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
March 27 - April 2, 1997

 Stephen R. Walter
U.S. Geological Survey
345 Middlefield Rd.  MS-977, Menlo Park, CA  94025

   
San Francisco Bay Area        
     
  During the seven day period ending at midnight on Wednesday, April 2,
1997 the U.S. Geological Survey office in Menlo Park recorded 34
earthquakes of magnitude one (Mm) and greater within the San Francisco Bay
area shown in Figure 1. Sixteen were as large as M2, including eleven M3
shocks in the Suisun Bay area southeast of Fairfield.  This total compares
to 18 earthquakes during the prior seven day period (March 20 - 26), nine
of which were as large as M2.
  The Fairfield activity began last Wednesday and was briefly mentioned in
last week's summary.  The first M3 quake occurred early last Thursday
morning and was followed by eight more M3 events over the next 12 hours
(#1/1).  The M3 events were felt in the Fairfield-Pittsburg-Concord areas,
though none produced any significant damage.  Activity declined later
Thursday afternoon - four events as large as M2 occurred through Saturday
- but resumed Monday evening/Tuesday morning with a pair of M3's.  
  While this was one of the more active sequences seen in this area in the
past 25 years, the size of the earthquakes was not that unusual.  Nearly
20 M3 earthquakes have been recorded in this area since 1970 including two
that were as large as M4.2.  Like previous earthquakes in this area, last
week's earthquakes were all located at depths of 20 to 23 km.  This is
about ten km deeper than earthquakes occur along most other faults in the
Bay Area.   
   A M2.5 event west of Cupertino was reported to have been felt by some
residents in the immediate epicentral area (#2/1).   Only slightly smaller
but apparently unfelt were a pair of M2's on the central Calaveras fault
six miles east of Gilroy (#3/1). Finally, a M2.4 event occurred on the
northern extension of the Hayward fault beneath San Pablo Bay, about five
miles northwest of Pinole (#4/1).  
  
   
Northern & Central California
	
    Aside from the Fairfield activity, the region was relatively quiet
during the week with only two earthquakes as large as M3.  The first of
these was a M3.1 along the Nevada border about eight miles east of
Markleeville (#4/2).  This is much the same location as a M3.2 on March
24.  The second M3 occurred in the Long Valley caldera (see below).
   The northern Coast Range saw a trio of M2 earthquakes on the northern
Maacama fault.  Two occurred four miles west of Laytonville on Monday
afternoon (#6/2).  The third followed on Wednesday morning about five
miles east of Willits (#7/2).  Earlier in the week a M2.0 occurred near
the Bartlett Springs fault four miles southeast of Lake Pillsbury (#1/2). 
The Geysers geothermal area was a bit more quiet than usual with just four
M2 earthquakes, the largest a M2.4 late Wednesday evening.
   The Cape Mendocino area experienced just one earthquake as large as M2,
a 25-km-deep event 28 miles east of Petrolia (#5/2).   
   The only notable activity in central California occurred along the
central creeping segment of the San Andreas where four M2 earthquakes were
recorded, the two largest both having magnitudes of M2.5 (#2/2).

Long Valley Caldera

   As has been the case so far this year, what activity there was in the
area occurred south of the caldera.  This week, there was a small cluster
of earthquakes just south of the caldera about 2 miles northwest of
Convict Lake (#1/3). The activity began with a M2.7 Tuesday morning,
continued with a M3.3 and a M2.0 later that evening, and ended (so far
anyway) with a M2.3 on Wednesday evening.  Tuesday's M3.3 event was likely
felt by residents of Mammoth Lakes, just five miles to the northwest.

USA Seismicity (March 26 - April 2)
  
   The National Earthquake Information Center (NEIS) reported a M2.6
occurred Sunday night in north-central Oregon east of the town of Condon
(#1/4).  This is the same location where a pair of M2's occurred on March
21.  Other notable earthquakes in the contiguous U.S. included a M3.5 near
the north end of San Clemente Island (#2/4) and a pair of M3's in central
Arizona (#3/4).  The largest of these was felt at Flagstaff, Grand Canyon
Village, and Valle.  The other was felt only at Valle.
   As is often the case, the largest domestic earthquakes occurred in
Alaska.  In this case a swarm of over a dozen M4 and M5 events rocked the
Rat Islands in the central Aleutian archipelago (#4/5).  Somewhat farther
to the east a M5.5 occurred in the Andreanof Islands the was felt on the
island of Adak.  Finally, a M4.8 occurred on the Alaska Peninsula near the
southern end of Cook Inlet.

The Planet Earth  (March 26 - April 2)

    Two damaging earthquakes occurred on the planet last Wednesday. 
First was a M5.0 in southern Lebanon that slightly damaged 50 buildings   
in the Beirut area and the was felt throughout the country, in northern &
central Israel, and in Syria (#1/5).  It was followed nine hours later by
a M4.7 aftershock that was felt over much of the same region.  A M5.6 in
Kyushu, Japan injured at least 22 people, damages many homes, and produced
landslides in the Kagoshima Prefecture (#2/5).   
    Moderate earthquakes that apparently produced no significant damage
included M5.0 and M5.6 events south of Panama (#3/5), a M6.0 along the
Chile-Bolivia border that was strongly felt at Tacna, Peru and Iquique,
Chile (#5/5), and a M5.7 off the northeast coast of Venezuela that was
felt strongly on the islands of Tobago and Trinidad and as far north as
St. Vincent (#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

97 MAR 27  911 18.56 38  9.26 121 56.04 23.31 33   .17  .5  .4 JQN   2.0
97 MAR 27 1010 45.24 38  8.99 121 56.27 20.68 37   .10  .3  .2 JQN   3.2
97 MAR 27 1017  5.57 38  9.54 121 56.03 23.07 38 1 .16  .3  .4 JQN   2.0
97 MAR 27 1026 35.32 38  8.91 121 56.06 21.57 50 1 .11  .2  .2 JQN   2.8
97 MAR 27 1111 24.55 38  8.94 121 56.45 22.18 54 1 .16  .3  .2 JQN   2.8

97 MAR 27 1130  7.00 38  8.80 121 56.71 21.38 67 2 .18  .3  .2 JQN   3.4
97 MAR 27 1143 14.44 38 49.37 122 48.20  3.81  7   .02  .4  .9 GEY   1.2
97 MAR 27 1315 33.17 38 10.26 122  5.27 10.70 19   .39  .8 2.6 GVL   1.7
97 MAR 27 1338  8.83 38  8.88 121 56.04 21.26 59 2 .14  .2  .2 JQN   3.2
97 MAR 27 1401 24.22 38  8.83 121 56.15 21.37 55   .13  .3  .2 JQN   3.4

97 MAR 27 1533  7.23 38 56.50 123  8.68  5.07  8 1 .03 1.5 3.0 MAA   1.4
97 MAR 27 1539 49.01 38  8.79 121 56.82 21.19 70 1 .23  .4  .3 GRN   3.7
97 MAR 27 1635 19.24 38 10.06 121 55.30 20.04  7   .13 1.1  .9 JQN   1.5
97 MAR 27 1707 37.75 38  9.23 121 56.17 22.89 45 1 .17  .3  .2 JQN   2.4
97 MAR 27 1716 42.85 38  9.27 121 56.86 22.65 60 1 .18  .4  .2 JQN   3.3

97 MAR 27 1801 43.17 38  9.12 121 56.78 21.82 60   .17  .3  .2 JQN   3.3
97 MAR 27 1821 23.45 38 49.59 122 47.68  3.86 12   .03  .2  .7 GEY   1.4
97 MAR 27 1951 35.35 35 59.98 120 32.95  3.83  8   .00  .6 1.6 MID   1.3
97 MAR 27 2216 18.79 38  9.35 121 55.92 21.30 29   .12  .4  .3 JQN   2.5
97 MAR 27 2247 53.00 38  8.91 121 56.35 22.11 63   .16  .3  .2 JQN   3.5

97 MAR 27 2253  7.61 38  8.93 121 56.47 21.71 59 1 .14  .3  .2 JQN   3.4
97 MAR 28  116 26.18 38 49.84 122 48.09  2.99  7   .02  .3  .8 GEY   1.3
97 MAR 28  139 20.01 38 49.58 122 48.08  3.12  8   .02  .3  .7 GEY   1.2
97 MAR 28  144 42.08 38 49.42 122 48.16  3.66  8   .02  .3  .8 GEY   1.2
97 MAR 28  224 42.91 37 26.95 118 50.25 11.90 10   .05 1.7 2.5 MOR   1.5

97 MAR 28  335 58.82 38 11.05 121 58.32  5.01  7   .33 1.421.7 JQN - 1.6
97 MAR 28  426 31.51 37 18.31 122  5.94  5.48 82 1 .16  .1  .3 BLM   2.5
97 MAR 28  501 11.54 38 49.63 122 47.64  3.48  8   .04  .3  .8 GEY   1.4
97 MAR 28  501 22.62 39 23.47 122 53.43 10.03 21   .03  .2  .7 BAR   2.0
97 MAR 28  519 24.74 38 46.40 122 53.44  4.68 16   .07  .3  .8 GEY   1.6

97 MAR 28  639 32.49 36 51.50 121 24.13  7.68 18   .04  .3  .9 HOL   1.0
97 MAR 28  749 41.19 38 47.43 122 46.44  2.95 19   .05  .2  .5 GEY   1.8
97 MAR 28  800  9.82 37 35.58 118 51.51  7.65 10   .04  .6  .5 MOR   1.5
97 MAR 28  904 26.52 37  6.18 121 31.48  3.06 13   .03  .2  .4 CYN   1.1
97 MAR 28 1302 41.96 36 34.37 121  9.88  2.97 52   .07  .1  .3 PIN   2.5

97 MAR 28 1303 47.55 38  9.82 121 55.76 24.07 15   .15  .5  .7 JQN   2.0
97 MAR 28 1648 14.39 37 32.76 118 49.54 12.28  7   .02 2.3 4.0 MOR   1.0
97 MAR 28 1743 49.01 38 48.10 122 44.63  1.66  7   .02  .3 1.0 GEY   1.3
97 MAR 28 2049 22.26 38  0.91 119  9.26 15.82 31 2 .19  .6 2.4 MOL   2.4
97 MAR 28 2246 16.70 38 47.72 122 48.51  4.88 27   .05  .2  .3 GEY   2.1

97 MAR 28 2314 48.29 36 23.56 120 56.07  5.44  7   .04 1.0 3.6 BIT   1.1
97 MAR 29  223 47.95 38 47.10 122 47.51  0.08  9 1 .12  .3 1.1 GEY # 1.4
97 MAR 29  431  9.73 36 59.43 121 28.11  5.70 69 1 .10  .1  .3 CYS   2.4
97 MAR 29  549 47.61 36 59.25 121 28.05  5.58 68   .08  .1  .3 CYS   2.1
97 MAR 29  653  9.11 37 38.76 118 58.69  7.12  9   .02  .7  .9 SMO   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

97 MAR 29  820 46.66 38  9.10 121 55.89 21.85 39   .22  .4  .3 JQN   2.3
97 MAR 29  858 14.39 37 31.96 118 51.14  8.60 21   .06  .3  .7 MOR   1.7
97 MAR 29  931 57.20 37 32.43 118 50.85  8.75 16 1 .05  .3  .6 MOR   1.5
97 MAR 29  946  1.96 38 44.67 119 39.31  7.52 56 2 .10  .3  .7 WAK   3.1
97 MAR 29 1057 35.68 38 48.40 122 46.19  1.94  8   .03  .3  .6 GEY   1.2

97 MAR 29 1156 28.68 37 10.50 122  2.47  6.07 17 2 .07  .2  .3 BLM   1.1
97 MAR 29 1305 23.12 38 10.40 121 57.98  6.86  9 1 .14  .411.8 JQN - 1.7
97 MAR 29 1853 15.32 38 48.12 122 43.96  2.13 10   .03  .2  .6 GEY   1.6
97 MAR 29 1917 56.77 37 38.19 118 51.96  6.64 11 1 .11  .5  .9 SMO   1.2
97 MAR 29 2115 29.65 38 48.31 122 44.78  0.54  8   .04  .3  .8 GEY   1.3

97 MAR 30   18 38.76 38 49.45 122 47.82  3.83 11   .04  .3  .7 GEY   1.4
97 MAR 30  149 33.26 36 51.35 121 35.08  6.64 26   .10  .3  .4 SJB   1.3
97 MAR 30  211 53.36 39 14.58 123 11.75  8.24 12 1 .03  .5  .6 MAA   1.3
97 MAR 30  212 36.36 36 28.03 121  2.36  5.67 50 1 .08  .2  .5 BIT   2.5
97 MAR 30  238 27.15 38 10.58 121 58.43  6.70  8   .09  .410.1 GRN - 1.5

97 MAR 30  308 48.60 39 30.37 123  8.17  0.42 19 2 .18  .4 4.1 BAR # 1.7
97 MAR 30  507 17.25 38 49.17 122 48.56  3.92 14   .03  .2  .5 GEY   1.4
97 MAR 30  515 55.22 35 58.23 120  2.81  9.12  9   .03 1.2 1.4 COA   1.6
97 MAR 30  633  9.70 37 23.95 118 35.13  8.05  9   .34 2.1 4.1 RVL   1.3
97 MAR 30  634  1.35 38  1.43 122 22.86  7.21 70 1 .20  .2  .4 ROG   2.4

97 MAR 30  730 42.29 38 48.72 122 48.75  3.51 10   .03  .3  .5 GEY   1.4
97 MAR 30  740 39.95 38 10.04 121 55.13 24.44 33   .18  .4  .4 JQN   2.0
97 MAR 30 1511 29.62 38 13.69 118 23.36  5.15 23   .06 1.3 8.2 MOL - 2.0
97 MAR 30 1511 48.91 37  8.92 121 32.46  8.31 39   .05  .2  .4 CYN   1.3
97 MAR 30 1632 53.93 38 48.86 122 48.70  3.35 21   .04  .2  .4 GEY   1.8

97 MAR 30 1645 31.52 38 51.08 122 48.87  1.97 16   .05  .2  .8 GEY   1.7
97 MAR 30 1742 14.75 37 38.35 118 56.07  5.60 15 1 .03  .3  .4 SMO   1.2
97 MAR 30 1812 55.47 39 34.33 123 29.29  0.28  9   .08  .6 2.0 MAA   1.6
97 MAR 30 1838 17.95 38 47.98 122 48.73  4.36  8   .03  .4  .8 GEY   1.2
97 MAR 30 2039  4.43 38 48.10 122 48.62  4.19  7   .02  .4 2.0 GEY   1.1

97 MAR 30 2156 43.32 39 34.19 123 29.45  1.41 12   .09  .4 2.5 MAA   2.0
97 MAR 30 2242 44.99 40 21.57 123 45.48 25.40 15 1 .11  .4  .9 MEN   2.0
97 MAR 30 2309 44.68 37 33.24 118 49.81  9.65 10   .06  .7  .8 MOR   1.3
97 MAR 30 2310 42.02 37 32.31 118 50.99  8.20 20 1 .06  .5  .6 MOR   1.6
97 MAR 31  307 51.31 37 30.90 121 40.52  4.33 11 1 .03  .3  .8 HAM   1.2

97 MAR 31  540 24.97 38 48.96 122 48.32  3.40 11   .02  .3  .6 GEY   1.3
97 MAR 31  652 49.26 36  6.63 120 40.05  3.08 24 1 .05  .3  .4 SLA   1.8
97 MAR 31  707 21.24 37 34.77 118 50.72 13.16  7   .05 4.4 5.6 MOR - 1.1
97 MAR 31  807  0.83 39 13.30 122 41.76  6.85  7   .03  .7 2.0 BAR   1.3
97 MAR 31  847 50.46 38 47.70 122 48.45  4.31 18   .04  .2  .4 GEY   1.6

97 MAR 31 1258  0.36 38 50.31 122 48.63  1.41  7   .08  .7 1.3 GEY   1.2
97 MAR 31 1348 25.87 38 49.36 122 48.25  4.00  9   .03  .3  .7 GEY   1.5
97 MAR 31 1358 46.81 38 47.82 122 48.73  4.25  9   .02  .3  .7 GEY   1.4
97 MAR 31 1500  6.42 36 46.46 121 16.82  8.35 53 1 .05  .1  .2 PAI   1.7
97 MAR 31 1554 10.34 38 49.36 122 48.00  4.02  7   .02  .4  .7 GEY   1.2

--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

97 MAR 31 1621 48.02 36 57.82 121 35.80  3.07 30 1 .11  .2  .3 SAR   1.3
97 MAR 31 1808 36.61 36 33.96 121  9.33  2.75 39 1 .07  .2  .3 PIN   2.1
97 MAR 31 1849 20.71 38 47.54 122 46.71  2.49 11   .04  .2  .6 GEY   1.7
97 MAR 31 2255 16.37 39 40.47 123 33.30  1.79 18   .05  .2  .6 MAA   2.7
97 MAR 31 2257 46.25 39 40.49 123 33.05  1.25 14   .03  .3  .9 MAA   1.9

97 MAR 31 2304 46.92 36 45.79 121 16.50  6.61 13 1 .03  .4 1.0 PAI   1.1
97 MAR 31 2328  6.73 39 40.41 123 33.27  1.96 17   .04  .2  .6 MAA   2.5
97 APR  1  136 54.87 38  8.86 121 56.24 21.50 62   .14  .3  .2 JQN   3.6
97 APR  1  151  7.33 38  9.67 121 56.67 25.21 24   .15  .7  .5 JQN   1.9
97 APR  1  244 19.77 38 47.28 122 45.54  1.28 10   .04  .3  .7 GEY   1.4

97 APR  1  251 53.20 38 49.65 122 48.05  3.57  7   .02  .5  .9 GEY   1.2
97 APR  1  321  6.52 38 48.85 122 48.52  3.48  8   .02  .4  .7 GEY   1.0
97 APR  1  527 58.89 38 11.77 121 57.23  4.96  7   .03  .5 6.2 JQN -    
97 APR  1 1022 32.20 38 49.22 122 47.88  4.26 19   .08  .2  .4 GEY   1.8
97 APR  1 1023 54.41 38 48.79 122 47.81  4.37 18   .02  .2  .4 GEY   1.9

97 APR  1 1328  7.75 36 33.88 121  9.44  3.39 12   .04  .3  .5 PIN   1.0
97 APR  1 1548 51.85 38 49.10 122 48.67  3.59  9   .02  .4  .6 GEY   1.5
97 APR  1 1700 21.53 37 37.14 118 53.15  3.80 18   .09  .4  .9 SHE   2.7
97 APR  1 1740 59.04 39 47.92 123 27.35  5.65  9   .06  .4  .8 MAA   1.8
97 APR  1 1808 45.50 37 36.82 118 52.64  5.09  9   .08  .6 1.6 SHE   1.4

97 APR  1 1837 18.69 38  9.36 121 56.35 20.94 33   .13  .4  .3 JQN   3.4
97 APR  1 2231 15.26 38 45.76 122 41.98  2.77  8   .06  .6  .5 GEY   1.5
97 APR  2  325 19.11 37 36.73 118 53.13  3.23 23   .11  .3  .8 SHE   3.3
97 APR  2  558 40.87 37 37.03 118 52.89  7.96  7   .06  .9 1.4 SHE   1.2
97 APR  2  717  9.30 37 36.74 118 53.24  2.15 12   .07  .4 1.4 SHE   2.0

97 APR  2 1006 17.93 37 34.19 118 51.16  8.76 15   .03  .4  .6 MOR   1.8
97 APR  2 1051 26.82 37 41.11 118 52.92 14.19 12   .21  .8 1.5 DOM   1.4
97 APR  2 1214 12.49 38  9.10 121 54.57 21.60 21   .19  .7  .3 JQN   2.4
97 APR  2 1412 34.89 38 49.14 122 50.16  0.91 16   .05  .2  .5 GEY   2.0
97 APR  2 1656 28.80 38 49.09 122 47.96  3.81 19   .05  .2 1.0 GEY   2.1

97 APR  2 1801  4.64 37 36.47 118 53.06  2.69  7   .05  .5 7.1 SHE - 1.6
97 APR  2 1930 13.08 39 24.18 123 15.88  4.94 23   .22  .5 1.7 MAA   2.3
97 APR  2 2227  9.01 38 10.08 121 55.99 22.01 26   .16  .5  .3 JQN   2.7
97 APR  3  113 57.45 37 36.67 118 53.17  2.47 15   .07  .4 1.4 SHE   2.3
97 APR  3  114 52.23 37 36.51 118 52.66  5.66  8   .07  .6 1.9 SHE   1.4

97 APR  3  314 58.52 36 41.01 121 18.74  5.78 40   .08  .2  .5 STN   2.0
97 APR  3  337 45.21 38 48.67 122 50.83  2.43  7   .03  .6 2.8 GEY   1.0
97 APR  3  437 11.83 38 53.95 122 58.56  1.64 10   .08  .3 2.3 MAA   1.7
97 APR  3  632 10.36 38 47.01 122 46.23  2.27 27   .07  .2  .5 GEY   2.4
97 APR  3  703 55.76 38 47.84 122 48.62  4.14  8   .02  .4  .8 GEY   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
-------------------------------------------------------------------------------
MAR 26
003233.2*  8.063S 107.714E  33N 4.7     1.0  11 JAWA, INDONESIA
011541.4  17.155N  85.462W  10G 4.6     0.9  26 CARIBBEAN SEA
022921.1? 51.06 N 179.54 E  33N 4.1     1.7  11 RAT ISLANDS, ALEUTIAN IS. 
023244.3  51.378N 179.455E  33N 4.7     1.1  61 RAT ISLANDS, ALEUTIAN IS. ML 5.2
042251.2  33.372N  35.486E  10G 5.0 4.4 1.1 113 JORDAN - SYRIA REGION. ML 5.6
        About 50 buildings slightly damaged in the Beirut area, Lebanon.
        Felt throughout Lebanon, in northern and central Israel, and in Syria.
073349.0* 15.159N  59.762W  33N         0.6   7 LEEWARD ISLANDS
083147.5  31.906N 130.532E  10G 5.6 5.9 1.3 197 KYUSHU, JAPAN. Mw 6.1 (GS), 6.1
        At least 22 people injured, damage to many houses and landslides
        in Kagoshima Prefecture.
090459.8  31.964N 130.401E  10G 4.3     1.2  13 KYUSHU, JAPAN
091915.3  34.914N  32.919E  33N 4.3     1.0  24 CYPRUS REGION. MD 4.0 (ISK).
093138.0* 54.406N 160.889E  72* 4.2     0.8  26 NEAR EAST COAST OF KAMCHATKA
112137.6  51.219N 179.572E  33N 4.8     0.9  74 RAT ISLANDS, ALEUTIAN IS.
120658.3? 30.54 S 177.30 W  33N 5.0     1.2  12 KERMADEC ISLANDS, NEW ZEALAND
132022.1  33.725N  35.422E  10G 4.7     0.9  38 JORDAN - SYRIA REGION. ML 5.0
        Felt in parts of Lebanon. Also felt in northern and central Israel.
192115.4* 20.011S 174.024W  33N 4.7     0.8  25 TONGA ISLANDS
212706.9  51.240N 179.440E  33N 4.9     0.9  95 RAT ISLANDS, ALEUTIAN IS. ML 5.2
235404.0* 51.023N 179.488E  33N 4.8     1.0  37 RAT ISLANDS, ALEUTIAN IS. ML 5.2

MAR 27
001642.2  51.241N 179.460E  33N 4.8     0.9  67 RAT ISLANDS, ALEUTIAN IS. ML 5.3
020928.3? 51.27 N 179.21 E  33N 4.3     1.5   6 RAT ISLANDS, ALEUTIAN IS. ML 4.0
041304.3* 21.984S 176.648W 138D 4.7     0.9  28 FIJI ISLANDS REGION
072034.7  22.275S  68.474W 120D 4.4     0.6  18 NORTHERN CHILE
100216.9   4.000N  82.576W  10G 5.0 4.5 1.1  63 SOUTH OF PANAMA
102305.9? 51.12 N 179.23 E  33N 4.5     1.1  21 RAT ISLANDS, ALEUTIAN IS. ML 4.5
104226.4  51.200N 179.327E  33N 5.1 5.1 1.0  95 RAT ISLANDS, ALEUTIAN IS. ML 5.4
105502.9? 51.01 N 179.02 E  33N 4.4     0.3   8 RAT ISLANDS, ALEUTIAN IS. ML 4.0
110654.4? 50.91 N 178.78 E  33N 4.4     0.9  13 RAT ISLANDS, ALEUTIAN IS. ML 4.4
111638.0* 50.961N 179.549E  33N 4.5     0.7  25 RAT ISLANDS, ALEUTIAN IS. ML 4.6
113007.0& 38.149N 121.940W  21               17 NORTHERN CALIFORNIA. MD 3.2
                                                Felt in the Fairfield-Martinez area.
113737.2? 50.91 N 179.03 E  33N 4.3     1.1   7 RAT ISLANDS, ALEUTIAN IS. ML 4.0
120804.8* 51.064N 179.553E  33N 4.5     1.0  14 RAT ISLANDS, ALEUTIAN IS. ML 4.5
120957.0? 50.82 N 178.86 E  33N 4.5     0.6  12 RAT ISLANDS, ALEUTIAN IS. ML 4.4
121729.9? 50.91 N 178.99 E  33N 3.9     0.5   7 RAT ISLANDS, ALEUTIAN IS. ML 4.2
124124.0? 50.77 N 179.55 E  33N 4.4     0.9  12 RAT ISLANDS, ALEUTIAN IS. ML 4.2
133808.0& 38.150N 121.930W  20               15 NORTHERN CALIFORNIA. MD 3.0
                                                Felt in the Fairfield-Martinez area.
140124.0& 38.150N 121.940W  22               13 NORTHERN CALIFORNIA. MD 3.0
                                                Felt in the Fairfield-Martinez area.
141612.3* 39.897N 143.438E  33N 4.6     1.3  15 OFF EAST COAST OF HONSHU, JAPAN
153949.0& 38.148N 121.936W  21               21 NORTHERN CALIFORNIA. MD 3.5
                                                Felt in the Fairfield-Martinez area.
173508.2  19.349N 145.556E 144* 4.7     0.8  29 MARIANA ISLANDS
180143.0& 38.150N 121.940W  21               12 NORTHERN CALIFORNIA. MD 3.0
                                                Felt in the Fairfield-Martinez area.
213942.3* 51.674N  16.154E   5G         0.4   9 POLAND. ML 3.6 (VIE).
224753.0& 38.150N 121.940W  21               13 NORTHERN CALIFORNIA. MD 3.3
                                                Felt in the Fairfield-Martinez area.
225307.0& 38.150N 121.940W  21               14 NORTHERN CALIFORNIA. MD 3.1
                                                Felt in the Fairfield-Martinez area.

MAR 28
051509.3*  4.629S 153.186E  33N 5.1 4.8 1.0  27 NEW IRELAND REGION, P.N.G.
060811.6* 51.167N 179.100E  33N 4.7     1.0  29 RAT ISLANDS, ALEUTIAN IS.
072802.0& 45.201N 120.056W   2               36 WASHINGTON-OREGON BORDER. MD 2.6
224024.3  17.702S 179.361W 554D 4.8     0.5  52 FIJI ISLANDS REGION

MAR 29
094600.6  38.796N 119.613W   5G         0.8  13 CALIFORNIA-NEVADA BORDER. ML 3.3
162600.5* 31.039S  68.403W 112D 4.6     0.8  16 SAN JUAN PROVINCE, ARGENTINA

MAR 30
065045.7* 51.020N 128.978W  10G 4.1     1.0  20 VANCOUVER ISLAND REGION
082401.1  33.053N 118.619W   5G         0.9  27 SOUTHERN CALIFORNIA. MD 3.5
083832.2? 15.15 S 173.21 W  33N 5.0 5.5 0.5  43 TONGA ISLANDS
120102.6* 16.761N  98.059W  33N 4.4     0.7  23 NEAR COAST OF GUERRERO, MEXICO
125744.8* 37.765N  20.054E  33N 4.7     1.0  16 IONIAN SEA
140540.6  21.916S 177.194W 221D 5.4     0.7  98 FIJI ISLANDS REGION. Mw 5.4
230557.1  51.363N 178.126W  33N 5.5 4.8 0.8 139 ANDREANOF ISLANDS, ALEUTIAN IS.
                                                Felt on Adak.

MAR 31
073448.8  35.543N 111.980W   5G         0.9  21 EASTERN ARIZONA. ML 3.7 (GS).
            Felt at Flagstaff, Grand Canyon Village and Valle.
113928.8* 51.765N 158.037E  56D 5.0     0.7  66 NEAR EAST COAST OF KAMCHATKA
154609.9  35.503N 112.035W   5G         0.7  15 WESTERN ARIZONA. ML 3.3 (GS).
                                                Felt at Valle.
173220.0* 16.169N  92.543W 179D 4.8     0.8  30 CHIAPAS, MEXICO
182112.5* 18.031N  67.408W   5G         0.9   7 MONA PASSAGE. Felt (IV) in the
                                                Mayaguez area, Puerto Rico.

APR 01
013654.0& 38.170N 121.940W  20               17 NORTHERN CALIFORNIA. MD 3.4
                                                Felt in the Fairfield-Martinez area.
082921.0  58.388N 155.292W  10G 4.8     0.8  42 ALASKA PENINSULA
151144.9   7.600N  82.457W  10G 5.6 5.4 1.1 108 SOUTH OF PANAMA. Mw 6.1 (GS),
183332.6  17.998S  69.255W 114D 6.0     0.8 107 PERU-BOLIVIA BORDER REGION. Mw 6.2
      Felt (V) at Tacna, Peru. Felt (V) at Iquique; (IV) at Arica and Putre, Chile. 

APR 02
000124.0* 44.446N 152.952E  33N 5.4     0.8  50 EAST OF KURIL ISLANDS
061428.5  11.321N  61.316W  33N 5.7 5.5 0.9 101 WINDWARD ISLANDS. Mw 6.2 (GS),
      Felt strongly on Tobago, throughout Trinidad and as far northas St. Vincent. 

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.