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 or reply to this message. Seismicity Report for Northern California, the Nation, and the World for the week of January 20 - 26, 1994 Data and text prepared by Steve Walter U.S. Geological Survey 345 Middlefield Rd. MS-977, Menlo Park, CA 94025 Graphics by Quentin Lindh San Francisco Bay Area For the second week in a row no earthquakes as large as M2.0 occurred in the Bay Area. For the seven-day period ending at midnight on Wednesday, January 26, 1994 the U.S. Geological Survey office in Menlo Park recorded 16 earthquakes of magnitude one (M1) and greater within the San Francisco Bay area shown in Figure 1. This total compares to 20 earthquakes during the previous seven-day period (Jan. 13 - 19), none of which were larger than M1.9. Northern & Central California Overall, seismicity remained low throughout most of the region. The largest earthquake was a M4.2 off Cape Mendocino, an area that otherwise saw only one other event as large as M2 (#1 in figure 2). The most recent earthquake of comparable size was a M4.2 in early August, 1993. To the south the Coast Range was quiet following last week's series of M2's along the Maacama fault. The only notable activity was a continuation of M2 events north of Lake Berryessa (#7/2), aftershocks to a M4.1 on Jan. 17th. The only activity south of the Bay Area occurred along the San Andreas. The creeping segment produced several M2 earthquakes during the week, the largest a M2.9 early Sunday morning about 3 miles northwest of San Benito (#6/2). Southeast of here, M2.0 earthquakes occurred both at the south end of the creeping segment and at the northern end of the Parkfield segment (#5/2). The only other activity of note were a trio of M2 earthquakes in northern California. Last Thursday a M2.6 occurred in the Basin and Range terrane of northeastern California, about 39 miles south-southwest of Alturas (#2/2). This is the largest earthquake recorded in this region in at least the past three years. The following day a M2.7 occurred in the Stephens Pass area east of Mt. Shasta (#3/2), an area that experienced several M4's during a swarm in August,1978. Finally, on Saturday afternoon, a M2.0 occurred just southeast of McCloud, a small town nestled near the southern base of Mt. Shasta (#4/2). Long Valley Caldera Activity remained fairly low in the caldera with only four earthquakes as large as M2. The largest of these was a M2.4 early Monday afternoon that was located about two miles southeast of Mammoth Lakes (#2/3). Somewhat surprisingly, this earthquake was reported to have been felt by some residents in the town. Activity was a bit higher south of the caldera with a M3.0 south of Mt. Morrison (#4/3), a M2.8 on the southern Hilton Creek fault (#5/3), and a pair of M2.9 earthquakes in the volcanic tableland nine miles northwest of Bishop (#6/3). USA Seismicity (January 18 - 25) Aftershocks to last week's M6.6 Northridge earthquake continue to roll through the San Fernando Valley north of Los Angeles. According to data provided by the National Earthquake Information Center the largest of this reporting period was a M5.0 early last Wednesday afternoon (#2/4). Over a dozen M4 aftershocks occurred during the week, the largest a M4.6 late last Friday morning. Seismologists from the Southern California Seismic Network have noted that although "the aftershock sequence is slightly more energetic than average, [it] is decaying slightly more quickly than average". They expect the sequence to produce about one more M5.0 or larger aftershock during the next 12 months. The probability of it occurring within the coming week is about 20% (1 in 5). Readers interested in obtaining additional information on the Northridge earthquake, call (818)395-6326 to request a copy of the Weekly Earthquake Report for Southern California. Other domestic quakes of note: a M4.5 on the Blanco Fracture Zone off the southern Oregon coast (#1/4); several aftershocks in the Klamath Falls area including a M4.1 last Wednesday afternoon (#3/4); a M3.3 in north-central Nebraska that was felt in many of the communities surrounding the epicenter (#4/4). According the NEIC, earthquakes have struck this general area of South Dakota and Nebraska in the past, sometimes causing minor damage. The most recent example was a M4.4 event in March, 1983 that caused some damage in the Fort Thompson-Stephan area east of Pierre, South Dakota. The Planet Earth (January 19 - 25) One major earthquake occurred during the past week, a Ms7.3 near Halmahera Island, the northernmost of the large Moluccas Islands in the central Indonesian archipelago (#3/5). The earthquake killed at least seven people, injured 50, and destroyed scores of buildings. Two other strong earthquakes also struck Indonesia during the week including a Ms6.9 in the Irian Jaya region (#1/5) and a Mb6.2 off the southern coast of southern Sumatera (#4/5). Other moderate earthquakes of note include a Mb5.8 beneath northern Peru (#2/5), a Mb5.1 beneath Ecuador (#5/5), and a Ms5.8 beneath the northern mid-Atlantic ridge (#6/5). 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 94 JAN 20 820 10.52 39 15.02 123 15.92 1.42 18 3 .11 .3 1.0 MAA 1.5 94 JAN 20 828 44.78 37 24.11 121 44.86 8.69 30 1 .05 .2 .4 ALU 1.1 94 JAN 20 1051 15.83 37 37.88 118 56.95 7.77 10 1 .08 .5 .9 SMO 1.0 94 JAN 20 1210 43.08 38 47.72 122 28.19 7.92 17 .21 .6 1.1 GVL- 1.4 94 JAN 20 1250 19.83 38 50.25 122 49.67 2.32 8 .02 .3 .8 GEY 1.1 94 JAN 20 1542 33.23 40 29.77 124 49.65 23.21 19 1 .16 2.010.1 MEN 4.2 94 JAN 20 1559 34.81 39 38.00 123 25.77 8.58 14 .09 .3 .9 MAA 1.5 94 JAN 20 1645 52.22 37 39.33 118 51.31 3.79 12 1 .14 .5 .9 DOM 1.4 94 JAN 20 1722 52.17 38 45.90 122 27.43 6.52 15 .20 .5 1.4 GVL 1.7 94 JAN 20 1844 59.14 37 38.59 118 55.30 8.83 8 .07 .7 2.2 SMO 1.1 94 JAN 20 1914 3.27 37 36.92 118 49.21 5.41 7 1 .06 .6 1.2 HCF 1.0 94 JAN 20 2131 55.60 37 37.22 118 57.54 7.53 11 .11 1.2 1.3 SMO 1.3 94 JAN 20 2256 47.51 40 45.53 122 18.64 4.04 7 .07 .7 8.4 SHA-Q 1.8 94 JAN 20 2311 50.78 37 38.23 118 58.48 8.86 25 .11 .4 .6 SMO 1.7 94 JAN 20 2343 23.43 36 28.03 121 2.37 7.79 11 1 .06 .4 .8 BIT .7 94 JAN 21 103 31.12 40 58.86 120 53.58 3.25 7 .05 2.0 6.8 MOD - 2.6 94 JAN 21 138 12.92 37 8.10 121 49.96 12.26 13 .06 .5 1.1 SCV .9 94 JAN 21 241 16.18 39 24.43 121 28.92 1.71 19 5 .16 .4 3.4 ORO- 1.6 94 JAN 21 315 23.01 38 47.49 122 45.99 2.70 20 .12 .3 .9 GEY 2.0 94 JAN 21 410 25.68 36 47.29 121 15.99 8.22 19 .04 .3 .6 PAI .9 94 JAN 21 554 48.41 37 38.38 118 58.63 7.94 27 .12 .4 .5 SMO 2.0 94 JAN 21 558 27.91 38 47.82 122 44.66 1.32 7 .03 .4 .7 GEY .9 94 JAN 21 835 42.18 38 34.78 122 40.12 5.81 8 .10 .6 1.9 NAP 1.4 94 JAN 21 840 36.05 37 37.63 118 51.12 8.85 17 2 .12 .4 .8 SMO 1.1 94 JAN 21 955 49.00 37 58.35 122 1.84 14.43 22 .17 .6 .9 CON 1.3 94 JAN 21 1020 7.91 37 38.50 118 55.30 9.28 9 1 .10 .7 1.6 SMO 1.2 94 JAN 21 1100 18.71 36 37.17 121 6.37 7.38 30 .13 .3 .7 BVL 1.3 94 JAN 21 1209 40.28 37 33.15 118 49.91 7.28 11 .08 .7 1.0 MOR .9 94 JAN 21 1227 8.23 37 37.42 118 51.20 7.17 23 .13 .4 .6 SMO 1.4 94 JAN 21 1230 55.53 37 38.48 118 49.51 11.76 7 .13 .9 2.9 HCF 1.0 94 JAN 21 1349 1.29 37 39.71 118 56.79 4.23 39 2 .16 .3 .4 SMO 2.4 94 JAN 21 1355 42.01 37 38.62 118 55.65 6.65 7 2 .03 .5 1.5 SMO 1.0 94 JAN 21 1511 6.55 37 37.60 118 51.29 8.73 12 2 .15 .5 1.1 SMO 1.1 94 JAN 21 1513 26.59 41 32.95 121 52.94 4.55 7 .15 1.014.6 MOD - 2.7 94 JAN 21 1522 15.31 37 39.73 118 56.87 3.28 8 1 .04 .4 .6 SMO 1.0 94 JAN 21 1646 56.46 37 29.64 118 50.63 10.59 39 2 .08 .3 .6 MOR 2.1 94 JAN 21 1654 23.12 37 29.74 118 50.56 10.24 35 3 .10 .3 .7 MOR 1.9 94 JAN 21 1733 3.71 37 29.76 118 50.50 9.66 23 .10 .4 .8 MOR 1.8 94 JAN 21 1937 23.90 38 48.93 122 50.22 1.36 7 .04 .4 .8 GEY 1.0 94 JAN 21 1938 17.83 38 45.82 122 27.42 6.29 26 2 .22 .4 1.1 GVL 1.8 94 JAN 21 2229 53.45 37 34.41 118 51.75 6.23 10 .09 .5 1.3 MOR 1.1 94 JAN 21 2300 28.19 37 38.03 118 56.24 6.15 12 .25 1.0 1.7 SMO 1.2 94 JAN 21 2318 11.01 38 48.55 122 45.37 1.76 7 .04 .3 .9 GEY 1.3 94 JAN 21 2326 4.74 38 48.10 122 27.77 7.78 24 .16 .4 .7 GVL 1.7 94 JAN 21 2334 59.08 38 50.91 122 48.57 1.60 7 .01 .4 1.1 GEY 1.1 --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 94 JAN 22 54 9.17 41 14.09 122 1.69 14.54 14 2 .16 .5 1.6 SHA 2.1 94 JAN 22 101 47.13 38 48.19 122 27.63 7.17 14 .15 .5 .7 GVL 1.4 94 JAN 22 108 1.07 40 20.99 124 23.86 12.34 12 1 .07 .8 .5 MEN 1.6 94 JAN 22 114 2.68 38 48.01 122 47.83 2.01 8 .03 .3 .5 GEY 1.2 94 JAN 22 146 21.99 37 38.57 118 55.97 5.45 20 .16 .5 .7 SMO 1.5 94 JAN 22 203 34.49 37 32.48 118 49.89 5.50 12 2 .09 .6 1.2 MOR 1.3 94 JAN 22 218 8.13 38 45.83 122 27.26 6.70 18 .18 .4 1.0 GVL 1.4 94 JAN 22 311 46.76 36 2.34 120 35.39 5.46 40 5 .11 .3 .4 SLA 2.1 94 JAN 22 617 49.02 38 47.26 122 46.45 2.36 8 .01 .3 .7 GEY 1.1 94 JAN 22 703 56.67 38 48.81 122 28.55 8.33 27 .21 .4 .8 GVL 1.9 94 JAN 22 713 55.87 38 49.13 122 28.79 8.81 13 .10 .4 .6 GVL 1.2 94 JAN 22 726 38.60 36 58.34 121 36.54 2.01 23 .19 .3 1.5 SAR 1.3 94 JAN 22 900 6.74 37 36.55 118 48.96 5.61 9 .14 .6 1.3 HCF 1.3 94 JAN 22 1024 59.98 37 30.93 118 52.34 9.04 12 1 .09 .7 1.2 MOR 1.2 94 JAN 22 1108 22.98 38 48.52 122 48.55 2.49 14 .07 .3 .5 GEY 1.5 94 JAN 22 1116 2.64 37 36.60 118 48.84 5.34 15 2 .13 .4 .8 HCF 1.6 94 JAN 22 1312 2.81 38 47.04 122 45.31 0.19 18 .11 .3 .9 GEY 1.9 94 JAN 22 1750 12.15 38 50.57 122 47.73 0.91 7 .06 .4 1.1 GEY 1.1 94 JAN 22 1757 36.02 37 37.95 118 57.44 6.22 10 .09 .9 .7 SMO 1.0 94 JAN 22 1902 4.50 37 37.48 119 2.15 5.17 20 .12 .5 .7 MAM 1.8 94 JAN 22 1922 33.60 36 28.91 121 3.52 6.77 9 .02 .4 1.3 BIT 1.3 94 JAN 22 1940 38.74 37 38.65 118 56.85 6.71 15 2 .08 .4 .7 SMO 1.5 94 JAN 22 2104 27.88 37 38.32 118 57.23 8.20 15 .18 .8 1.3 SMO 1.3 94 JAN 22 2216 49.84 37 40.49 118 57.11 2.82 16 .11 .4 .7 SMO 1.6 94 JAN 22 2226 7.31 37 7.74 121 58.43 11.09 15 .09 .4 1.1 LOM 1.1 94 JAN 23 131 38.30 38 52.53 122 49.23 0.63 10 .03 .3 1.0 GEY 1.3 94 JAN 23 306 12.59 38 49.63 122 48.84 0.28 8 .08 .4 1.1 GEY 1.1 94 JAN 23 715 50.34 38 49.31 122 47.65 5.13 31 1 .12 .3 .5 GEY 2.3 94 JAN 23 756 22.39 41 31.87 121 52.52 12.50 9 .23 1.6 3.5 MOD 2.0 94 JAN 23 928 14.36 36 32.71 121 7.57 5.36 73 .13 .2 .6 PIN 2.9 94 JAN 23 1034 35.13 37 37.79 118 58.25 10.04 7 .06 .8 2.1 SMO 1.1 94 JAN 23 1051 39.27 36 10.98 120 44.59 3.03 11 .06 .4 1.2 BIT 1.7 94 JAN 23 1316 23.37 37 38.13 118 57.24 7.70 27 .14 .4 .6 SMO 2.3 94 JAN 23 1317 49.17 38 31.05 122 45.83 0.12 7 .06 .4 1.5 ROG * 1.6 94 JAN 23 1333 52.16 38 48.27 122 49.07 1.37 9 .05 .3 .6 GEY 1.4 94 JAN 23 1403 11.12 37 36.11 118 49.05 4.90 9 .08 .5 1.2 HCF 1.3 94 JAN 23 1427 51.21 37 36.39 118 49.20 5.82 18 .13 .4 .7 HCF 1.9 94 JAN 23 1440 9.21 37 32.41 118 27.72 10.33 10 .09 .6 1.3 CHV 1.6 94 JAN 23 1514 29.06 38 32.89 122 45.75 5.91 10 .10 .5 1.0 ROG 1.4 94 JAN 23 1518 35.36 37 36.95 118 51.07 6.08 9 .13 .7 1.2 SMO 1.0 94 JAN 23 1530 24.07 36 40.70 121 18.18 3.77 12 .05 .3 .7 STN 1.6 94 JAN 23 1649 52.89 37 36.66 118 49.01 5.82 8 .14 .6 1.4 HCF 1.4 94 JAN 23 1652 14.71 38 50.26 122 49.02 4.00 23 .13 .3 .9 GEY 2.2 94 JAN 23 1851 50.40 37 36.37 118 49.32 5.57 22 .09 .3 .6 HCF 2.0 94 JAN 23 1904 8.15 37 36.46 118 49.06 4.83 20 .12 .4 .9 HCF 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 94 JAN 23 2029 47.60 40 18.51 124 28.25 7.78 14 .02 .9 .3 MEN 2.9 94 JAN 23 2052 35.36 37 38.07 118 56.06 10.35 8 1 .08 .9 1.5 SMO 1.4 94 JAN 23 2110 24.35 37 40.31 118 56.70 3.15 11 .13 .5 .8 SMO 1.0 94 JAN 23 2209 8.13 38 47.89 122 28.36 4.61 10 .10 .4 2.1 GVL 1.8 94 JAN 24 22 59.59 36 0.72 120 34.07 5.34 13 1 .09 .5 .7 SLA 1.7 94 JAN 24 314 40.47 37 42.24 122 1.21 8.50 19 .16 .5 .7 DAN 1.4 94 JAN 24 714 3.59 38 49.28 122 46.31 3.45 22 .12 .3 .8 GEY 2.1 94 JAN 24 721 14.97 38 49.16 122 46.30 2.22 17 .13 .3 1.2 GEY 2.1 94 JAN 24 721 43.12 38 49.20 122 46.53 2.15 9 .07 .3 .6 GEY 1.8 94 JAN 24 800 28.40 37 36.44 118 49.05 5.57 17 .13 .4 .8 HCF 1.7 94 JAN 24 924 33.98 37 40.89 118 51.05 5.53 7 .06 1.1 1.4 DOM 1.1 94 JAN 24 925 48.62 38 46.06 122 27.59 7.51 30 .18 .3 1.6 GVL 2.6 94 JAN 24 930 9.71 37 35.25 118 54.23 6.18 8 .16 1.8 1.1 SIL 1.0 94 JAN 24 1145 55.47 36 41.66 121 19.37 5.35 9 .12 .6 1.1 STN 1.2 94 JAN 24 1219 31.46 37 34.14 118 51.22 8.26 21 1 .12 .3 .6 MOR 1.6 94 JAN 24 1338 0.06 37 38.52 118 57.89 6.03 7 .03 .5 1.1 SMO 1.2 94 JAN 24 1404 18.68 37 36.61 118 48.85 5.56 13 1 .15 .5 .9 HCF 1.6 94 JAN 24 1449 56.70 37 38.53 118 52.71 10.28 10 .09 .8 1.5 SMO 1.0 94 JAN 24 1634 10.53 37 33.99 121 41.71 6.76 14 .06 .3 .6 HAM 1.5 94 JAN 24 1833 26.00 38 47.01 122 45.03 1.55 16 .13 .3 1.1 GEY 2.1 94 JAN 24 1940 24.70 37 35.49 118 51.66 6.62 8 1 .06 .5 1.1 MOR 1.5 94 JAN 24 2011 10.95 37 18.07 121 40.19 3.60 22 .15 .4 .8 SFL 1.6 94 JAN 24 2045 56.81 36 32.51 121 7.62 5.90 13 .03 .3 2.1 PIN 1.8 94 JAN 24 2057 14.17 37 38.27 118 56.09 8.68 28 .14 .4 .6 SMO 2.4 94 JAN 24 2124 45.35 37 35.58 118 49.57 7.53 8 1 .08 .6 1.4 MOR 1.0 94 JAN 24 2318 42.16 37 36.59 118 48.99 5.37 15 .11 .4 .9 HCF 1.6 94 JAN 24 2342 35.13 38 47.82 122 47.10 0.44 8 .06 .3 .8 GEY 1.3 94 JAN 24 2358 5.90 37 36.80 118 49.10 6.20 10 .15 .6 1.4 HCF 1.4 94 JAN 25 102 24.03 37 34.48 118 50.30 7.66 15 1 .15 .5 1.0 MOR 1.6 94 JAN 25 712 16.88 36 52.16 121 20.13 5.39 38 .14 .3 .6 QUI 1.9 94 JAN 25 739 3.14 37 25.06 121 41.22 6.23 22 .09 .3 1.0 ALU 1.6 94 JAN 25 841 33.67 37 40.63 118 51.60 4.97 9 1 .10 .8 1.6 DOM 1.4 94 JAN 25 1101 37.29 35 59.13 120 30.17 11.98 22 .07 .3 .5 MID 2.0 94 JAN 25 1739 48.32 38 50.17 122 49.62 2.36 12 .03 .2 .6 GEY 1.4 94 JAN 25 1812 2.08 36 34.35 121 9.91 6.57 9 .03 .3 2.1 PIN 1.5 94 JAN 25 1816 42.73 38 48.33 122 46.69 1.91 12 .06 .3 .5 GEY 1.6 94 JAN 25 1903 4.83 37 32.92 118 51.07 10.36 32 .10 .3 .6 MOR 3.0 94 JAN 25 2029 45.71 38 47.25 122 45.48 0.00 10 .13 .4 1.3 GEY * 1.6 94 JAN 25 2037 26.89 38 47.82 122 45.97 0.82 7 .02 .3 .8 GEY 1.1 94 JAN 25 2057 37.48 38 48.92 122 48.45 4.78 21 .12 .3 .7 GEY 2.4 94 JAN 25 2129 37.02 38 49.01 122 48.54 3.56 8 .05 .4 .8 GEY 1.4 94 JAN 25 2336 0.12 38 50.38 122 47.45 0.10 7 1 .07 .4 1.5 GEY * 1.0 94 JAN 26 336 2.55 36 34.54 121 9.74 4.02 32 .13 .3 1.3 PIN 2.4 94 JAN 26 340 51.35 38 50.91 122 50.13 1.25 7 .11 .8 1.8 GEY 1.0 94 JAN 26 933 47.02 36 35.31 121 6.92 7.54 30 .14 .3 1.1 BVL 1.9 --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 94 JAN 26 1125 24.21 38 45.97 122 27.68 6.42 21 .22 .5 1.4 GVL 1.8 94 JAN 26 1444 0.78 37 30.64 118 45.41 6.82 27 1 .12 .4 .7 WCN 2.8 94 JAN 26 1451 58.46 37 33.55 118 50.57 8.90 10 1 .12 .7 1.4 MOR 1.4 94 JAN 26 1632 6.97 38 49.27 122 47.44 0.68 8 .08 .3 .9 GEY 1.1 94 JAN 26 1906 14.26 37 26.08 118 32.42 12.44 27 .10 .4 1.0 CHA 2.9 94 JAN 26 1915 2.64 37 26.13 118 32.34 12.49 27 .08 .3 .8 CHA 2.9 94 JAN 26 2121 1.80 37 36.42 118 49.01 6.25 10 1 .13 .6 1.1 HCF 1.2 94 JAN 26 2155 1.06 36 37.09 121 13.00 4.53 38 .10 .2 .6 PIN 2.1 94 JAN 26 2156 18.27 37 6.38 121 51.83 5.01 41 .11 .2 .4 LOM 1.9 94 JAN 26 2221 2.09 37 38.17 118 57.03 7.04 11 1 .15 .7 1.2 SMO 1.2 94 JAN 26 2240 3.59 37 38.69 118 57.21 7.85 11 1 .13 .9 1.6 SMO 1.3 94 JAN 26 2255 12.60 37 6.18 121 51.80 4.17 21 .11 .3 .6 LOM 1.4 94 JAN 27 4 28.57 37 29.44 118 48.58 6.46 7 .04 1.0 1.1 MOR 1.1 94 JAN 27 53 56.38 39 10.16 123 9.20 7.23 10 .05 .5 1.0 MAA 1.5 94 JAN 27 102 49.27 37 33.44 118 50.61 9.41 14 .10 .5 1.0 MOR 1.3 94 JAN 27 135 32.60 38 48.35 122 28.37 9.75 38 .19 .4 .8 GVL 2.6 94 JAN 27 143 6.49 37 38.08 118 52.10 7.17 11 .12 .6 1.2 SMO 1.1 94 JAN 27 204 17.13 36 41.40 121 24.52 8.44 11 .04 .4 1.0 STN 1.1 94 JAN 27 335 49.48 38 48.06 122 28.19 9.01 21 .13 .3 .9 GVL 2.5 94 JAN 27 400 25.09 37 38.83 118 53.25 5.64 13 1 .15 .6 1.0 SMO 1.5 94 JAN 27 529 44.29 37 35.57 118 48.81 6.61 10 1 .15 .6 1.2 MOR 1.2 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 19 011625.5 43.646N 127.561W 10G 4.5 1.0 42 OFF COAST OF OREGON 011753.4 34.233N 118.573W 10G 0.9 28 SOUTHERN CALIFORNIA. ML 3.7 012653.5 34.286N 118.437W 10G 1.0 57 SOUTHERN CALIFORNIA. ML 3.7 015336.0 3.192S 135.969E 33N 5.9 6.9 1.1 59 IRIAN JAYA REG.,INDONESIA. Mw6.9 044046.1 34.212N 118.665W 10G 4.1 0.9 85 SOUTHERN CALIFORNIA. ML 4.5 044312.4 34.255N 118.800W 10G 1.0 43 SOUTHERN CALIFORNIA. ML 4.1 051457.3 34.207N 118.494W 10G 1.3 40 SOUTHERN CALIFORNIA. ML 3.6 062341.1 34.252N 118.459W 10G 1.3 33 SOUTHERN CALIFORNIA. ML 3.5 071404.0 34.184N 118.557W 10G 0.8 65 SOUTHERN CALIFORNIA. ML 3.9 091308.6 34.199N 118.826W 10G 0.9 58 SOUTHERN CALIFORNIA. ML 4.2 101740.9? 20.48 S 178.25 W 500G 5.2 0.8 16 FIJI ISLANDS REGION 104223.0 34.189N 118.812W 10G 1.1 45 SOUTHERN CALIFORNIA. ML 3.6 120908.8 34.285N 118.518W 10G 1.2 34 SOUTHERN CALIFORNIA. ML 3.7 123843.7 34.286N 118.490W 10G 0.9 39 SOUTHERN CALIFORNIA. ML 3.8 140911.9 34.088N 118.646W 10G 4.3 1.1 97 SOUTHERN CALIFORNIA. ML 4.5 144633.3 34.185N 118.533W 10G 0.9 52 SOUTHERN CALIFORNIA. ML 4.1 150346.6 34.239N 118.475W 10G 1.0 61 SOUTHERN CALIFORNIA. ML 3.7 162648.5 17.476S 178.615W 537D 5.1 0.8 108 FIJI ISLANDS REGION 195007.8 34.225N 118.499W 10G 3.3 1.0 38 SOUTHERN CALIFORNIA. ML 3.7 201749.5 34.268N 118.783W 10G 1.0 37 SOUTHERN CALIFORNIA. ML 3.6 210926.4 34.230N 118.842W 10G 5.0 1.2 126 SOUTHERN CALIFORNIA. Felt. 211143.1 34.248N 118.694W 10G 4.6 0.9 26 SOUTHERN CALIFORNIA. ML 4.8 212750.2 34.317N 118.740W 10G 0.9 29 SOUTHERN CALIFORNIA. ML 3.5 213438.0 34.278N 118.822W 10G 1.1 30 SOUTHERN CALIFORNIA. ML 3.7 214202.0 34.232N 118.500W 10G 0.9 35 SOUTHERN CALIFORNIA. ML 3.6 222731.1 42.291N 121.920W 5G 4.1 1.1 85 OREGON. ML 4.4 (GS). MD 4.0 (SEA). Felt in the Klamath Falls area. 225906.2* 34.370N 118.722W 10G 0.8 7 SOUTHERN CALIFORNIA. ML 3.5 JAN 20 013814.5 11.869S 74.385W 111D 4.5 1.0 38 CENTRAL PERU. Felt (III) in the Huancayo-Pariahuanca area and (II) at Lima. 055013.7 23.937N 121.776E 62* 5.4 1.1 100 TAIWAN 055824.5& 34.382N 118.699W 11 54 SOUTHERN CALIFORNIA. MD 3.6 065827.2& 34.361N 118.707W 11 79 SOUTHERN CALIFORNIA. MD 3.8 065914.3 44.568N 7.345E 10G 0.9 70 NORTHERN ITALY. ML 4.1 (VIE), 4.0 (ROM). 072240.4& 34.328N 118.528W 1 56 SOUTHERN CALIFORNIA. MD 3.8 074004.2& 67.450N 146.020W 12 31 NORTHERN ALASKA. . ML 3.8 083612.3 5.630S 130.781E 107? 5.1 0.8 21 BANDA SEA 085807.1 34.225N 118.564W 10G 1.4 42 SOUTHERN CALIFORNIA. ML 3.6 090652.7 6.013S 77.092W 122D 5.8 0.8 207 NORTHERN PERU. Mw 5.7 (HRV). Felt (IV) at Tarapoto; (III) at Moyobamba and Chachapoyas. Centroid, 122622.8& 34.305N 118.441W 7 41 SOUTHERN CALIFORNIA. ML 3.7 141914.1& 34.369N 118.525W 0 62 SOUTHERN CALIFORNIA. ML 3.6 154229.3 40.455N 125.013W 20G 4.1 0.8 81 OFF COAST OF NORTHERN CALIFORNIA. ML 4.2 (GS). Felt at Arcata, Eureka and Ferndale. 174909.7* 42.320N 121.924W 5G 0.5 10 OREGON. MD 2.9 (GS). 220444.5& 34.256N 118.461W 11 41 SOUTHERN CALIFORNIA. ML 3.7 224958.5% 11.374N 60.422W 33N 0.6 9 WINDWARD ISLANDS. MD 3.6 (TRN). JAN 21 022434.1 1.443N 128.203E 33N 6.0 7.3 1.2 23 HALMAHERA, INDONESIA. At least seven people killed in the Kau area. 041438.1 42.227N 122.026W 5G 0.9 17 OREGON. ML 3.1 (GS). 055604.8& 34.272N 118.650W 12 39 SOUTHERN CALIFORNIA. ML 3.5 180017.3* 4.926S 103.657E 92D 6.2 0.7 12 SOUTHERN SUMATERA, INDONESIA 183912.5 34.162N 118.588W 10G 4.6 0.8 29 SOUTHERN CALIFORNIA. ML 4.7 (GS). MD 4.6 (PAS). Felt strongly in the epicentral area. 184226.7 34.197N 118.527W 10G 1.0 17 SOUTHERN CALIFORNIA. ML 4.3 185241.6 34.137N 118.573W 10G 4.4 0.9 32 SOUTHERN CALIFORNIA. ML 4.3 185342.9* 34.264N 118.512W 10G 0.8 8 SOUTHERN CALIFORNIA. ML 4.3 185716.5* 34.148N 118.580W 10G 0.7 10 SOUTHERN CALIFORNIA. ML 3.7 JAN 22 090349.7& 34.361N 118.555W 4 19 SOUTHERN CALIFORNIA. ML 3.5 152437.2* 53.600N 170.457W 212? 4.7 0.9 69 FOX ISLANDS, ALEUTIAN ISLANDS 231453.1 34.283N 118.466W 10G 0.7 23 SOUTHERN CALIFORNIA. ML 3.8 JAN 23 024846.8& 34.337N 118.516W 6 17 SOUTHERN CALIFORNIA. ML 3.6 165354.0 21.573N 142.990E 315D 4.9 1.1 63 MARIANA ISLANDS REGION JAN 24 024102.6& 34.252N 118.475W 13 25 SOUTHERN CALIFORNIA. ML 3.8 041515.7 34.146N 118.682W 10G 4.2 1.0 48 SOUTHERN CALIFORNIA. ML 4.7 055021.1 34.182N 118.783W 10G 4.2 0.8 38 SOUTHERN CALIFORNIA. ML 4.3 055419.0 34.285N 118.741W 10G 4.1 1.0 28 SOUTHERN CALIFORNIA. ML 4.4 104826.5 34.320N 118.576W 10G 1.1 19 SOUTHERN CALIFORNIA. ML 3.5 JAN 25 024438.0* 42.669N 99.956W 5G 0.7 9 NEBRASKA. mbLg 3.3 (GS). Felt at Ainsworth, Sparks and Springview. Also felt at Keyapaha and Millboro, South Dakota. 054118.0 1.655S 77.916W 168D 5.1 0.8 73 ECUADOR 071246.1* 10.547N 41.947W 33N 5.1 5.8 1.4 81 NORTHERN MID-ATLANTIC RIDGE 171729.8 34.303N 118.510W 10G 1.1 48 SOUTHERN CALIFORNIA. ML 3.6 184243.4 34.318N 118.466W 10G 1.1 61 SOUTHERN CALIFORNIA. ML 3.5 Notes: 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.