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The ML 4.5 Loma Linda, California Earthquake of February 21, 2000

A magnitude 4.5 (ML) earthquake on February 21, 2000 (13:49:43 UTC; 05:49:43 a.m. PST), was located (Latitude 34.047° N, Longitude 117.255° W) beneath Loma Linda, CA at a depth of 15.0 km.  The earthquake triggered at least 14 digital strong-motion recorders operated by the U.S. Geological Survey’s (USGS) National Strong-Motion Program (NSMP) within an epicentral distance of 67 km.    The following table contains preliminary corrected peak acceleration and velocity values for those instruments.

Preliminary corrected peak acceleration and velocity values for strong-motion stations operated by the USGS NSMP in the region of the February 21, 2000, ML 4.4 Loma Linda, CA earthquake.  (posted 2/25/2000, updated 5/17/2000)
Station Inst. Serial Ch. Instrument Inst. Lat. Long. Dist. Azm. Orient. Pk Acc. Pk Vel.
No. Type No.   Name Owner (deg N) (deg W) (km) (deg) (deg) (cm/s/s) (cm/s)
129 Etna 1989 A Loma Linda Univ. Medical Center USGS 34.050 -117.264 1 282 90 9.89 -0.18
      B             360 10.76 0.58
      C             UP 6.11 0.18
5328 K2 599 A Montecito Memorial Park, Loma Linda, CA USGS 34.047 -117.277 2 267 360 -12.01 0.34
      B             UP 12.71 -0.22
      C             90 15.70 0.29
5329 K2 585 A San Bernardino Fire Station #11 USGS 34.069 -117.275 3 316 180 12.30 0.36
      B             UP -6.68 0.14
      C             270 18.70 -0.40
5341 Etna 1983 A San Bernardino Kaiser Medical Clinic USGS 34.058 -117.305 5 283 90 -7.14 -0.16
      B             360 9.81 -0.28
      C             UP 11.61 0.15
5037 K2 551 A Olive Dell Ranch, Colton, CA USGS 34.005 -117.224 5 152 360 -13.54 0.31
      B             UP -12.52 0.14
      C             90 13.95 -0.23
5339 K2 584 A San Bernardino Fire Station #10 USGS 34.092 -117.290 6 323 180 21.13 0.65
      B             UP -14.72 0.21
      C             270 -20.15 -0.66
5373 Etna 2013 A San Bernardino Lincoln Elem. Sch. USGS 34.123 -117.288 9 338 90 13.00 0.33
      B             360 -14.30 -0.40
      C             UP 7.15 -0.10
5161 Etna 1982 A Highland Fire Station #8 USGS 34.136 -117.213 10 20 90 17.11 0.40
      B             360 -9.59 0.30
      C             UP 10.93 0.10
5327 K2 536 A San Bernardino Fire Station #7 USGS 34.165 -117.289 13 345 360 23.97 0.40
      B             UP 12.49 0.15
      C             90 -15.64 -0.36
5076 Etna 1434 A Mill Ck Ranger Sta, Mentone, CA USGS 34.080 -117.045 19 80 180 -5.32 -0.20
      B             UP -5.11 -0.15
      C             270 -7.74 0.26
5371 Etna 1995 A Santa Bernardino N. Verdemont Elem. Sch. USGS 34.210 -117.370 21 329 90 12.76 0.29
      B             360 -11.87 0.28
      C             UP -10.27 0.15
5409 K2 588 A Lytle Creek Fire Station USGS 34.234 -117.482 30 314 360 -8.51 -0.22
      B             UP 6.69 -0.11
      C             90 -8.84 -0.15
5073 K2 587 A Cabazon Post Office USGS 33.918 -116.784 46 108 180 -4.35 -0.15
      B             UP -2.16 0.04
      C             270 3.96 -0.07
5222 K2 593 A Tripp Flats, Anza Array USGS 33.602 -116.756 67 137 360 4.83 0.10
      B             UP 2.40 0.05
      C             90 -6.33 0.14

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