M 7.1 - 0 km ESE of Union, Philippines

  • 1990-06-14 07:40:56 (UTC)
  • 11.760°N 121.899°E
  • 18.1 km depth

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At least four people killed, 15 injured in the Culasi area. Considerable damage in other parts of Panay. Felt (VI RF) at Iloilo; (V RF) at Bacolod, Negros and on Cebu; (III RF) on Camiguin; (II RF) at Sorsogon and (I RF) at Manila, Luzon. Depth from broadband displacement seismograms. FAULT PLANE SOLUTION: P-Waves NP1:Strike=28 Dip=88 Slip=-180 NP2:Strike=118 Dip=90 Slip=-358 Principal Axes: (T) Plg=1 Azm=343 (P) Plg=1 Azm=253 Comment: The focal mechanism is poorly controlled and corresponds to strike-slip faulting. The preferred fault plane is not determined. MOMENT TENSOR SOLUTION Dep 20 No. of sta: 8 Moment Tensor; Scale 10**19 Nm Mrr=0.46 Mtt=3.29 Mff=-3.74 Mrt=-0.17 Mrf=0.55 Mtf=0.55 Principal axes: (T) Val=3.34 Plg=3 Azm=176 (N) Val=0.52 Plg=82 Azm=285 (P) Val=-3.86 Plg=7 Azm=85 Best Double Couple:Mo=3.6*10**19 NP1:Strike=221 Dip=83 Slip=-177 NP2:Strike=130 Dip=87 Slip=-7 CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 11S, 32C M.W.: 12S, 30C Centroid Location: Origin Time 07:41: 8.1 0.2 Lat 11.70N 0.01 Lon 121.86E 0.02 Dep 15.0 FIX Half-duration 15.0 Moment Tensor; Scale 10**19 Nm Mrr=-0.83 0.04 Mtt=4.92 0.04 Mff=-4.09 0.04 Mrt=-0.13 0.33 Mrf=1.07 0.34 Mtf=0.31 0.03 Principal Axes: (T) Val=4.94 Plg=1 Azm=178 (N) Val=-0.51 Plg=73 Azm=271 (P) Val=-4.42 Plg=17 Azm=88 Best Double Couple:Mo=4.7*10**19 NP1:Strike=224 Dip=78 Slip=-169 NP2:Strike=132 Dip=79 Slip=-13

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