M 7.7 - 4 km E of Macapsing, Philippines

At least 1,621 people killed, more than 3,000 people injured and severe damage, landslides, liquefaction, subsidence, and sandblows in the Baguio-Cabanatuan-Dagupan area. Damage also occurred in Bataan Province and at Manila. Large fissures were observed in the epicentral area. Surface faulting occurred along the Philippine and Digdig faults. Felt (VII RF) in the Manila area, (VI RF) at Santa, (V RF) at Cubi Point and (IV RF) at Callao Caves. FAULT PLANE SOLUTION: P-Waves NP1:Strike=167 Dip=69 Slip=18 NP2:Strike=70 Dip=73 Slip=158 Principal Axes: (T) Plg=27 Azm=28 (P) Plg=3 Azm=119 Comment: The focal mechanism is moderately well controlled and corresponds to strike-slip faulting with a moderate reverse component. The preferred fault plane is NP1. RADIATED ENERGY No. of sta: 4 Focal mech. F Energy 2.4+0.7*10**15 Nm CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 10S, 29C M.W.: 15S, 41C Centroid Location: Origin Time 07:26:52.8 0.2 Lat 15.97N 0.01 Lon 121.23E 0.01 Dep 15.0 FIX Half-duration 20.0 Moment Tensor; Scale 10**20 Nm Mrr=-0.28 0.04 Mtt=3.40 0.03 Mff=-3.12 0.03 Mrt=-0.27 0.22 Mrf=0.20 0.24 Mtf=-2.41 0.03 Principal Axes: (T) Val=4.22 Plg=4 Azm=198 (N) Val=-0.30 Plg=86 Azm=355 (P) Val=-3.92 Plg=2 Azm=108 Best Double Couple:Mo=4.1*10**20 NP1:Strike=243 Dip=86 Slip=178 NP2:Strike=333 Dip=88 Slip=4