Phase Data
21 OCT 2011 (294)
ot = 14:56:05.33 +/- 1.25 TONGA
lat = -21.107 +/- 29.3
lon = -175.602 +/- 33.8 MAGNITUDE 4.9 (GS)
dep = 191.6 +/- 26.7
42 km (26 miles) W of NUKU`ALOFA, Tonga (pop 37,000)
320 km (199 miles) SSW of Neiafu, Tonga
326 km (203 miles) E of Ndoi Island, Fiji
1980 km (1229 miles) NNE of Auckland, New Zealand
nph = 17 of 17 se = 0.62 FE=173 B
error ellipse = ( 54.0, 32.0, 71.0;149.0, 8.0, 33.1;253.0, 56.0, 16.8)
mb = 4.9 ( 11) 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 14:57:42.44 -1.3 6.9 298 MSVF
DZM eP 14:59:50.28 2.3 16.7 263 b:5.3+1 1.0 4.9 DZM
URZ eP 14:59:59.48 -4.5 18.2 199 b:2.2+1 .48 4.8 URZ
THZ eP 15:00:48.75 -2.5 22.8 203 b:2.3+1 .76 4.8 THZ
LTZ eP 15:01:01.62 0.2 23.9 202 b:2.9+1 .72 5.0 LTZ
OXZ eP 15:01:04.17 -2.3 24.4 202 b:4.1+1 .60 5.2 OXZ
RPZ eP 15:01:13.12 0.4 25.1 203 b:2.3+1 .78 4.9 RPZ
FOZ eP 15:01:16.47 0.9 25.5 205 b:4.3+1 .62 5.3 FOZ
WHZ eP 15:01:41.06 1.4 28.2 205 b:1.6+1 .68 4.9 WHZ
ARMA eP 15:02:03.74 0.0 30.8 246 b:3.4+1 1.5 4.8 ARMA
PMG eP 15:03:02.18 -0.2 37.7 282 b:4.2+1 .90 5.1 PMG
STKA eP 15:03:18.10 0.2 39.6 245 b:1.8+0 .60 3.8 STKA
AS31 eP 15:04:13.72 -0.6 46.6 257 AS31
WRAB eP 15:04:15.08 -0.4 46.7 262 WRAB
WB2 eP 15:04:15.55 0.0 46.7 262 WB2
FORT eP 15:04:48.79 0.0 51.1 247 FORT
MTN eP 15:04:50.92 -0.2 51.4 270 MTN
Generated 2011 OCT 21 at 15:10 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
