M 6.9 - 6 km ENE of Rizo de Oro, Mexico

Slight damage at Tuxtla Gutierrez, Mexico. Felt at Coban, Guatemala City, Quezaltenango and San Marcos, Guatemala. Also felt at Mexico City, Mexico and (II) at San Salvador, El Salvador. Depth from broadband displacement seismograms. FAULT PLANE SOLUTION: P-Waves NP1:Strike=140 Dip=77 Slip=85 NP2:Strike=341 Dip=14 Slip=111 Principal Axes: (T) Plg=58 Azm=43 (P) Plg=32 Azm=234 Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting with a small left-lateral strike-slip component. The preferred fault plane is NP2. RADIATED ENERGY No. of sta: 13 Focal mech. F Energy 2.3+0.6*10**13 Nm MOMENT TENSOR SOLUTION Dep 169 No. of sta: 29 Moment Tensor; Scale 10**19 Nm Mrr=0.63 Mtt=-1.64 Mff=1.01 Mrt=0.70 Mrf=-1.52 Mtf=0.85 Principal axes: (T) Val=2.36 Plg=40 Azm=94 (N) Val=0.00 Plg=41 Azm=316 (P) Val=-2.36 Plg=23 Azm=205 Best Double Couple:Mo=2.4*10**19 NP1:Strike=247 Dip=43 Slip=15 NP2:Strike=146 Dip=80 Slip=132 CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 54S,140C M.W.: 54S,129C Centroid Location: Origin Time 20:51:32.5 0.1 Lat 15.98N 0.01 Lon 92.64W 0.01 Dep 167.6 0.4 Half-duration 6.9 Moment Tensor; Scale 10**19 Nm Mrr=0.51 0.01 Mtt=-1.31 0.01 Mff=0.80 0.01 Mrt=0.99 0.01 Mrf=-1.71 0.01 Mtf=0.07 0.01 Principal Axes: (T) Val=2.48 Plg=44 Azm=76 (N) Val=-0.45 Plg=29 Azm=314 (P) Val=-2.03 Plg=32 Azm=204 Best Double Couple:Mo=2.2*10**19 NP1:Strike=239 Dip=30 Slip=13 NP2:Strike=138 Dip=84 Slip=119