DISCLAIMER -- THIS IS NOT AN EARTHQUAKE PREDICTION OR WARNING! The commentary provided with these map(s) is for INFORMATIONAL USE ONLY, and SHOULD NOT be construed as an earthquake prediction, warning, or advisory. Responsibility for such warnings rests with the Office of Emergency Services of the State of California. PLEASE REMEMBER -- THESE ARE PRELIMINARY DATA Releasing these summaries on a timely basis requires that the data, analysis, and interpretations presented are PRELIMINARY. Of necessity they can only reflect the views of the seismologists who prepared them, and DO NOT carry the endorsement of the U.S.G.S. Thus while every effort is made to ensure that the information is accurate, nothing contained in this report is to be construed as and earthquake prediction, warning, advisory, or official policy statement of any kind, of the U.S. Geological Survey, or the U.S. Government. FOR QUESTIONS CONCERNING THIS REPORT Send e-mail to michael@andreas.wr.usgs.gov DO NOT SEND EMAIL TO weekly@garlock.wr.usgs.gov It will not be read. Seismicity Report for Northern California, the Nation, and the World for the week of January 18 - 24, 1996 Stephen R. Walter U.S. Geological Survey 345 Middlefield Rd. MS-977, Menlo Park, CA 94025 Graphics by Quentin Lindh San Francisco Bay Area The past week was very quiet. During the seven-day period ending at midnight on Wednesday, January 24, 1996 the U.S. Geological Survey office in Menlo Park recorded only 10 earthquakes of magnitude one (M1) and greater within the San Francisco Bay area shown in Figure 1. Only one was as large as M2. This total compares to 18 earthquakes during the previous seven-day period (January 11 - 17), four of which were as large as M2.0. The lone M2 earthquake was a M2.9 Saturday afternoon that occurred along the creeping segment of the San Andreas fault about three miles southeast of San Juan Bautista (#1 in figure 1). Other activity on the San Andreas was limited to a M1.7 on the creeping segment, southeast of Saturday's event and three M1's along the Loma Prieta segment east of Santa Cruz. The Calaveras fault was equally quiet with just four M1 events, none larger than M1.3. One earthquake of note occurred in the North Bay area: a M1.9 that occurred Tuesday evening along the Rogers Creek fault about six miles northeast of Novato (#2/1). Northern & Central California Two areas in northern California that have not experienced earthquakes recently were active during the past week. The first was in the eastern Coast Range about 35 miles southwest of Red Bluff (#4/2). Three earthquakes, all of similar magnitude, occurred here last Friday morning. Though all were large enough to have been felt, none were reported, owing perhaps to the remoteness of the area. The most recent comparable activity here was a small cluster in May of last year that included one M3, one M4.2, and numerous M2 events. The second active area was about nine miles northwest of Lassen Peak, near the small community of Viola (#2/2). The activity consisted of a trio of M2's last Thursday night followed by another pair of M2's on Saturday afternoon. The last event on Saturday was the largest, a M2.8 that apparently went unfelt along with the others. The Viola area was the location of a similar cluster of small earthquakes in October, 1983. The Cape Mendocino area was a bit more active than in recent weeks with four M2+ events, the largest a M3.3 late Tuesday afternoon that was located nine miles northwest of Petrolia (#8/2). To the north a trio of M2's occurred early in the week south and east of Eureka (#3/2). Other activity of note in the north state: continued aftershocks in the Markleeville area, the largest a M3.0 (#1/2), a pair of M2's north of Lake Berryessa (#5/2), and a M2.7 in the northern Sierra NEvada about 16 miles northwest of Reno, NV (#7/2). Long Valley Caldera A trio of M2 earthquakes occurred beneath the southern rim of the caldera during the week (#1/3). All occurred within a 3-hour period last Saturday morning and were located just southwest of the airport. None were reported to have been felt. Activity in the Sierra Nevada block south of the caldera was limited to a pair of M2's, the first and largest a M2.8 Tuesday evening southwest of Mt. Morrison (#2/3). USA Seismicity (January 14 - 22) Data provided by the National Earthquake Information Center showed only one notable earthquake in the lower 48 states, outside of California, during the past week. This M3.4 temblor occurred Sunday morning along the western Cascade Range east of Seattle (#3/4). It was felt in the towns of Fall City and North Bend. A trio of M4's (or so) occurred along the Blanco Fracture zone off the coast of central Oregon, too distant to be felt onshore (#1/4). A pair of M3.1 events in southern California were felt locally in the Big Bear Lake and Yucca Valley areas (#2/4). Domestic earthquakes outside of the contiguous U.S. included a M4.3 along the Kenai Peninsula in southern Alaska that was felt strongly at Soldona (#1/5) and a M4.5 on the island of Hawaii that was felt at Waimea, Wikoloa, Glenwood, and Laupahoehoe (#4/5). The Planet Earth (January 14 - 22) Only two earthquakes on the planet were as large as M6: a Mb6.0 near the north coast of Paua New Guinea (#5/5) and a Ms6.0 in the south Sandwich Islands region (#6/5). Felt earthquakes include a Mb5.8 near the coast of Peru that was felt at Barranca Chimbote, and at Lima (#3/5) and a Mb4.8 on the Colombia-Equador border that was felt in the Quito, Ecuador area (#2/5). Table 1. Northern & Central California Seismicity (M>1.0) --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 96 JAN 18 859 44.91 37 2.95 121 29.11 4.44 9 .02 .3 .8 CYS 1.1 96 JAN 18 1054 55.66 38 42.20 119 39.83 8.21 22 2 .08 .8 4.6 WAK 2.6 96 JAN 19 236 39.39 37 38.06 118 56.47 9.27 10 .05 .5 .5 SMO 1.7 96 JAN 19 239 24.86 37 38.54 118 55.65 7.85 12 .14 .6 1.1 SMO 1.6 96 JAN 19 249 41.28 37 38.45 118 55.16 8.67 7 .08 .8 1.9 SMO 1.6 96 JAN 19 337 7.14 36 32.32 121 7.49 3.28 10 .03 .3 .8 PIN 2.0 96 JAN 19 358 59.51 40 32.58 121 39.48 10.72 12 .05 .4 .7 SHA 2.2 96 JAN 19 426 18.42 37 37.65 118 51.78 5.96 10 .10 .6 .9 SMO 1.5 96 JAN 19 459 26.25 40 32.60 121 39.46 10.56 14 3 .04 .4 .8 SHA 1.9 96 JAN 19 755 58.31 36 57.01 121 41.39 7.66 25 .14 .4 .7 SJB 1.6 96 JAN 19 841 12.35 40 32.62 121 39.32 10.65 16 2 .05 .3 .6 SHA 2.5 96 JAN 19 854 30.37 40 32.67 121 39.19 10.89 12 2 .05 .4 .8 SHA 1.9 96 JAN 19 925 26.21 40 32.72 121 39.06 11.08 15 .05 .3 .6 SHA 2.6 96 JAN 19 1041 35.76 40 42.57 124 10.33 23.57 13 2 .04 .5 .7 EUR 2.0 96 JAN 19 1110 25.86 40 32.52 121 39.35 10.46 11 .05 .4 .8 SHA 2.0 96 JAN 19 1653 3.39 39 48.19 122 41.08 12.03 8 .16 .8 .8 SAC 3.1 96 JAN 19 1655 30.47 39 48.71 122 42.80 3.98 21 .14 .4 7.2 SAC * 3.0 96 JAN 19 1843 10.58 39 49.90 122 39.00 11.42 29 .45 .8 1.3 SAC 2.9 96 JAN 20 130 8.52 36 34.81 121 11.37 7.34 16 .07 .3 .7 PIN 1.9 96 JAN 20 153 32.75 40 41.30 123 57.38 20.58 14 1 .07 .3 .3 EUR 2.8 96 JAN 20 227 55.00 38 42.39 119 39.34 0.77 45 1 .14 .5 2.8 WAK * 3.1 96 JAN 20 423 23.82 36 28.48 121 2.98 6.87 13 .03 .4 .8 BIT 1.5 96 JAN 20 528 37.16 36 49.04 121 24.45 5.28 21 .31 .7 1.3 HOL 1.3 96 JAN 20 652 22.50 40 36.11 123 53.79 21.91 10 .03 .4 .5 EUR 2.0 96 JAN 20 839 5.80 38 42.10 122 24.39 10.68 41 1 .29 .4 1.0 GVL 2.5 96 JAN 20 840 23.80 38 41.73 122 23.07 8.66 8 1 .23 1.5 4.3 GVL 1.2 96 JAN 20 1019 31.35 36 36.41 121 12.30 4.76 10 .04 .5 .8 PIN 1.1 96 JAN 20 1022 1.09 36 29.83 121 4.43 3.47 19 .07 .3 .5 BIT 2.3 96 JAN 20 1025 12.03 36 29.88 121 4.36 3.80 9 .04 .4 .6 BIT 1.3 96 JAN 20 1122 41.68 39 38.35 120 5.23 11.36 23 1 .16 1.1 2.3 WAK 2.8 96 JAN 20 1145 11.25 36 50.09 121 24.57 7.85 17 .07 .3 .6 HOL 1.2 96 JAN 20 1522 38.21 37 37.12 118 52.30 9.04 30 2 .07 .3 .4 SMO 2.6 96 JAN 20 1605 9.28 36 33.73 121 9.11 3.12 9 .05 .4 .7 PIN 1.7 96 JAN 20 1816 5.78 37 37.11 118 52.37 9.27 29 1 .08 .3 .5 SMO 2.9 96 JAN 20 1831 8.74 37 37.06 118 52.54 8.88 16 .08 .4 .6 SMO 2.3 96 JAN 20 1845 51.94 37 36.65 118 52.49 9.73 12 .08 .6 .6 SHE 1.6 96 JAN 20 1856 26.16 37 37.64 118 52.28 7.24 10 .11 .5 1.2 SMO 1.2 96 JAN 20 1924 25.53 37 37.53 118 52.31 8.47 10 .13 .8 1.2 SMO 1.7 96 JAN 20 1927 24.63 35 43.22 118 1.98 9.03 9 .06 .5 1.6 WWF 1.6 96 JAN 20 2016 58.87 40 32.66 121 39.12 11.34 13 1 .06 .3 .7 SHA 2.4 96 JAN 20 2029 35.95 40 32.65 121 39.29 10.79 16 .04 .3 .6 SHA 2.8 96 JAN 20 2047 46.90 35 43.62 118 3.92 9.20 9 .12 .5 2.0 WWF 1.8 96 JAN 20 2206 28.65 37 28.13 118 50.26 1.56 15 .05 .7 5.5 MOR 1.9 96 JAN 20 2244 46.64 38 49.85 122 49.07 0.02 8 .12 .8 1.7 GEY * 1.9 96 JAN 21 49 8.44 36 48.43 121 31.56 6.16 61 .19 .3 .5 SJB 2.9 --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 96 JAN 21 609 34.06 40 18.32 124 30.87 21.16 17 1 .10 1.6 .3 MEN 2.6 96 JAN 21 727 27.53 36 36.99 121 13.16 4.51 21 .04 .3 .8 PIN 1.9 96 JAN 21 831 58.15 36 8.81 120 1.35 0.12 30 1 .29 .6 1.5 COA * 2.2 96 JAN 21 1142 53.28 37 32.32 118 52.60 8.41 30 1 .07 .3 .7 MOR 2.9 96 JAN 21 1306 34.82 37 36.74 118 52.52 8.67 13 .07 .6 .5 SHE 1.6 96 JAN 21 1307 14.96 37 37.34 118 50.83 11.93 7 .06 1.9 2.6 SMO 1.1 96 JAN 21 1323 13.59 38 39.75 122 7.30 0.04 11 2 .46 1.3 4.7 SAC * 1.8 96 JAN 21 1326 16.34 36 36.96 121 13.09 4.23 31 .08 .3 .8 PIN 2.2 96 JAN 21 1329 23.27 38 39.44 122 7.43 0.04 9 1 .46 1.4 4.8 SAC * 1.7 96 JAN 21 1332 42.70 38 46.05 122 43.75 2.26 7 .04 .8 .4 GEY 1.8 96 JAN 21 1630 4.73 37 32.34 118 49.26 1.18 12 .06 .3 .8 MOR 1.8 96 JAN 21 2311 2.35 36 39.26 121 16.72 6.74 19 .04 .3 .8 STN 1.9 96 JAN 22 400 34.76 36 15.84 120 20.59 5.85 40 2 .12 .4 1.2 COA 2.3 96 JAN 22 544 46.90 37 19.12 121 40.29 1.77 8 .03 .3 1.3 SFL 1.1 96 JAN 22 942 57.89 38 47.59 122 48.16 2.97 7 .02 .4 3.3 GEY 1.8 96 JAN 22 1008 9.45 38 42.66 122 23.59 5.33 27 1 .26 .4 1.5 GVL 2.0 96 JAN 22 1147 47.78 37 3.14 121 48.54 5.53 10 .03 .3 .5 LOM 1.1 96 JAN 22 1453 11.16 37 35.63 118 50.53 4.71 9 .10 .7 .6 MOR 1.5 96 JAN 22 1535 11.65 36 33.99 121 9.51 3.82 8 .06 .5 .8 PIN 1.3 96 JAN 22 2013 18.97 37 26.23 118 49.79 11.50 12 .15 .9 1.7 MOR 1.4 96 JAN 22 2244 59.88 36 35.27 121 11.05 4.71 9 .04 .4 .7 PIN 1.4 96 JAN 22 2349 1.69 38 42.17 119 39.16 0.04 19 .08 .7 1.2 WAK * 2.5 96 JAN 23 117 24.11 37 35.83 118 29.27 9.61 9 .05 .5 1.0 CHV 1.8 96 JAN 23 501 45.67 36 39.22 121 16.79 6.71 14 .03 .3 1.1 STN 1.9 96 JAN 23 612 56.96 36 3.48 120 35.82 4.15 11 1 .05 .6 .6 SLA 1.4 96 JAN 23 1527 58.75 37 12.85 119 51.18 22.85 12 4 .20 .6 .5 KAI 2.3 96 JAN 23 1952 12.53 36 26.65 121 0.93 5.12 12 .05 .5 .7 BIT 1.6 96 JAN 24 140 58.87 40 23.17 124 26.22 17.47 18 1 .06 .5 .2 MEN 3.3 96 JAN 24 408 51.51 37 26.28 118 49.35 5.02 31 1 .08 .3 1.2 MOR 2.1 96 JAN 24 413 13.14 38 9.37 122 28.31 11.52 36 1 .17 .3 .7 ROG 1.9 96 JAN 24 537 24.31 38 48.24 122 48.14 1.84 13 .03 .2 .4 GEY 2.2 96 JAN 24 545 58.30 38 48.10 122 48.20 2.13 7 .01 .3 .5 GEY 1.6 96 JAN 24 716 54.27 40 21.60 124 17.47 22.11 12 1 .08 .6 .5 MEN 2.7 96 JAN 24 910 5.38 36 44.44 121 26.97 3.81 24 .18 .4 1.4 SJB 1.7 96 JAN 24 1206 18.59 38 50.12 122 52.49 3.49 7 .04 .9 2.2 GEY 1.3 96 JAN 24 1306 7.27 38 46.50 122 45.49 3.44 8 .11 .6 1.1 GEY 1.7 96 JAN 24 1309 17.72 36 6.64 121 37.45 5.58 14 .06 .4 .8 SUR 1.5 96 JAN 24 1312 51.11 36 41.98 120 50.78 3.14 32 .10 .3 2.7 ORT 1.9 96 JAN 24 1424 35.02 38 46.42 122 45.30 3.78 8 .07 .5 .9 GEY 1.8 96 JAN 24 1943 4.58 38 49.93 122 52.65 2.54 12 .13 .4 1.3 GEY 1.6 96 JAN 24 2020 28.10 36 34.77 121 10.35 2.08 48 .08 .2 .3 PIN 3.0 96 JAN 24 2207 43.74 38 50.40 122 49.10 3.85 10 .13 .4 1.3 GEY 1.7 96 JAN 24 2215 28.72 38 50.64 122 49.32 2.18 12 .06 .3 .7 GEY 1.9 96 JAN 24 2223 18.51 36 26.61 121 1.17 4.97 34 .07 .3 .5 BIT 2.5 96 JAN 25 27 33.22 38 47.44 122 45.45 0.69 8 .06 .4 .9 GEY 1.8 --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 96 JAN 25 137 38.34 40 24.04 124 15.62 22.86 9 .07 1.3 1.2 MEN 2.3 96 JAN 25 338 46.74 37 6.52 121 50.55 4.00 10 .03 .4 .6 LOM 1.4 96 JAN 25 656 54.48 38 47.65 122 44.44 4.62 7 .04 .8 1.9 GEY 1.6 96 JAN 25 709 11.01 38 47.89 122 44.51 1.71 7 .03 .3 1.0 GEY 1.7 TABLE 2. Data from National Earthquake Information Center (NEIC) UTC TIME LAT LONG DEP GS MAGS SD STA REGION AND COMMENTS HRMNSEC MB Msz USED ------------------------------------------------------------------------------ JAN 14 002854.2* 41.228N 140.160E 59* 4.2 1.1 20 HOKKAIDO, JAPAN REGION 014030.4& 58.920N 153.900W 100 2.9 90 KODIAK ISLAND REGION. . 063230.0* 38.603N 72.241E 33N 4.7 4.0 0.7 20 TAJIKISTAN 121915.2 43.553N 0.619W 10G 1.2 33 PYRENEES. ML 3.9 (LDG). mbLg 3.6 122259.7 43.525N 0.585W 10G 3.6 1.2 34 PYRENEES. ML 3.9 (LDG). mbLg 3.4 133727.2* 14.028N 118.922E 33N 4.7 0.6 9 PHILIPPINE ISLANDS REGION 143006.4* 18.254N 145.734E 33N 4.4 1.2 37 MARIANA ISLANDS 171152.6 43.516N 0.600W 10G 1.3 39 PYRENEES. ML 3.9 (LDG). mbLg 3.4 181500.7& 60.060N 153.090W 123 3.1 18 SOUTHERN ALASKA. . 202546.7 43.187N 146.252E 33N 4.2 0.8 26 KURIL ISLANDS 223640.0* 8.868N 126.341E 102? 4.3 1.3 24 MINDANAO, PHILIPPINE ISLANDS 224748.0* 51.455N 168.202W 40D 4.0 0.7 21 FOX ISLANDS, ALEUTIAN ISLANDS JAN 15 013014.9* 53.922N 159.585E 33N 4.1 1.4 19 NEAR EAST COAST OF KAMCHATKA 021928.1% 33.882S 71.480W 50G 0.3 10 NEAR COAST-CENTRAL CHILE. MD 3.1 035712.8& 60.180N 153.100W 128 3.1 37 SOUTHERN ALASKA. . 061509.4 53.037N 83.799E 33N 4.6 0.9 37 SOUTHWESTERN SIBERIA, RUSSIA 094543.3* 0.493N 126.263E 33N 4.6 1.3 14 NORTHERN MOLUCCA SEA 115840.8& 65.290N 150.360W 14 32 NORTHERN ALASKA. . ML 3.8 191959.1& 63.230N 150.610W 132 43 CENTRAL ALASKA. . 203736.2% 11.606N 85.339W 33N 4.0 1.0 7 NICARAGUA JAN 16 004358.0& 60.467N 151.083W 46 4.3 133 KENAI PENINSULA, ALASKA. . Felt strongly at Soldona. Also felt at Kasilof and Kenai. 070021.4 46.905N 7.428E 10G 1.3 8 SWITZERLAND. ML 3.1 (LDG). 094413.9* 43.920N 15.598E 10G 1.6 37 ADRIATIC SEA. ML 4.5 (LDG), 4.0 (ROM). 100347.4* 44.189N 15.257E 10G 1.5 27 NORTHWEST BALKAN REGION. ML 3.9 132716.8* 37.273N 138.234E 18* 0.4 6 NEAR WEST COAST OF HONSHU, JAPAN 220140.1 44.973N 9.063E 10G 0.6 12 NORTHERN ITALY. ML 2.7 (LDG). 220311.7& 61.925N 132.743W 0G 6 SOUTHERN YUKON TERRITORY, CANADA. . ML 3.9 (PGC). Felt strongly at Ross River. JAN 17 021655.8 44.085N 126.885W 10G 4.1 1.1 17 OFF COAST OF OREGON 052118.6? 35.70 N 140.18 E 33N 0.1 6 NEAR EAST COAST OF HONSHU, JAPAN 074000.0& 59.880N 152.030W 63 86 SOUTHERN ALASKA. . 075825.3 44.283N 128.302W 10G 3.9 0.8 17 OFF COAST OF OREGON 082547.0 44.075N 128.481W 10G 4.0 0.8 24 OFF COAST OF OREGON 082759.4* 43.642N 28.745W 33N 4.8 4.2 0.7 12 NORTHERN MID-ATLANTIC RIDGE 194602.7 0.007N 78.850W 33N 4.8 1.0 24 COLOMBIA-ECUADOR BORDER REGION. Felt in the Quito, Ecuador area. 211358.2 56.104N 152.309W 33N 4.9 0.9 68 KODIAK ISLAND REGION. ML 3.7 230952.8 34.205N 116.852W 5G 1.3 36 SOUTHERN CALIFORNIA. ML 3.1 Felt. JAN 18 011248.5 63.349N 151.472W 33N 2.8 0.7 43 CENTRAL ALASKA. ML 3.1 (GS), 3.8 030644.2 22.325S 171.213E 33N 5.1 5.2 1.1 67 LOYALTY ISLANDS REGION 043458.9 53.005N 35.204W 33N 3.8 1.0 22 NORTH ATLANTIC OCEAN 093904.0 0.798S 122.263E 54* 4.9 1.6 32 MINAHASSA PENINSULA, SULAWESI 102332.7? 43.13 N 127.67 W 10G 0.3 25 OFF COAST OF OREGON 150147.2* 46.437N 150.608E 33N 3.7 1.4 15 KURIL ISLANDS 160935.7 46.500N 150.467E 33N 4.2 1.0 33 KURIL ISLANDS 163243.9* 46.373N 150.855E 33N 3.8 1.0 14 KURIL ISLANDS 165426.3 46.451N 150.647E 23D 4.0 1.0 27 KURIL ISLANDS 171326.0* 3.097N 126.673E 52? 4.3 1.3 16 TALAUD ISLANDS, INDONESIA 172545.0 46.510N 150.609E 17? 3.9 0.8 23 KURIL ISLANDS 192046.1& 60.420N 152.100W 71 46 SOUTHERN ALASKA. . 200205.8 58.219S 158.020E 10G 5.1 0.7 27 MACQUARIE ISLANDS REGION 201229.0% 33.160S 70.845W 15G 0.2 7 CHILE-ARGENTINA BORDER. MD 3.0 201244.2% 33.869S 70.619W 100G 1.4 10 CHILE-ARGENTINA BORDER. MD 2.6 211433.6* 10.270N 56.711E 10G 4.7 1.1 42 CARLSBERG RIDGE 211644.7 63.195N 150.634W 134 3.7 0.8 53 CENTRAL ALASKA 230039.9* 18.544S 65.220E 33N 4.8 1.0 28 MAURITIUS-REUNION REGION JAN 19 020459.2 44.221N 149.426E 33N 4.5 1.1 42 KURIL ISLANDS 155734.2* 8.470N 127.494E 33N 4.9 1.1 13 PHILIPPINE ISLANDS REGION 190158.9 10.374S 78.834W 36D 5.8 5.0 0.9 84 NEAR COAST OF PERU. Felt (V) at Barranca, (IV) at Chimbote and (II) at Lima. 200441.5% 33.319S 72.157W 10G 0.4 10 OFF COAST-CENTRAL CHILE. MD 3.5 200918.7% 33.195S 70.339W 5G 0.3 7 CHILE-ARGENTINA BORDER. MD 3.3 204509.5? 54.52 N 159.28 E 192D 5.0 1.1 36 NEAR EAST COAST OF KAMCHATKA JAN 20 022142.6% 33.109S 70.071W 10G 0.2 10 CHILE-ARGENTINA BORDER. MD 2.9 035409.4* 26.732S 177.231W 54D 5.2 0.8 32 SOUTH OF FIJI ISLANDS 071638.1* 51.335N 179.881W 33N 5.0 1.1 53 ANDREANOF ISLANDS, ALEUTIAN IS. 084304.9* 3.300S 151.845E 300G 5.0 0.5 28 NEW IRELAND REGION, P.N.G. 090841.1* 27.314S 66.831W 154D 4.7 1.0 23 CATAMARCA PROVINCE, ARGENTINA 181606.2 37.610N 118.844W 5G 1.1 33 CALIFORNIA-NEVADA BORDER. ML 2.8 JAN 21 004908.2 36.787N 121.507W 5G 0.6 33 CENTRAL CALIFORNIA 120116.9 34.119N 116.398W 5G 1.2 28 SOUTHERN CALIFORNIA. ML 3.1 160632.1 47.459N 121.715W 24 0.4 9 WASHINGTON. ML 3.4 (GS), MD 3.3 (SEA). Felt at Falls City and North Bend. 210901.7& 19.834N 155.492W 26 19 HAWAII. . MD 4.5 (HVO). Felt at Glenwood, Laupahoehoe, Mauna Loa Estates, Waikoloa and Waimea. JAN 22 001024.3 44.561N 148.074E 33N 5.3 0.6 46 KURIL ISLANDS 085953.7 2.805S 141.281E 33N 6.0 5.4 0.7 29 NEAR N COAST OF NEW GUINEA, PNG. 131455.8* 40.129N 142.119E 33N 5.1 4.7 0.9 32 NEAR EAST COAST OF HONSHU, JAPAN 153300.4* 18.864N 104.146W 33N 4.1 1.0 21 NEAR COAST OF JALISCO, MEXICO 232000.3* 60.582S 25.964W 33N 5.7 6.0 0.9 11 SOUTH SANDWICH ISLANDS REGION Note: Computer users can get faster access to the Weekly Seismicity Reports in any of three ways: 1. World-Wide-Web (WWW) access: http://quake.wr.usgs.gov 2. Anonymous FTP access: quake.wr.usgs.gov (in pub/www/QUAKES/WEEKREPS) 3. Email Access: (send email to michael@andreas.wr.usgs.gov) Notes for Table 1: Origin time in the list is in GMT, in the text and on maps it is in local time. N RD: is the number of readings used to locate the event. N S: is the number of S waves in N RD. RMS SEC: is the root mean squared residual misfit for the location is seconds, the lower the better, over 0.3 to 0.5 seconds is getting bad, but this is machine, not hand timed, data. ERH: is the estimated horizontal error in kilometers. ERZ: is the estimated vertical error in kilometers. N FM: is the number of readings used to compute the magnitude. REMKS: obtuse region codes that denote the velocity model used to locate the event. DUR MAG: is the magnitude as determined from the duration of the seismograms, not the amplitude. Sort of like going to echo canyon and measuring how loud your yell is by counting echos. FIG: denotes the figure/event number in the maps posted separately.