-wave polarities recorded by the regional seismograph network, as well as source mechanisms determined independently by NEIC and other seismic observatories. 1

5 HIGHLIGHTS During July, 2006, the Alaska Earthquake Information Center located 1,984 events, sixty nine of which had magnitudes equal to or greater than 4.0 and fifteen were suspected quarry blasts. The largest event was on July 8in the Andreanof Islands region of Aleutian Islands (M6.6). Eleven events were felt. Earthquakes of particular interest during the month are discussed below: July 8, 20:40:01 UTC (12:40 pm ADT), M W 6.6 (M L 6.4, m b 6.3, M S 6.3), o N o W, depth=19.6 km: A strong earthquake occurred in the Andreanof Islands region of the Aleutian Islands (larger red star on the map). This event was situated 138kilometers (86 miles) ESE of Amchitka and 204 km (128miles) WSW of Adak. This earthquake is the largest to occur in this region since the magnitude 6.8event on June 14, 2005 (smaller white star on the map). The July 8th event was preceded by a series of moderate foreshocks that started on July 1st. The strongest foreshocks (M ) occurred on July 1st at 11:34 am ADT, and on July 2nd at 8:57 am and 9:20 am ADT. The AEIC located over 250 aftershocks of the M6.6 event within the first week after the mainshock and over 500 events total between July 1st and 31st in the source region of the M6.6 earthquake (crosses). There were eight aftershocks with magnitudes greater than 5.0 through the end of July. The largest aftershock (M5.5) occurred on July 8at 8:16 pm ADT (July 9, 4:16 am UTC). The July 2006 earthquake sequence occurred in the area separating the rupture zones of the 1965 M8.7 Rat Islands earthquake to the west and the 1957 M8.6 Andreanof Islands earthquake to the east. The westernmost area of the 1957 fault zone was reruptured repeatedly in the 1986 M8.0 and 1996 M7.9 earthquakes. The eastern portion of the 1965 fault zone was reruptured recently in the M7.7 earthquake on November 17, The June 2005 sequence of earthquakes was located east of the 2003 rupture zone, at the easternmost end of the 1965 rupture zone. All these events ruptured the boundary between the subducting Pacific and overriding North American plates (approximate extent of the rupture zones is shown in red for the 1957 and 1965 events, and in black for smaller events). The Aleutian megathrust, where the two plates are being forced directly into one another, is one of the world s most active seismic zones. Over one hundred earthquakes of magnitude seven or larger have occurred along this boundary in the past hundred years, or one magnitude 7+ earthquake every year or two. 2

6 SUMMARY PLOT A summary plot of events with magnitudes. The lower left panel shows number of the located events per day, their magnitudes, and the cumulative number. The upper left panel is the depth histogram. The right panel shows the frequency-magnitude distribution of the Aleutian Islands (upper figure) and the mainland Alaska (lower figure) earthquakes with estimates of the b-value and magnitude of completeness. 2006/7/1 2006/7/31: 1978 earthquakes Aleutian Islands, b (M>1.9)= / # of events Depth in [km] Cumulative Number Cumulative # Magnitude Mainland Alaska, b (M > 1.4) = / # per day Magnitude day Cumulative Number Magnitude 3

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13 Monthly Listing of Earthquake Hypocenters in Alaska Events are listed in chronological order. The following data are given for each event: 1. DATE AND TIME in Coordinated Universal Time (UTC): year (YR), month (MO), day (DY), hour (HR), minute (MN) and second (SEC). To convert to Alaska Standard Time (AST) or Alaska Daylight Time (ADT) subtract 9 or 8 hours, respectively. 2. LATITUDE and LONGITUDE of epicenter in degrees (DEG) and minutes (MIN). 3. DEPTH, depth of focus in kilometers. Symbols after the depth indicate the following: N = Depth was fixed at 33 km for earthquakes whose character on seismograms indicates a shallow focus but whose depth is not satisfactorily determined by the data. D = Depth was restrained by the computer program based on 2 or more compatible pp phases and/or unidentified secondary arrivals used as pp. G = Depth was fixed at other than 33 km. * or? = Less well-constrained free depth determined by NEIC. For detailed explanation see January 1993 Preliminary Determation of Epicenters. 4. PREF MAG, the AEIC ML is the preferred magnitude, unless it is unavailable or when the National Earthquake Information Center (NEIC) m b > 4.5 or M S > 6.8. For preferred magnitudes other than AEIC ML a letter code after the magnitude indicates the type as follows: mb = Body-wave magnitude (Mb) computed by NEIS. Ms = Surface wave magnitude (MS) computed by NEIS. A = Local magnitude (ML) from Alaska Tsunami Warning Center, Palmer, Alaska (PMR). C = Local magnitude (ML) from Pacific Geoscience Centre, Sidney, British Columbia, Canada (PGC). D = Duration magnitude (MD) from AEIC. L = Duration magnitude (MD) from Columbia University, Lamont-Doherty Earth Observatory, Palisades, New York (PAL). 5. RMS, root-mean-square traveltime residual in seconds: RMS = W i R i 2 Where R i is the observed minus computed time of the i-th observation. W i is the corresponding weight of the observation, and weights are normalized so that their sum equals N, the total number of P, S, and S-P observations used in the solution. 6. SEH, standard error in the horizontal direction with least control in kilometers. 7. SEZ, standard error of depth in kilometers. 8. GAP, largest azimuthal separation between stations in degrees with respect to the epicenter. 9. PHASES, number of P and S phases used in the solution. 10. MIN DIS, epicentral distance in kilometers to the station closest to the epicenter. 11. Q, quality of the hypocenter. This index is a measure of the precision of the hypocenter and is calculated from SEH and SEZ: Q Larger of SEH and SEZ (km) A < 1.34 B < 2.67 C < 5.35 D > T, event type as follows: E - Local or regional tectonic earthquake located by AEIC. a - Volcano-tectonic earthquake located by AEIC. B - Long period volcano earthquake located by AEIC. R - Regional event not located by AEIC. Q - Known or suspected quarry or mine blast located by AEIC. 13. COMMENTS, symbols and abbreviations used in comments: BRK - University of California, Berkeley. Mo - Seismic moment. NEIS - U.S. Geological Survey, National Earthquake Information Service. PAL - Columbia University, Lamont-Doherty Earth Observatory, Palisades, New York. PAS - California Institute of Technology, Pasadena. PGC - Pacific Geoscience Centre, Sidney, British Columbia, Canada. PMR - Alaska Tsunami Warning Center, Palmer, Alaska. PPT - Laboratoire de Geophysique, Papeete, French Polynesia. SPEC - An NEIS solution based on use of dense local networks, a local crustal model, or other methods not routinely applied in calculating the hypocenter parameters. Errors and uncertainties in the reported parameters may result from random errors present in the phase data, or from systematic errors introduced either by the velocity models used to locate the earthquakes or by poor geometrical distribution of recording stations about the source. One should be particularly cautious using solutions that have GAP > 180 degrees, PHASES < 6, MIN DIS > DEPTH, RMS > 1s, SEH > 5km, or SEZ > 10km. Solutions with A and B quality are generally more reliable, but this does not guarantee that the accuracy of the solutions is within the limits implied by SEH and SEZ. Catalogs prior to January 1998 have printed SEH and SEZ values that are too large by a factor of N i N 10

14 AEIC Monthly Earthquake Listing DATE LAT LON DEPTH MAG RMS SEH SEZ GAP PHASES MIN Q T REGION yy mo dy jday hh:mn:sec DEG DEG km mb ML sec. km km deg P,S DIS (182) 01:04: D E RAT ISLANDS, ALEUTIAN IS (182) 02:28: C E RAT ISLANDS, ALEUTIAN IS (182) 02:46: B E ALASKA PENINSULA (182) 03:07: D E RAT ISLANDS, ALEUTIAN IS (182) 03:23: D E RAT ISLANDS, ALEUTIAN IS (182) 04:23: C E RAT ISLANDS, ALEUTIAN IS (182) 04:54: C E RAT ISLANDS, ALEUTIAN IS (182) 05:50: A E CENTRAL ALASKA (182) 06:23: A E FOX ISLANDS, ALEUTIAN IS (182) 06:41: D E FOX ISLANDS, ALEUTIAN IS (182) 06:51: A E KENAI PENINSULA, ALASKA (182) 07:16: D E RAT ISLANDS, ALEUTIAN IS (182) 07:22: C E RAT ISLANDS, ALEUTIAN IS (182) 07:23: B E SOUTHERN ALASKA (182) 07:53: B E KENAI PENINSULA, ALASKA (182) 07:54: A E CENTRAL ALASKA (182) 08:41: D E RAT ISLANDS, ALEUTIAN IS (182) 09:01: D E SOUTHEASTERN ALASKA (182) 09:14: D E ALASKA PENINSULA (182) 09:14: C E RAT ISLANDS, ALEUTIAN IS (182) 09:49: C E SOUTHERN ALASKA (182) 10:12: D E RAT ISLANDS, ALEUTIAN IS (182) 10:32: C E RAT ISLANDS, ALEUTIAN IS (182) 10:35: C E SOUTHERN ALASKA (182) 10:46: D E FOX ISLANDS, ALEUTIAN IS (182) 10:57: D E RAT ISLANDS, ALEUTIAN IS (182) 11:12: A E SOUTHERN ALASKA (182) 11:29: C E SOUTHERN ALASKA (182) 11:38: D E RAT ISLANDS, ALEUTIAN IS (182) 12:01: G B E CENTRAL ALASKA (182) 12:08: D E FOX ISLANDS, ALEUTIAN IS (182) 12:15: C E RAT ISLANDS, ALEUTIAN IS (182) 13:12: C F ANDREANOF IS., ALEUTIAN IS. Felt at Adak (182) 13:43: D E RAT ISLANDS, ALEUTIAN IS (182) 14:37: A E SOUTHERN ALASKA (182) 14:43: D E UNIMAK ISLAND REGION (182) 15:04: G A G SOUTHERN ALASKA (182) 15:55: C E RAT ISLANDS, ALEUTIAN IS (182) 16:38: D E RAT ISLANDS, ALEUTIAN IS (182) 16:48: C E RAT ISLANDS, ALEUTIAN IS (182) 16:51: D E SOUTHEASTERN ALASKA (182) 17:15: A E ANDREANOF IS., ALEUTIAN IS (182) 17:53: D E RAT ISLANDS, ALEUTIAN IS (182) 18:17: C E ALASKA PENINSULA (182) 18:19: B E KENAI PENINSULA, ALASKA (182) 19:23: C E UNIMAK ISLAND REGION (182) 19:31: N/A D E RAT ISLANDS, ALEUTIAN IS (182) 19:31: D E FOX ISLANDS, ALEUTIAN IS (182) 19:34: B E ANDREANOF IS., ALEUTIAN IS (182) 19:38: D E ANDREANOF IS., ALEUTIAN IS (182) 19:40: D E RAT ISLANDS, ALEUTIAN IS (182) 19:42: D E ANDREANOF IS., ALEUTIAN IS (182) 19:44: C E ANDREANOF IS., ALEUTIAN IS (182) 19:48: A E ANDREANOF IS., ALEUTIAN IS (182) 20:03: B E ANDREANOF IS., ALEUTIAN IS (182) 20:06: D E ANDREANOF IS., ALEUTIAN IS (182) 20:10: B E ANDREANOF IS., ALEUTIAN IS (182) 20:12: C E ANDREANOF IS., ALEUTIAN IS (182) 20:13: C E RAT ISLANDS, ALEUTIAN IS (182) 20:16: A E ANDREANOF IS., ALEUTIAN IS. 11

15 (182) 20:20: C E RAT ISLANDS, ALEUTIAN IS (182) 20:27: C E RAT ISLANDS, ALEUTIAN IS (182) 20:30: G A G SOUTHERN ALASKA (182) 20:35: D E ANDREANOF IS., ALEUTIAN IS (182) 20:36: C E ANDREANOF IS., ALEUTIAN IS (182) 20:38: C E ANDREANOF IS., ALEUTIAN IS (182) 20:42: A E ANDREANOF IS., ALEUTIAN IS (182) 20:46: B E ANDREANOF IS., ALEUTIAN IS (182) 20:49: C E ANDREANOF IS., ALEUTIAN IS (182) 20:49: C E ANDREANOF IS., ALEUTIAN IS (182) 20:57: D E FOX ISLANDS, ALEUTIAN IS (182) 21:00: A E CENTRAL ALASKA (182) 21:03: C E ANDREANOF IS., ALEUTIAN IS (182) 21:14: A E ANDREANOF IS., ALEUTIAN IS (182) 21:15: B E ANDREANOF IS., ALEUTIAN IS (182) 21:16: C E ANDREANOF IS., ALEUTIAN IS (182) 21:19: C E ANDREANOF IS., ALEUTIAN IS (182) 21:21: C E ANDREANOF IS., ALEUTIAN IS (182) 21:23: C E ANDREANOF IS., ALEUTIAN IS (182) 21:25: B E ANDREANOF IS., ALEUTIAN IS (182) 21:27: B E ANDREANOF IS., ALEUTIAN IS (182) 21:36: C E ANDREANOF IS., ALEUTIAN IS (182) 21:39: B E ANDREANOF IS., ALEUTIAN IS (182) 21:43: D E RAT ISLANDS, ALEUTIAN IS (182) 21:46: B E ANDREANOF IS., ALEUTIAN IS (182) 21:48: C E ANDREANOF IS., ALEUTIAN IS (182) 21:50: A E ANDREANOF IS., ALEUTIAN IS (182) 21:52: B E ANDREANOF IS., ALEUTIAN IS (182) 21:53: B E ANDREANOF IS., ALEUTIAN IS (182) 21:56: D E ANDREANOF IS., ALEUTIAN IS (182) 21:59: A E CENTRAL ALASKA (182) 22:01: C E ANDREANOF IS., ALEUTIAN IS (182) 22:01: C E ANDREANOF IS., ALEUTIAN IS (182) 22:05: C E ANDREANOF IS., ALEUTIAN IS (182) 22:05: B E ANDREANOF IS., ALEUTIAN IS (182) 22:13: B E ANDREANOF IS., ALEUTIAN IS (182) 22:36: C E ANDREANOF IS., ALEUTIAN IS (182) 22:39: C E ANDREANOF IS., ALEUTIAN IS (182) 22:50: C E ANDREANOF IS., ALEUTIAN IS (182) 22:54: A E ANDREANOF IS., ALEUTIAN IS (182) 22:57: B E ANDREANOF IS., ALEUTIAN IS (182) 23:09: B E ANDREANOF IS., ALEUTIAN IS (182) 23:10: C E ANDREANOF IS., ALEUTIAN IS (182) 23:15: B E ANDREANOF IS., ALEUTIAN IS (182) 23:16: C E ANDREANOF IS., ALEUTIAN IS (182) 23:20: C E RAT ISLANDS, ALEUTIAN IS (182) 23:24: B E ANDREANOF IS., ALEUTIAN IS (182) 23:34: C E ANDREANOF IS., ALEUTIAN IS (182) 23:34: D E RAT ISLANDS, ALEUTIAN IS (182) 23:37: B E ANDREANOF IS., ALEUTIAN IS (182) 23:41: A E SOUTHERN ALASKA (182) 23:45: C E RAT ISLANDS, ALEUTIAN IS (182) 23:46: B E ANDREANOF IS., ALEUTIAN IS (183) 00:03: D E ANDREANOF IS., ALEUTIAN IS (183) 00:06: B E ANDREANOF IS., ALEUTIAN IS (183) 00:08: D E ANDREANOF IS., ALEUTIAN IS (183) 00:18: A E SOUTHERN ALASKA (183) 00:20: D E ANDREANOF IS., ALEUTIAN IS (183) 00:21: D E ANDREANOF IS., ALEUTIAN IS (183) 00:32: D E ANDREANOF IS., ALEUTIAN IS (183) 00:45: A E SOUTHERN ALASKA (183) 01:03: D E ANDREANOF IS., ALEUTIAN IS (183) 01:26: A E CENTRAL ALASKA (183) 01:32: B E ANDREANOF IS., ALEUTIAN IS (183) 01:36: D E ANDREANOF IS., ALEUTIAN IS (183) 01:37: C E ANDREANOF IS., ALEUTIAN IS (183) 01:46: D E SOUTHERN ALASKA 12

16 (183) 02:06: C E ANDREANOF IS., ALEUTIAN IS (183) 02:13: A E ANDREANOF IS., ALEUTIAN IS (183) 02:19: D E ANDREANOF IS., ALEUTIAN IS (183) 02:26: A E CENTRAL ALASKA (183) 02:37: C E ANDREANOF IS., ALEUTIAN IS (183) 02:47: B E CENTRAL ALASKA (183) 03:06: A E CENTRAL ALASKA (183) 03:08: B E ANDREANOF IS., ALEUTIAN IS (183) 03:10: A E FOX ISLANDS, ALEUTIAN IS (183) 03:15: B E ANDREANOF IS., ALEUTIAN IS (183) 03:16: B E KODIAK ISLAND REGION (183) 03:33: D E ANDREANOF IS., ALEUTIAN IS (183) 03:53: C E RAT ISLANDS, ALEUTIAN IS (183) 04:01: C E RAT ISLANDS, ALEUTIAN IS (183) 04:04: D E RAT ISLANDS, ALEUTIAN IS (183) 04:04: A E CENTRAL ALASKA (183) 04:06: C E RAT ISLANDS, ALEUTIAN IS (183) 04:10: C E RAT ISLANDS, ALEUTIAN IS (183) 04:28: C E RAT ISLANDS, ALEUTIAN IS (183) 04:31: D E RAT ISLANDS, ALEUTIAN IS (183) 04:32: D E RAT ISLANDS, ALEUTIAN IS (183) 04:38: C E ANDREANOF IS., ALEUTIAN IS (183) 04:51: D E RAT ISLANDS, ALEUTIAN IS (183) 04:51: A E KENAI PENINSULA, ALASKA (183) 04:53: D E RAT ISLANDS, ALEUTIAN IS (183) 05:11: D E RAT ISLANDS, ALEUTIAN IS (183) 05:19: D E RAT ISLANDS, ALEUTIAN IS (183) 06:04: A E KODIAK ISLAND REGION (183) 06:28: A E CENTRAL ALASKA (183) 07:27: D E ANDREANOF IS., ALEUTIAN IS (183) 07:29: A E SOUTHERN ALASKA (183) 07:41: C E ALASKA PENINSULA (183) 07:44: A E CENTRAL ALASKA (183) 08:05: D E RAT ISLANDS, ALEUTIAN IS (183) 08:15: C E RAT ISLANDS, ALEUTIAN IS (183) 08:17: C E ANDREANOF IS., ALEUTIAN IS (183) 08:20: D E ANDREANOF IS., ALEUTIAN IS (183) 08:32: D E RAT ISLANDS, ALEUTIAN IS (183) 08:43: C E RAT ISLANDS, ALEUTIAN IS (183) 08:51: A E CENTRAL ALASKA (183) 09:14: D E ANDREANOF IS., ALEUTIAN IS (183) 09:28: D E RAT ISLANDS, ALEUTIAN IS (183) 09:46: B E GULF OF ALASKA (183) 09:52: B E ANDREANOF IS., ALEUTIAN IS (183) 10:05: A E SOUTHERN ALASKA (183) 10:35: C E RAT ISLANDS, ALEUTIAN IS (183) 10:37: A E SOUTHERN ALASKA (183) 10:59: D E RAT ISLANDS, ALEUTIAN IS (183) 11:10: D E ANDREANOF IS., ALEUTIAN IS (183) 11:11: A E CENTRAL ALASKA (183) 11:15: D E RAT ISLANDS, ALEUTIAN IS (183) 11:24: A E SOUTHERN ALASKA (183) 11:37: A E ANDREANOF IS., ALEUTIAN IS (183) 12:08: B E ANDREANOF IS., ALEUTIAN IS (183) 12:12: B E ANDREANOF IS., ALEUTIAN IS (183) 12:18: G B E ANDREANOF IS., ALEUTIAN IS (183) 12:20: D E ANDREANOF IS., ALEUTIAN IS (183) 12:29: B E ANDREANOF IS., ALEUTIAN IS (183) 12:31: G B G SOUTHERN ALASKA (183) 12:32: B E ANDREANOF IS., ALEUTIAN IS (183) 12:34: A E SOUTHERN ALASKA (183) 12:38: C E ANDREANOF IS., ALEUTIAN IS (183) 12:42: B E ANDREANOF IS., ALEUTIAN IS (183) 12:44: B E ANDREANOF IS., ALEUTIAN IS (183) 12:57: B E ANDREANOF IS., ALEUTIAN IS (183) 13:04: A E KODIAK ISLAND REGION (183) 13:05: C E ANDREANOF IS., ALEUTIAN IS (183) 13:06: A E SOUTHERN ALASKA 13

17 (183) 13:07: C E ANDREANOF IS., ALEUTIAN IS (183) 13:10: D E ANDREANOF IS., ALEUTIAN IS (183) 13:11: B E ANDREANOF IS., ALEUTIAN IS (183) 13:29: D E RAT ISLANDS, ALEUTIAN IS (183) 13:35: D E ANDREANOF IS., ALEUTIAN IS (183) 13:45: C E ALASKA (183) 13:47: C E ANDREANOF IS., ALEUTIAN IS (183) 13:53: A E SOUTHERN ALASKA (183) 13:57: G B E ANDREANOF IS., ALEUTIAN IS (183) 14:08: D E RAT ISLANDS, ALEUTIAN IS (183) 14:12: D E RAT ISLANDS, ALEUTIAN IS (183) 14:26: D E RAT ISLANDS, ALEUTIAN IS (183) 14:28: C E RAT ISLANDS, ALEUTIAN IS (183) 14:34: C E ANDREANOF IS., ALEUTIAN IS (183) 14:39: A E ANDREANOF IS., ALEUTIAN IS (183) 14:49: D E ANDREANOF IS., ALEUTIAN IS (183) 14:50: C E SOUTHEASTERN ALASKA (183) 14:52: B E ANDREANOF IS., ALEUTIAN IS (183) 15:07: B E ANDREANOF IS., ALEUTIAN IS (183) 15:10: G D E RAT ISLANDS, ALEUTIAN IS (183) 15:13: A E CENTRAL ALASKA (183) 15:13: C E RAT ISLANDS, ALEUTIAN IS (183) 15:28: D E ANDREANOF IS., ALEUTIAN IS (183) 15:31: C E RAT ISLANDS, ALEUTIAN IS (183) 15:55: A E KENAI PENINSULA, ALASKA (183) 15:59: C E ANDREANOF IS., ALEUTIAN IS (183) 16:01: G A E CENTRAL ALASKA (183) 16:24: A E SOUTHERN ALASKA (183) 16:27: A E SOUTHERN ALASKA (183) 16:39: A E CENTRAL ALASKA (183) 16:57: C E ANDREANOF IS., ALEUTIAN IS (183) 17:00: C E ANDREANOF IS., ALEUTIAN IS (183) 17:01: C E ANDREANOF IS., ALEUTIAN IS (183) 17:04: C E ANDREANOF IS., ALEUTIAN IS (183) 17:05: D E ANDREANOF IS., ALEUTIAN IS (183) 17:06: C E ANDREANOF IS., ALEUTIAN IS (183) 17:07: C E ANDREANOF IS., ALEUTIAN IS (183) 17:08: C E ANDREANOF IS., ALEUTIAN IS (183) 17:10: C E ANDREANOF IS., ALEUTIAN IS (183) 17:16: B E ANDREANOF IS., ALEUTIAN IS (183) 17:18: B E ANDREANOF IS., ALEUTIAN IS (183) 17:20: B E ANDREANOF IS., ALEUTIAN IS (183) 17:24: C E ANDREANOF IS., ALEUTIAN IS (183) 17:27: B E ANDREANOF IS., ALEUTIAN IS (183) 17:27: C E ANDREANOF IS., ALEUTIAN IS (183) 17:28: C E ANDREANOF IS., ALEUTIAN IS (183) 17:30: C E ANDREANOF IS., ALEUTIAN IS (183) 17:32: B E ANDREANOF IS., ALEUTIAN IS (183) 17:34: D E ANDREANOF IS., ALEUTIAN IS (183) 17:35: C E ANDREANOF IS., ALEUTIAN IS (183) 17:37: D E ANDREANOF IS., ALEUTIAN IS (183) 17:39: B E ANDREANOF IS., ALEUTIAN IS (183) 17:40: B E ANDREANOF IS., ALEUTIAN IS (183) 17:43: C E ANDREANOF IS., ALEUTIAN IS (183) 17:44: C E ANDREANOF IS., ALEUTIAN IS (183) 17:45: A E ANDREANOF IS., ALEUTIAN IS (183) 17:47: C E ANDREANOF IS., ALEUTIAN IS (183) 17:48: B E ANDREANOF IS., ALEUTIAN IS (183) 17:51: C E ANDREANOF IS., ALEUTIAN IS (183) 17:53: D E ANDREANOF IS., ALEUTIAN IS (183) 18:00: B E ANDREANOF IS., ALEUTIAN IS (183) 18:02: D E ANDREANOF IS., ALEUTIAN IS (183) 18:04: D E ANDREANOF IS., ALEUTIAN IS (183) 18:05: C E ANDREANOF IS., ALEUTIAN IS (183) 18:10: A E ANDREANOF IS., ALEUTIAN IS (183) 18:14: B E ANDREANOF IS., ALEUTIAN IS (183) 18:18: D E ANDREANOF IS., ALEUTIAN IS. 14

18 (183) 18:18: B E ALASKA PENINSULA (183) 18:18: D E ANDREANOF IS., ALEUTIAN IS (183) 18:21: B E ANDREANOF IS., ALEUTIAN IS (183) 18:26: A E ANDREANOF IS., ALEUTIAN IS (183) 18:26: C E ANDREANOF IS., ALEUTIAN IS (183) 18:29: C E ANDREANOF IS., ALEUTIAN IS (183) 18:32: B E ANDREANOF IS., ALEUTIAN IS (183) 18:34: C E ANDREANOF IS., ALEUTIAN IS (183) 18:35: C E ANDREANOF IS., ALEUTIAN IS (183) 18:36: C E ANDREANOF IS., ALEUTIAN IS (183) 18:40: B E ANDREANOF IS., ALEUTIAN IS (183) 18:49: B E ANDREANOF IS., ALEUTIAN IS (183) 19:01: B E ANDREANOF IS., ALEUTIAN IS (183) 19:07: A E ANDREANOF IS., ALEUTIAN IS (183) 19:10: D E ANDREANOF IS., ALEUTIAN IS (183) 19:13: D E ANDREANOF IS., ALEUTIAN IS (183) 19:14: B E ANDREANOF IS., ALEUTIAN IS (183) 19:17: B E ANDREANOF IS., ALEUTIAN IS (183) 19:18: C E ANDREANOF IS., ALEUTIAN IS (183) 19:24: C E ANDREANOF IS., ALEUTIAN IS (183) 19:28: C E ANDREANOF IS., ALEUTIAN IS (183) 19:30: B E ANDREANOF IS., ALEUTIAN IS (183) 19:45: C E ANDREANOF IS., ALEUTIAN IS (183) 19:46: C E ANDREANOF IS., ALEUTIAN IS (183) 19:47: B E ANDREANOF IS., ALEUTIAN IS (183) 19:57: B E ANDREANOF IS., ALEUTIAN IS (183) 20:02: C E ANDREANOF IS., ALEUTIAN IS (183) 20:05: C E ANDREANOF IS., ALEUTIAN IS (183) 20:13: D E ANDREANOF IS., ALEUTIAN IS (183) 20:14: A E ANDREANOF IS., ALEUTIAN IS (183) 20:25: B E ANDREANOF IS., ALEUTIAN IS (183) 20:28: A E ANDREANOF IS., ALEUTIAN IS (183) 20:50: D E ANDREANOF IS., ALEUTIAN IS (183) 21:01: D E ANDREANOF IS., ALEUTIAN IS (183) 21:12: A E ANDREANOF IS., ALEUTIAN IS (183) 21:20: A E ANDREANOF IS., ALEUTIAN IS (183) 21:41: A E RAT ISLANDS, ALEUTIAN IS (183) 21:47: D E ANDREANOF IS., ALEUTIAN IS (183) 21:52: C E ANDREANOF IS., ALEUTIAN IS (183) 21:58: C E RAT ISLANDS, ALEUTIAN IS (183) 22:09: D E ANDREANOF IS., ALEUTIAN IS (183) 22:20: D E RAT ISLANDS, ALEUTIAN IS (183) 22:25: D E ANDREANOF IS., ALEUTIAN IS (183) 22:32: D E ANDREANOF IS., ALEUTIAN IS (183) 22:48: C E FOX ISLANDS, ALEUTIAN IS (183) 23:14: D E ANDREANOF IS., ALEUTIAN IS (183) 23:15: C E ALASKA (183) 23:24: B E ANDREANOF IS., ALEUTIAN IS (183) 23:29: D E ANDREANOF IS., ALEUTIAN IS (183) 23:29: D E RAT ISLANDS, ALEUTIAN IS (183) 23:32: C E ANDREANOF IS., ALEUTIAN IS (183) 23:38: D E UNIMAK ISLAND REGION (183) 23:42: B E ANDREANOF IS., ALEUTIAN IS (183) 23:45: B E ANDREANOF IS., ALEUTIAN IS (183) 23:47: C E ANDREANOF IS., ALEUTIAN IS (184) 00:07: D E ANDREANOF IS., ALEUTIAN IS (184) 00:18: B E SOUTHERN ALASKA (184) 00:33: D E ANDREANOF IS., ALEUTIAN IS (184) 00:38: D E ANDREANOF IS., ALEUTIAN IS (184) 00:50: D E ANDREANOF IS., ALEUTIAN IS (184) 00:50: D E ANDREANOF IS., ALEUTIAN IS (184) 01:01: D E RAT ISLANDS, ALEUTIAN IS (184) 01:04: D E ANDREANOF IS., ALEUTIAN IS (184) 02:00: B E ANDREANOF IS., ALEUTIAN IS (184) 02:00: D E KODIAK ISLAND REGION (184) 02:05: D E ANDREANOF IS., ALEUTIAN IS (184) 02:22: D E ANDREANOF IS., ALEUTIAN IS (184) 02:24: D E ANDREANOF IS., ALEUTIAN IS. 15