21 APR 2009 (111)
ot = 00:37:39.18 +/- 1.12 BABUYAN ISL REGION, PHILIPPINES
lat = 19.242 +/- 9.7
lon = 121.053 +/- 25.4 MAGNITUDE 4.6 (GS)
dep = 28.1 +/- 27.4
120 km (75 miles) NNE of Laoag, Luzon, Philippines (pop 94,000)
165 km (100 miles) SW of Basco, Batan Islands, Philippines
510 km (320 miles) N of MANILA, Philippines
650 km (405 miles) S of T'AI-PEI, Taiwan
nph = 15 of 15 se = 0.55 FE=248 B
error ellipse = (105.0, 46.0, 48.8;292.0, 43.0, 32.0;199.0, 3.0, 8.9)
mb = 4.6 ( 5) ML = 4.0 ( 14) mblg = 3.5 ( 11) md = 0.0 ( 0) MS = 0.0 ( 0)
sta phase arrival res dist azm amp per mag amp per mag sta
TWG ePn 00:38:32.33 -0.2 3.6 0 L:6.6-1 1.1 4.0 g:2.9-1 1.2 3.9 TWG
TPUB ePn 00:38:39.00 -0.4 4.1 354 L:1.8-1 1.1 3.7 g:6.0-2 .85 3.2 TPUB
YULB ePn 00:38:40.14 -0.4 4.1 3 L:1.1-1 1.2 3.4 g:8.0-2 1.2 3.4 YULB
SSLB ePn 00:38:45.85 0.0 4.5 358 L:3.6-1 1.4 4.1 g:1.8-1 1.3 3.8 SSLB
eSn 00:39:37.60 S res = 0.0
NACB ePn 00:38:52.55 1.1 4.9 5 L:1.0-1 3.4 3.7 g:4.0-2 1.1 3.2 NACB
eSn 00:39:49.08 S res = 1.5
YHNB ePn 00:38:59.27 1.2 5.4 3 L:1.9-1 1.7 4.1 g:7.0-2 1.2 3.5 YHNB
CHTO eP 00:42:19.42 -0.2 20.9 272 CHTO
IPM eP 00:42:57.91 0.9 24.5 235 b:2.4+1 .90 4.8 IPM
ULN eP 00:43:52.07 0.0 30.7 341 b:1.4+1 1.7 4.5 ULN
TKM2 eP 00:45:52.01 0.9 44.8 312 b:1.3+1 1.4 4.6 TKM2
KURK eP 00:45:58.42 -0.6 45.9 323 b:1.1+1 1.2 4.7 KURK
EKS2 eP 00:46:01.59 0.9 46.1 311 EKS2
KKAR eP 00:46:19.54 0.0 48.5 310 KKAR
Generated 2009 APR 21 at 00:50 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
