3 APR 2009 ( 93)
ot = 07:30:09.87 +/- 0.22 TONGA REGION
lat = -22.953 +/- 6.1
lon = -174.973 +/- 5.9 MAGNITUDE 5.0 (GS)
dep = 44.7 (depth phases)
200 km (125 miles) S of NUKU'ALOFA, Tonga
460 km (285 miles) SE of Ndoi Island, Fiji
485 km (300 miles) SSW of Neiafu, Tonga
1830 km (1140 miles) NE of Auckland, New Zealand
nph = 38 of 61 se = 0.68 FE=174 A
error ellipse = (137.3, 0.0, 9.7; 47.3, 0.0, 5.4; 0.0, 0.0, 0.0)
mb = 4.8 ( 28) ML = 0.0 ( 0) mblg = 3.6 ( 1) md = 0.0 ( 0) MS = 0.0 ( 0)
sta phase arrival res dist azm amp per mag amp per mag sta
RAO ePn 07:31:47.47 0.3 6.8 202 RAO
MSVF ePn 07:32:13.14 4.6X 8.4 307 d:7.9+1 6.2X L:8.9-2 1.3 4.4X MSVF
g:7.0-2 1.1 3.6 b:1.2+2 1.3 5.7X
URZ eP 07:33:59.91 -0.7 16.7 202 b:6.8+0 .68 3.9 URZ
ARMA eP 07:36:20.05 -0.4 30.7 249 b:6.8+0 .93 4.4 ARMA
EIDS eP 07:36:23.52 0.1 31.0 259 b:6.6+0 .97 4.4 EIDS
CTAO eP 07:37:08.03 0.2 36.1 267 b:2.8+1 .80 5.2 CTAO
epP 07:37:21.43 depth = 50.5
esP 07:37:32.98 7.8X
PMG eP 07:37:29.28 -0.1 38.7 284 b:6.8+1 1.1 5.4 PMG
epP 07:37:41.60 depth = 45.5
esP 07:37:55.08 8.3X
COEN eP 07:37:46.03 0.7 40.6 275 b:3.8+2 2.0 5.8X COEN
epP 07:37:57.63 depth = 41.8
AS31 eP 07:38:34.36 -0.7 46.7 259 AS31
epP 07:38:48.96 depth = 55.7X
esP 07:39:00.65 8.0X
WRAB eP 07:38:36.18 -1.5 47.1 264 b:2.6+1 .95 5.2 WRAB
epP 07:38:49.71 depth = 50.5
esP 07:39:00.29 5.0X
FITZ eP 07:39:40.82 0.0 55.5 263 b:1.9+1 1.2 5.0 FITZ
VNDA eP 07:39:43.06 1.4 55.7 186 b:1.0+1 1.6 4.6 VNDA
epP 07:39:56.32 depth = 47.6
QSPA eP 07:40:59.32 0.5 67.1 180 b:8.2+0 1.0 4.7 QSPA
ASAJ eP 07:42:01.07 2.0 77.2 330 b:5.6+0 1.0 4.5 ASAJ
ISA eP 07:42:09.72 0.0 79.1 44 b:1.1+1 1.3 4.6 ISA
CMB eP 07:42:11.52 0.1 79.4 41 b:1.5+1 1.4 4.7 CMB
WCN eP 07:42:17.81 -0.2 80.6 40 b:1.8+1 1.2 4.9 WCN
TUC eP 07:42:27.39 0.3 82.3 50 b:4.6+0 1.0 4.4 TUC
CCUT eP 07:42:33.58 0.2 83.5 45 b:1.1+1 1.1 4.8 CCUT
epP 07:42:45.82 depth = 40.5
ARUT eP 07:42:33.84 0.1 83.6 44 b:5.3+0 1.0 4.6 ARUT
epP 07:42:46.61 depth = 42.7
ELK eP 07:42:36.47 -0.4 84.2 41 ELK
epP 07:42:50.00 depth = 45.8
MVU eP 07:42:40.20 0.3 84.8 44 b:6.7+0 1.1 4.7 MVU
epP 07:42:53.71 depth = 45.6
MSU eP 07:42:40.67 0.6 84.8 44 b:1.1+1 1.2 4.8 MSU
epP 07:42:53.35 depth = 42.2
SNAA eP 07:42:41.98 -0.6 85.5 178 b:2.1+1 1.3 5.1 SNAA
MFID eP 07:42:42.74 -0.3 85.5 39 b:3.3+0 .93 4.5 MFID
epP 07:42:54.39 depth = 37.8
BMO eP 07:42:42.80 -0.4 85.5 37 b:3.4+0 1.3 4.4 BMO
SRU eP 07:42:46.80 -0.2 86.2 45 b:5.6+2 1.6 6.5X SRU
GAMB eP 07:42:47.93 0.7 86.5 1 b:2.0+1 1.4 5.1 GAMB
ANMO eP 07:42:49.75 0.0 86.8 50 b:7.7+0 1.2 4.8 ANMO
epP 07:43:02.63 depth = 42.8
esP 07:43:18.34 10.3X
GDL2 eP 07:42:50.40 0.0 86.9 53 GDL2
epP 07:43:03.26 depth = 42.7
DOT eP 07:43:02.41 -0.1 89.7 13 b:8.4+0 1.2 4.9 DOT
epP 07:43:15.76 depth = 44.4
esP 07:43:29.02 8.1X
COLA eP 07:43:02.76 -1.3 90.0 11 b:1.4+1 1.2 5.1 COLA
epP 07:43:17.50 depth = 50.1
WALA eP 07:43:03.63 -0.6 89.9 35 b:2.4-1 1.3 3.3X WALA
RSSD eP 07:43:18.00 -0.7 93.0 43 b:4.1+0 1.1 4.8 RSSD
DGMT eP 07:43:27.50 -0.2 95.0 39 b:1.6+1 1.2 5.3 DGMT
ECSD eP 07:43:38.83 -0.7 97.6 46 b:4.0+0 1.2 4.8 ECSD
MALT ePKPbc 07:49:50.30 0.5 147.6 306 MALT
BR131ePKPbc 07:49:57.26 0.1 150.6 311 BR13
BUR08ePKPbc 07:49:57.73 0.9 150.5 332 BUR0
Generated 2009 APR 4 at 09:32 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
