Phase Data
21 MAY 2012 (142)
ot = 08:39:34.26 +/- 1.60 TONGA REGION
lat = -23.308 +/- 13.6
lon = -175.648 +/- 15.7 MAGNITUDE 4.6 (GS)
dep = 165.0 +/- 9.8
245 km (152 miles) S of NUKU`ALOFA, Tonga
431 km (268 miles) SE of Ndoi Island, Fiji
544 km (338 miles) SSW of Neiafu, Tonga
1762 km (1094 miles) NE of Auckland, New Zealand
nph = 14 of 14 se = 0.79 FE=174 A
error ellipse = (306.0, 4.0, 27.7; 36.0, 2.0, 16.5;160.0, 84.0, 14.8)
mb = 4.6 ( 9) 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
MSVF ePn 08:41:32.30 3.4 8.1 312 MSVF
AFI ePn 08:41:58.16 3.4 10.0 22 AFI
RAR ePn 08:42:49.26 -6.9 14.8 85 RAR
DZM eP 08:43:17.20 0.2 16.6 271 b:2.7+1 .90 4.6 DZM
AS01 eP 08:47:40.85 -0.8 46.0 259 AS01
AS31 eP 08:47:42.23 0.3 46.1 259 b:2.1+0 1.1 3.6 AS31
WB2 eP 08:47:44.68 0.0 46.4 264 b:3.9+1 1.9 4.6 WB2
eP 08:47:44.70 0.0
MLOA eP 08:47:48.52 0.0 46.9 26 b:2.3+2 1.5 5.5 MLOA
VNDA eP 08:48:53.47 3.1 55.3 186 b:4.1+1 .60 5.4 VNDA
QSPA eP 08:50:06.37 -1.4 66.8 180 b:1.7+1 1.2 4.7 QSPA
MAW eP 08:51:22.70 -0.3 79.7 199 b:3.0+0 1.4 3.8 MAW
SNAA eP 08:51:51.34 -0.2 85.1 178 b:8.9+0 1.2 4.4 SNAA
TMUT eP 08:52:00.28 1.0 86.6 45 b:6.8+0 .86 4.5 TMUT
Generated 2012 MAY 21 at 09:09 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
