EPICENTRAL LOCATIONS AND ARRIVAL TIMES APRIL 1987 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870401 419 34.04 31-48.37 115-50.48 15.00* 12 108 78.4 0.31 1.2 2.7 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD ENX P 4 19 46.43 S 1 56.73 2.5 CPBX P 4 19 47.14 S 1 59.60 PBX P 4 19 47.68 S 1 58.70 2.7 SPX P 4 19 48.40 S 1 59.60 2.7 CBX P 4 19 48.58 S 1 60.68 2.4 2.7 VEX P 4 19 48.58 S 1 60.59 EGX IP 1 4 19 54.22 S 1 70.00 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870403 323 12.11 32-59.82 117-50.02 15.00* 8 322 133.4 0.42 6.1 3.6 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD CBX P 3 23 33.10 S 1 48.40 3.6 ENX P 3 23 37.05 S 1 57.85 PBX P 3 23 38.70 S 1 60.20 CPBX P 3 23 49.30 S 1 77.80 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870403 1055 37.37 31-28.43 115-39.36 15.00* 6 332 105.8 0.21 6.3 2.6 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD ENX P 10 55 53.80 S 1 66.60 PBX P 10 55 53.90 S 1 67.20 CBX P 10 55 58.20 S 1 74.00 2.6 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870407 1557 49.01 32-23.99 115-21.46 10.00* 8 163 5.4 0.58 5.5 2.5 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD CPBX IP 15 57 50.30 VEX P 15 57 53.60 S 1 56.50 CBX P 15 58 9.60 S 1 22.80 2.5 ENX P 15 58 10.10 PBX P 15 58 12.30 S 1 28.80 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870407 1821 28.27 32-50.31 115-21.31 8.00* 6 342 135.9 0.26 7.1 3.3 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD CBX P 18 21 49.64 S 1 65.54 3.3 ENX P 18 21 53.32 S 1 73.32 PBX P 18 21 55.20 S 1 76.60 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870408 1838 31.08 32-47.61 116-29.67 16.00* 6 352 55.5 0.12 8.1 2.5 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD CBX P 18 38 40.20 S 1 47.20 2.5 ENX P 18 38 47.00 S 1 59.90 PBX P 18 38 49.60 S 1 63.70 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870411 1156 5.99 31-43.75 116-00.76 15.00* 6 230 64.0 0.27 1.8 2.3 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD ENX P 11 56 16.50 S 1 23.70 PBX P 11 56 16.90 CBX P 11 56 20.30 S 1 31.20 2.3 CPBX P 11 56 21.70 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870414 4 5 43.28 31-45.13 116-10.41 15.00* 9 129 48.7 0.28 1.7 3.1 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD ENX P 4 5 51.42 S 1 57.67 3.2 PBX P 4 5 52.24 S 1 58.29 2.8 CBX P 4 5 55.42 S 1 64.64 2.8 3.1 SPX P 4 5 59.62 S 1 71.71 CPBX P 4 6 2.08 S 1 14.16 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870416 1919 48.27 32-33.25 115-19.26 10.00* 6 338 129.0 0.24 6.2 2.5 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD CBX P 19 20 8.45 S 1 23.81 2.5 2.5 ENX P 19 20 10.80 S 1 29.24 PBX P 19 20 13.06 S 1 31.91 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870420 1859 7.34 32-13.34 115-03.18 8.00* 6 338 152.0 0.40 5.8 3.5 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD CBX P 18 59 31.10 S 1 48.90 3.4 3.5 ENX P 18 59 31.70 S 1 51.30 3.6 PBX P 18 59 32.80 S 1 52.60 3.3 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870421 945 52.81 31-49.13 116-15.38 8.00* 8 206 39.3 0.14 0.9 3.0 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD ENX P 9 45 59.20 S 1 64.40 PBX P 9 46 0.20 S 1 5.90 CBX P 9 46 3.21 S 1 11.80 3.0 CPBX P 9 46 10.10 S 1 24.20 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870423 4 8 36.42 31-59.50 116-28.13 10.00* 6 248 22.1 0.10 1.3 2.6 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD ENX P 4 8 40.30 S 1 43.80 2.4 CBX P 4 8 42.10 S 1 47.90 2.2 2.6 PBX P 4 8 42.43 S 1 47.75 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870427 1741 24.88 33- 7.35 115-42.11 8.00* 6 347 127.2 0.15 3.4 3.5 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD CBX P 17 41 44.68 S 1 60.04 3.7 3.5 ENX P 17 41 50.06 S 1 70.03 3.9 PBX P 17 41 53.00 S 1 74.50 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870429 640 59.89 31-58.95 116-23.02 4.00* 6 266 28.8 0.06 0.9 1.8 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD ENX P 6 41 4.85 S 1 8.75 PBX P 6 41 6.80 S 1 12.10 CBX P 6 41 7.34 S 1 13.04 1.8 DATE ORIGIN LAT N LONG W DEPTH NO GAP DMIN RMS ERH ERZ MAG 870429 1232 0.70 32-42.44 116- 0.70 15.00* 8 241 73.8 0.24 3.0 3.1 STATION PHASE TIME OF P PHASE TIME OF S MLR MLD CPBX P 12 32 12.22 S 1 21.90 CBX P 12 32 12.68 S 1 22.21 2.8 3.1 ENX P 12 32 17.75 S 1 30.96 3.2 PBX P 12 32 20.67 S 1 35.73 3.1 SPX P 4 12 32 30.96 S 4 52.94