21 MAR 2009 ( 80)
ot = 01:27:57.41 +/- 0.27 TONGA REGION
lat = -23.660 +/- 9.8
lon = -175.298 +/- 5.7 MAGNITUDE 5.1 (GS)
dep = 35.0 (geophysicist)
280 km (175 miles) S of NUKU'ALOFA, Tonga
485 km (300 miles) SE of Ndoi Island, Fiji
570 km (355 miles) SSW of Neiafu, Tonga
1740 km (1080 miles) NE of Auckland, New Zealand
nph = 54 of 57 se = 0.80 FE=174 A
error ellipse = (164.1, 0.0, 13.2; 74.1, 0.0, 6.8; 0.0, 0.0, 0.0)
mb = 4.9 ( 23) ML = 0.0 ( 0) mblg = 4.0 ( 1) md = 0.0 ( 0) MS = 0.0 ( 0)
sta phase arrival res dist azm amp per mag amp per mag sta
MSVF ePn 01:30:00.52 1.4 8.6 312 d:1.1+2 6.6X L:1.6-1 .80 4.7X MSVF
g:1.2-1 .85 4.0 b:1.0+2 .80 6.0X
CTAO eP 01:34:53.50 0.0 35.8 268 b:1.3+1 .60 5.0 CTAO
COEN eP 01:35:31.62 -0.4 40.4 276 b:4.5+1 .99 5.2 COEN
AS31 eP 01:36:20.78 0.6 46.3 259 AS31
WRAB eP 01:36:22.29 -1.0 46.7 264 b:1.1+1 .70 4.9 WRAB
FORT eP 01:36:51.28 -0.4 50.4 249 b:1.6+1 .57 5.2 FORT
FITZ eP 01:37:26.35 -0.3 55.1 264 b:8.3+0 .80 4.8 FITZ
MBWA eP 01:37:58.03 -0.5 59.6 259 b:1.5+1 1.0 5.0 MBWA
YSS eP 01:40:01.99 0.0 79.8 332 b:4.2+1 .97 5.4 YSS
CMB eP 01:40:04.01 0.1 80.1 41 b:6.4+0 1.0 4.5 CMB
NV11 eP 01:40:12.06 -0.6 81.7 42 NV11
MOD eP 01:40:16.94 -0.6 82.7 38 b:3.7+1 1.9 5.1 MOD
TUC eP 01:40:19.26 -0.1 83.0 50 b:2.1+0 .92 4.2 TUC
CCUT eP 01:40:26.16 0.5 84.2 45 CCUT
ELK eP 01:40:28.65 -0.5 84.9 41 ELK
SNAA eP 01:40:29.20 1.4 84.8 178 b:2.2+0 .90 4.3 SNAA
PLCA eP 01:40:32.20 1.2 85.3 132 b:3.0+1 1.9 5.2 PLCA
MVU eP 01:40:32.61 0.5 85.5 45 MVU
MSU eP 01:40:33.38 1.1 85.5 45 MSU
MFID eP 01:40:35.37 0.1 86.2 39 MFID
IPM eP 01:40:35.66 0.6 86.0 277 b:1.3+1 .69 5.3 IPM
TMUT eP 01:40:38.34 0.7 86.6 44 b:7.8+0 .94 4.9 TMUT
KULM eP 01:40:38.78 0.7 86.7 277 b:7.5+0 .63 5.1 KULM
SRU eP 01:40:39.39 0.3 86.9 45 SRU
HLID eP 01:40:40.32 0.5 87.1 39 b:2.1+0 1.0 4.3 HLID
ANMO eP 01:40:41.49 -0.2 87.5 50 b:7.8+0 1.5 4.7 ANMO
GDL2 eP 01:40:42.73 0.5 87.6 53 GDL2
TPAW eP 01:40:49.58 0.1 89.1 41 b:2.1+0 1.0 4.4 TPAW
SMCO eP 01:40:51.11 0.5 89.3 46 SMCO
MOOW eP 01:40:51.35 0.7 89.4 41 b:7.6+0 1.8 4.7 MOOW
RSSD eP 01:41:10.11 -0.6 93.7 43 b:3.9+0 1.0 4.8 RSSD
CM31 eP 01:41:11.28 1.2 93.5 288 b:1.4+1 .98 5.4 CM31
CHTO eP 01:41:12.62 1.9 93.7 289 b:9.6+0 .80 5.3 CHTO
YKW3 eP 01:41:29.09 -2.0 98.4 24 b:2.4-2 .77 2.8X YKW3
ULN eP 01:41:36.64 0.4 99.4 318 b:9.0-1 .55 4.5 ULN
MK31 ePKPdf 01:46:34.05 -0.9 115.2 312 MK31
KURK ePKPdf 01:46:39.35 -0.8 118.0 316 KURK
BRVK ePKPdf 01:46:49.30 -0.7 123.2 319 BRVK
KBL ePKPdf 01:46:52.00 0.3 123.6 297 KBL
BOSA ePKPdf 01:46:52.27 -1.2 124.4 202 BOSA
ARU ePKPdf 01:47:01.46 0.0 129.2 325 ARU
NAO01ePKPdf 01:47:25.92 -0.3 142.6 355 NAO0
GNI ePKPdf 01:47:26.41 -0.7 142.6 306 GNI
KIV ePKPdf 01:47:28.15 0.7 142.9 312 KIV
KIEV ePKPbc 01:47:34.70 -1.4 147.0 331 KIEV
AK01 ePKPbc 01:47:34.75 -1.4 147.0 331 AK01
AK02 ePKPbc 01:47:35.26 -0.9 147.0 331 AK02
MALT ePKPbc 01:47:39.25 0.3 147.8 305 MALT
CSS ePKPdf 01:47:43.33 -0.4 152.7 301 CSS
ePKPbc 01:47:49.98 -0.8X
PSZ ePKPdf 01:47:43.88 0.2 152.9 337 PSZ
KWP ePKPbc 01:47:45.28 0.1 150.5 336 KWP
BR131ePKPbc 01:47:46.25 -0.2 150.8 310 BR13
BUR08ePKPbc 01:47:47.12 0.5 151.0 331 BUR0
ePKPab 01:47:54.37 0.2X
MORC ePKPbc 01:47:48.23 -0.6 152.1 342 MORC
ePKPab 01:47:58.40 0.1X
Generated 2009 MAR 21 at 03:45 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
