4 APR 2009 ( 94)
ot = 11:59:37.43 +/- 0.28 TONGA REGION
lat = -22.558 +/- 7.3
lon = -174.712 +/- 6.0 MAGNITUDE 5.2 (GS)
dep = 35.0 (geophysicist)
165 km (100 miles) SSE of NUKU'ALOFA, Tonga
440 km (275 miles) S of Neiafu, Tonga
465 km (290 miles) ESE of Ndoi Island, Fiji
1875 km (1170 miles) NE of Auckland, New Zealand
nph = 55 of 66 se = 0.98 FE=174 A
error ellipse = (152.6, 0.0, 10.1; 62.6, 0.0, 7.0; 0.0, 0.0, 0.0)
mb = 5.2 ( 30) ML = 0.0 ( 0) mblg = 4.3 ( 2) md = 0.0 ( 0) MS = 0.0 ( 0)
sta phase arrival res dist azm amp per mag amp per mag sta
AFI ePn 12:01:37.12 -8.5X 9.0 18 d:3.6+1 5.8X L:1.4-1 .60 4.7X AFI
eSn 12:03:07.48 S res = -18.8X g:1.4-1 .95 4.1 b:7.8+1 .60 6.0X
MSVF qPn 12:01:37.21 1.5 8.3 304 MSVF
RAR ePn 12:02:42.21 -10.2X 13.9 87 g:2.2-1 .85 4.6 RAR
eSn 12:04:59.56 S res = -26.4X
URZ ePn 12:03:33.88 -0.5 17.2 202 b:2.3+1 .92 4.3 URZ
eSn 12:06:34.14 S res = -9.9X
DZM qPn 12:03:36.50 -1.7 17.4 268 DZM
HNR qP 12:05:23.87 2.4 27.6 294 HNR
ARMA eP 12:05:53.89 1.6 31.0 248 b:2.9+2 2.5 5.6 ARMA
EIDS eP 12:05:55.24 0.5 31.3 258 b:2.3+2 2.7 5.5 EIDS
CAN eP 12:06:18.14 -0.1 34.0 240 b:1.9+1 1.0 5.0 CAN
CTAO eP 12:06:37.88 -0.7 36.4 266 b:3.7+1 1.5 5.1 CTAO
PMG eP 12:06:57.94 -1.1 38.8 283 b:5.3+1 1.3 5.2 PMG
STKA eP 12:07:06.72 0.0 39.7 247 b:2.7+0 1.2 3.9X STKA
COEN eP 12:07:15.32 -0.3 40.8 275 b:2.1+2 .95 5.9 COEN
AS31 eP 12:08:04.97 -1.1 47.1 258 AS31
WRAB eP 12:08:06.60 -1.8 47.4 263 b:1.9+1 .90 5.1 WRAB
FITZ eP 12:09:10.48 -1.0 55.8 263 b:2.0+1 1.0 5.1 FITZ
VNDA eP 12:09:15.80 2.6 56.2 186 b:7.5+1 2.5 5.3 VNDA
MBWA eP 12:09:43.28 -0.4 60.4 258 b:1.4+1 .90 5.1 MBWA
QSPA eP 12:10:30.63 0.7 67.5 180 b:2.8+1 1.2 5.2 QSPA
MAJO eP 12:11:08.39 0.7 73.7 322 b:4.0+1 1.4 5.2 MAJO
KSM eP 12:11:25.51 -0.1 76.7 277 b:2.8+1 1.0 5.2 KSM
ASAJ eP 12:11:26.99 0.4 77.0 330 b:1.2+1 1.0 4.9 ASAJ
TPUB eP 12:11:29.06 -1.7 77.7 302 b:2.5+1 .88 5.3 TPUB
ISA eP 12:11:36.99 1.0 78.6 44 b:2.5+1 1.6 5.0 ISA
YSS eP 12:11:38.95 0.8 79.1 332 b:5.4+1 1.2 5.4 YSS
MAW eP 12:11:47.48 1.2 80.7 199 MAW
INCN eP 12:11:51.47 1.4 81.3 317 INCN
CCUT eP 12:11:59.90 0.2 83.1 45 CCUT
MSU eP 12:12:07.00 0.5 84.4 44 MSU
HAWA eP 12:12:08.47 0.2 84.8 35 HAWA
MFID eP 12:12:08.67 -0.7 85.0 39 b:1.8+1 1.4 5.0 MFID
LAZ eP 12:12:12.55 0.0 85.6 50 b:2.6+0 1.3 4.3 LAZ
LPM eP 12:12:13.00 -1.1 85.9 50 b:1.8+1 1.4 5.1 LPM
SNAA eP 12:12:13.07 -0.1 85.9 177 b:2.1+1 1.3 5.2 SNAA
SRU eP 12:12:13.11 -0.3 85.8 45 b:4.4+2 1.2 6.5X SRU
HLID eP 12:12:14.10 0.1 85.9 39 HLID
GAMB eP 12:12:14.44 0.5 86.1 1 b:2.0+1 .94 5.3 GAMB
IPM eP 12:12:17.75 0.6 86.5 276 b:2.5+1 .85 5.5 IPM
COLA eP 12:12:30.27 -0.5 89.6 11 b:1.3+1 1.1 5.1 COLA
BILL eP 12:12:39.21 -0.1 91.4 353 b:8.5+0 1.2 5.0 BILL
CHTO eP 12:12:48.28 -3.2X 93.8 289 b:1.9+1 1.3 5.4 CHTO
JTS eP 12:12:49.25 -1.7 93.7 80 b:1.0+1 1.0 5.2 JTS
CM31 eP 12:12:51.33 0.4 93.7 288 b:8.2+0 .75 5.2 CM31
DGMT eP 12:12:54.19 -0.1 94.6 39 b:1.9+1 1.0 5.4 DGMT
KKAR ePKPdf 12:18:29.54 -0.5 122.9 308 KKAR
SUW ePKPbc 12:19:12.80 0.2 145.8 341 SUW
AK01 ePKPbc 12:19:13.48 -0.6 146.3 332 AK01
KIEV ePKPbc 12:19:13.54 -0.6 146.3 332 KIEV
AK02 ePKPbc 12:19:13.55 -0.7 146.3 332 AK02
MALT ePKPbc 12:19:19.67 1.2 147.6 307 MALT
PSZ ePKPdf 12:19:21.15 -1.4 152.1 339 PSZ
KHC ePKPdf 12:19:22.16 -1.1 152.7 348 KHC
ePKPbc 12:19:30.99 0.7X
ePKPab 12:19:41.94 0.9X
STU ePKPdf 12:19:24.59 -0.1 153.7 354 STU
ePKPbc 12:19:33.04 0.6X
ePKPab 12:19:43.99 -1.1X
BUR08ePKPbc 12:19:25.58 0.6 150.3 332 BUR0
BR131ePKPbc 12:19:25.62 -0.1 150.5 312 BR13
TIRR ePKPbc 12:19:27.15 0.5 151.0 324 TIRR
ePKPab 12:19:35.35 1.1X
MORC ePKPbc 12:19:27.33 0.4 151.2 343 MORC
BFO ePKPbc 12:19:33.61 0.0 154.2 355 BFO
Generated 2009 APR 8 at 10:20 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
