5 APR 2009 ( 95)
ot = 08:14:28.97 +/- 0.25 TONGA REGION
lat = -22.520 +/- 7.4
lon = -174.865 +/- 6.0 MAGNITUDE 5.0 (GS)
dep = 35.0 (geophysicist)
155 km (95 miles) SSE of NUKU'ALOFA, Tonga (pop 37,000)
440 km (270 miles) SSW of Neiafu, Tonga
450 km (280 miles) ESE of Ndoi Island, Fiji
1875 km (1170 miles) NE of Auckland, New Zealand
nph = 63 of 79 se = 1.06 FE=174 A
error ellipse = (147.7, 0.0, 10.7; 57.7, 0.0, 6.4; 0.0, 0.0, 0.0)
mb = 5.0 ( 46) 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
MSVF ePn 08:16:30.03 4.7 8.2 304 g:1.0-2 1.1 2.8X MSVF
AFI ePn 08:16:31.60 -5.7X 9.1 19 AFI
eSn 08:18:03.55 S res = -14.5X
RAR ePn 08:17:33.69 -12.2X 14.1 88 g:1.5-1 1.1 4.3 RAR
DZM ePn 08:18:20.32 -7.7X 17.3 268 g:1.1-1 1.1 4.3 b:1.1+2 1.1 4.9 DZM
URZ ePn 08:18:25.40 -0.3 17.1 202 b:1.5+1 .72 4.2 URZ
eSn 08:21:16.57 S res = -18.5X
SNZO eP 08:19:06.68 0.7 20.7 203 b:2.0+1 .69 4.6 SNZO
EIDS eP 08:20:44.94 -0.2 31.2 258 b:1.9+1 1.1 4.8 EIDS
CTAO eP 08:21:28.38 -0.6 36.2 266 b:3.8+1 1.4 5.1 CTAO
PMG eP 08:21:47.88 -1.5 38.6 284 b:5.8+1 1.2 5.3 PMG
STKA eP 08:21:56.97 -0.3 39.6 247 b:4.3+0 1.3 4.0 STKA
COEN eP 08:22:05.03 -0.9 40.6 275 b:2.4+2 1.0 5.9 COEN
AS31 eP 08:22:55.05 -1.5 46.9 258 AS31
WRAB eP 08:22:56.46 -2.4 47.2 263 b:1.8+1 1.0 5.0 WRAB
FORT eP 08:23:28.08 -1.1 51.2 248 b:2.4+1 .60 5.3 FORT
FITZ eP 08:24:00.90 -1.2 55.7 263 b:2.8+1 1.1 5.2 FITZ
VNDA eP 08:24:06.31 1.4 56.2 186 b:2.4+1 1.8 4.9 VNDA
SBA eP 08:24:06.43 2.3 56.1 185 b:5.5+1 1.7 5.3 SBA
MBWA eP 08:24:35.02 0.7 60.3 258 b:1.4+1 .90 5.1 MBWA
QSPA eP 08:25:22.63 0.9 67.6 180 b:3.2+1 1.4 5.2 QSPA
JNU eP 08:26:10.08 -1.2 75.7 315 b:9.2+0 1.3 4.6 JNU
PTRM eP 08:26:14.11 -7.6X 77.6 43 PTRM
KSM eP 08:26:16.21 -0.2 76.6 277 b:1.9+1 1.0 5.1 KSM
SAO qP 08:26:25.84 4.5X 77.5 41 b:7.2+0 1.0 4.6 SAO
ISA eP 08:26:28.17 0.3 78.7 44 b:1.2+1 1.3 4.7 ISA
PEA0BeP 08:26:28.35 -0.5 79.0 344 PEA0
YSS eP 08:26:29.15 0.0 79.0 332 b:2.2+1 .85 5.2 YSS
CMB eP 08:26:29.56 0.1 79.0 41 CMB
GSC eP 08:26:32.57 0.0 79.6 45 GSC
MTUM eP 08:26:34.01 0.6 79.7 42 MTUM
YBH eP 08:26:35.78 0.5 80.1 37 b:8.3+0 1.2 4.6 YBH
LDFC eP 08:26:36.52 -1.5 80.6 46 b:2.1+0 .40 4.5 LDFC
WCN eP 08:26:37.24 1.2 80.2 40 b:8.3+1 2.8 5.2 WCN
HUMO eP 08:26:38.39 0.8 80.5 36 b:1.2+1 1.2 4.7 HUMO
TUC eP 08:26:45.90 0.4 82.0 50 b:2.2+1 2.1 4.8 TUC
CCUT eP 08:26:51.97 0.3 83.1 45 b:1.8+1 1.6 4.9 CCUT
ARUT eP 08:26:52.06 0.1 83.2 44 b:1.2+1 1.2 4.9 ARUT
ELK eP 08:26:55.39 0.3 83.8 41 b:6.5+0 1.0 4.7 ELK
epP 08:27:03.56 depth = 25.7X
MVU eP 08:26:58.52 0.3 84.4 44 MVU
MSU eP 08:26:58.86 0.5 84.5 44 MSU
HAWA eP 08:27:00.80 0.7 84.9 35 b:4.2+1 1.8 5.3 HAWA
BMO eP 08:27:01.15 -0.2 85.1 37 b:2.0+1 1.8 5.0 BMO
MFID eP 08:27:01.22 0.0 85.1 39 b:8.4+0 1.1 4.8 MFID
MNTX eP 08:27:02.10 -1.8 85.6 53 b:8.7+0 1.4 4.8 MNTX
LAZ eP 08:27:03.44 -1.1 85.7 50 b:6.6+0 1.3 4.7 LAZ
TMUT eP 08:27:04.65 0.9 85.5 44 b:2.0+1 1.1 5.2 TMUT
SNAA eP 08:27:05.03 0.1 85.9 177 b:1.9+1 1.4 5.1 SNAA
BNM eP 08:27:05.55 -0.2 85.9 51 b:3.4+1 1.9 5.2 BNM
SRU eP 08:27:05.63 0.3 85.9 45 b:4.0+2 1.2 6.5X SRU
LPM eP 08:27:06.13 0.1 86.0 50 LPM
HLID eP 08:27:06.19 0.3 86.0 39 b:4.6+0 1.2 4.6 HLID
epP 08:27:22.81 depth = 58.5X
JLU eP 08:27:06.62 0.1 86.1 43 b:4.2+1 2.4 5.2 JLU
ANMO eP 08:27:07.35 -0.9 86.4 50 b:3.4+1 2.0 5.2 ANMO
GDL2 eP 08:27:08.25 -0.7 86.6 53 GDL2
IPM eP 08:27:08.66 0.7 86.3 276 b:3.9+1 1.2 5.5 IPM
KULM eP 08:27:11.96 1.0 86.9 277 b:3.3+1 1.3 5.4 KULM
IMW eP 08:27:15.77 -1.2 88.2 41 IMW
SMCO eP 08:27:16.81 -0.3 88.2 46 b:4.4+0 1.1 4.7 SMCO
CHMT eP 08:27:18.08 -0.4 88.6 37 CHMT
GCMT qP 08:27:25.60 0.5 90.0 39 b:6.9-1 .72 4.0 GCMT
RSSD eP 08:27:36.88 -0.3 92.6 43 RSSD
JTS eP 08:27:43.20 0.1 93.8 81 b:1.3+1 1.1 5.3 JTS
epP 08:27:49.75 depth = 20.4X
CHTO eP 08:27:44.13 1.8 93.7 289 b:3.1+1 1.5 5.5 CHTO
ECSD eP 08:27:57.47 -0.6 97.2 46 b:3.8+1 2.0 5.6 ECSD
KKAR ePKPdf 08:33:20.48 -0.8 122.8 308 KKAR
ABKARePKPdf 08:33:33.67 -0.3 129.6 316 ABKA
SUW ePKPbc 08:34:03.47 0.0 145.7 341 SUW
KIEV ePKPbc 08:34:04.46 0.1 146.2 332 KIEV
MALT ePKPbc 08:34:10.52 3.4X 147.5 307 MALT
KHC ePKPdf 08:34:14.24 -0.5 152.6 348 KHC
ePKPab 08:34:32.87 0.6X
BR131ePKPbc 08:34:16.73 5.0X 150.4 312 BR13
BUR08ePKPbc 08:34:17.19 6.0X 150.2 332 BUR0
MORC ePKPbc 08:34:18.26 5.8X 151.1 343 MORC
CSS ePKPbc 08:34:22.70 7.8X 152.4 303 CSS
Generated 2009 APR 8 at 12:49 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
