Phase Data
4 JAN 2012 ( 4)
ot = 18:04:30.44 +/- 3.76 TONGA REGION
lat = -17.785 +/- 25.3
lon = -171.161 +/- 18.0 MAGNITUDE 4.9 (GS)
dep = 20.5 +/- 7.9
194 km (121 miles) NW of Niue Island
313 km (195 miles) ENE of Neiafu, Tonga
563 km (349 miles) NE of NUKU`ALOFA, Tonga
2524 km (1567 miles) NE of Auckland, New Zealand
nph = 10 of 10 se = 1.86 FE=174 B
error ellipse = (148.0, 10.0, 45.4; 53.0, 24.0, 20.5;260.0, 63.0, 2.8)
mb = 4.9 ( 5) ML = 0.0 ( 0) mblg = 0.0 ( 0) md = 0.0 ( 0) MS = 0.0 ( 0)
sta phase arrival res dist azm amp per mag amp per mag sta
AFI ePn 18:05:28.36 -0.9 3.9 351 AFI
DZM eP 18:09:14.82 -3.1 21.5 255 b:8.1+1 1.2 5.0 DZM
CTAO eP 18:12:08.22 1.9 40.3 260 b:4.3+1 1.9 4.8 CTAO
WB2 eP 18:13:32.00 -2.5 51.4 258 WB2
AS01 eP 18:13:35.10 0.7 51.4 254 AS01
AS31 eP 18:13:35.72 1.0 51.5 254 b:3.7+0 .65 4.4 AS31
SOEI eP 18:14:58.90 2.5 63.0 268 b:4.9+1 1.0 5.6 SOEI
MYLDMeP 18:15:58.76 -0.7 73.0 281 b:2.6+1 1.1 5.2 MYLD
B941 eP 18:16:26.31 -1.1 78.0 32 B941
CM01 eP 18:17:55.24 1.4 95.4 287 CM01
Generated 2012 JAN 4 at 18:54 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
