20 APR 2009 (110)
ot = 20:02:23.65 +/- 0.31 TONGA
lat = -15.304 +/- 7.8
lon = -173.562 +/- 7.4 MAGNITUDE 5.4 (GS)
dep = 10.0 (assigned)
75 km (45 miles) NNE of Hihifo, Tonga (pop 2,000)
255 km (160 miles) SW of APIA, Samoa
670 km (415 miles) NNE of NUKU'ALOFA, Tonga
2655 km (1650 miles) NNE of Auckland, New Zealand
nph = 88 of 101 se = 0.87 FE=173 A
error ellipse = (140.3, 0.0, 11.3; 50.3, 0.0, 8.3; 0.0, 0.0, 0.0)
mb = 5.3 ( 79) ML = 5.5 ( 1) mblg = 4.1 ( 3) md = 0.0 ( 0) MS = 0.0 ( 0)
sta phase arrival res dist azm amp per mag amp per mag sta
AFI eP 20:02:55.43 -5.1X 2.2 52 d:5.3+2 5.4X L:5.3+1 .50 5.5 AFI
eS 20:03:15.71 S res = -12.4X g:1.6+1 .75 5.4X
MSVF eP 20:04:35.02 9.4X 8.4 252 d:1.6+2 6.8X L:9.1-2 .70 4.4X MSVF
g:5.5-2 .70 3.7 b:5.5+1 .70 5.9X
RAR eP 20:05:45.09 -1.9 14.3 116 g:7.9-2 .85 4.2 b:7.2+1 .75 5.4X RAR
URZ eP 20:07:42.75 1.4 24.3 198 g:4.4-2 .98 4.3 b:2.4+1 .64 5.0 URZ
COEN eP 20:10:14.89 0.8 41.8 266 COEN
BBOO eP 20:11:08.14 -0.5 48.7 240 b:2.8+2 1.1 6.2 BBOO
WRAB P 20:11:14.41 -1.9X 49.7 257 b:1.2+1 .85 4.9 WRAB
AS31 P 20:11:15.74 -2.8X 50.0 252 AS31
MBWA qP 20:12:51.12 -1.7 63.2 254 MBWA
AMKA 20:13:16.63 2.1 66.7 355 AMKA
SAO e 20:13:44.51 0.5 71.4 42 b:2.8+1 1.2 5.2 SAO
HOPS P 20:13:46.53 0.6 71.7 39 b:3.3+1 1.1 5.3 HOPS
KIPM P 20:13:48.74 1.1 72.0 38 b:1.1+2 1.7 5.7 KIPM
MWC P 20:13:49.15 0.0 72.2 46 b:2.1+1 1.2 5.1 MWC
CMB eP 20:13:51.59 -1.0 72.8 41 b:8.1+1 1.7 5.5 CMB
ISA P 20:13:52.04 0.0 72.7 44 b:3.0+1 1.3 5.2 ISA
WDC eP 20:13:53.15 -0.5 73.0 38 b:7.9+1 1.6 5.5 WDC
PFO P 20:13:53.87 0.0 73.0 47 b:7.7+1 1.9 5.5 PFO
YBH eP 20:13:55.87 -1.5 73.6 37 b:9.2+1 1.5 5.6 YBH
GSC P 20:13:57.74 0.1 73.6 46 b:3.9+1 1.4 5.3 GSC
DAC P 20:13:58.03 0.3 73.6 44 b:2.9+1 1.5 5.1 DAC
BEKR P 20:13:58.11 -1.1 73.9 40 b:2.6+1 1.3 5.1 BEKR
GLA P 20:13:59.41 0.5 73.8 48 b:3.7+1 1.4 5.2 GLA
WCN P 20:13:59.89 0.4 73.9 41 b:3.7+1 1.3 5.3 WCN
e 20:14:09.92 -4.9X
HUMO P 20:14:00.42 0.8 74.0 36 b:4.9+1 1.3 5.4 HUMO
NV11 P 20:14:01.47 -1.0 74.5 42 NV11
LDFC e 20:14:04.25 0.4 74.7 46 LDFC
MOD P 20:14:04.86 -1.5 75.1 38 b:9.0+1 1.5 5.6 MOD
BMN P 20:14:12.53 0.1 76.2 41 b:1.1+2 1.8 5.7 BMN
WVOR e 20:14:13.95 0.1 76.5 39 b:6.4+1 1.5 5.5 WVOR
ARUT eP 20:14:18.64 0.2 77.2 45 b:6.7+1 1.6 5.5 ARUT
CCUT P 20:14:18.82 0.7 77.2 45 b:6.7+1 1.7 5.4 CCUT
MSU P 20:14:19.15 -6.2X 78.5 45 b:1.0+1 1.1 4.8 MSU
ELK P 20:14:20.11 -0.4 77.6 42 ELK
WUAZ P 20:14:20.75 0.5 77.5 48 b:5.7+1 1.5 5.4 WUAZ
HAWA P 20:14:23.82 0.0 78.3 35 b:9.9+1 1.8 5.6 HAWA
MVU P 20:14:25.08 -0.1 78.4 45 b:5.8+1 1.6 5.4 MVU
BMO P 20:14:25.50 -0.5 78.6 37 b:6.3+1 1.8 5.3 BMO
PMR P 20:14:26.11 -1.6 79.1 12 b:2.0+1 1.2 5.0 PMR
MFID P 20:14:26.22 -0.2 78.7 39 b:2.3+1 1.2 5.1 MFID
DUG P 20:14:27.32 -0.2 78.9 43 b:1.4+1 1.0 4.9 DUG
DIV P 20:14:28.62 -0.8 79.3 13 b:1.9+1 1.0 5.0 DIV
BMRM P 20:14:28.70 -1.3 79.5 14 b:4.8+1 1.3 5.3 BMRM
SML P 20:14:29.68 -0.1 79.4 12 b:1.6+1 2.0 4.7 SML
HLID P 20:14:31.17 -0.5 79.7 39 b:7.0+1 1.6 5.4 HLID
MPU P 20:14:31.74 0.3 79.6 44 b:1.0+1 1.0 4.8 MPU
TMUT P 20:14:31.89 0.7 79.5 44 b:5.5+1 1.3 5.4 TMUT
HVU P 20:14:32.17 0.0 79.7 42 b:6.6+1 1.5 5.4 HVU
SRU P 20:14:33.40 0.4 79.9 45 b:5.8+1 1.5 5.3 SRU
JLU P 20:14:33.51 -0.2 80.0 43 b:4.9+1 1.5 5.2 JLU
e 20:14:45.29 4.2X
TRF P 20:14:33.58 -2.5 80.6 10 b:1.4+1 .94 4.9 TRF
LAZ P 20:14:35.10 0.7 80.1 50 b:2.8+1 1.5 5.0 LAZ
HWUT P 20:14:35.45 -0.5 80.4 42 b:3.9+1 1.5 5.2 HWUT
GDL2 20:14:35.76 -4.9X 81.3 53 GDL2
e 20:14:41.44 0.8X
LENM P 20:14:35.90 1.4 80.1 51 b:1.7+1 1.2 4.9 LENM
BNM e 20:14:36.42 0.5 80.4 51 b:2.5+1 1.3 5.0 BNM
LPM e 20:14:36.60 0.4 80.5 51 b:2.6+1 1.3 5.1 LPM
SKAG P 20:14:36.90 0.2 80.7 19 b:1.8+1 1.1 5.0 SKAG
PV04 P 20:14:37.57 0.4 80.7 46 PV04
MCK P 20:14:37.62 -0.9 81.1 11 b:2.7+1 .98 5.3 MCK
TNA P 20:14:37.70 1.0 80.7 2 b:1.2+1 .92 4.9 TNA
PV01 P 20:14:38.05 0.2 80.8 46 b:2.4+3 1.2 7.1X PV01
ANMO e 20:14:38.79 0.4 80.9 50 b:7.0+1 1.7 5.4 ANMO
MENT P 20:14:40.04 -0.3 81.4 13 MENT
MCMT P 20:14:40.48 0.0 81.3 39 b:8.5+0 1.0 4.7 MCMT
MSO P 20:14:41.46 -1.0 81.7 37 b:1.9+1 1.3 5.0 MSO
BSMT P 20:14:42.06 -0.9 81.8 36 b:5.4+1 1.8 5.3 BSMT
RRI2 P 20:14:42.21 0.7 81.5 41 b:9.6+1 1.6 5.6 RRI2
e 20:14:53.41 5.9X
DLMT P 20:14:42.66 0.1 81.7 39 b:7.7+1 1.7 5.5 DLMT
TPAW P 20:14:43.13 0.0 81.8 41 b:2.7+1 1.2 5.2 TPAW
LOHW P 20:14:43.43 -1.1 82.0 41 b:6.2+1 1.7 5.4 LOHW
MOOW P 20:14:43.48 -0.9 82.0 41 b:3.0+1 1.5 5.2 MOOW
JTMT P 20:14:43.50 -0.6 82.0 36 b:3.6+0 1.0 4.4 JTMT
DCID1P 20:14:43.64 1.1 81.7 41 b:2.5+1 .93 5.3 DCID
CHMT P 20:14:43.90 -1.0 82.1 37 b:7.2+0 1.0 4.7 CHMT
LRM P 20:14:44.09 -0.3 82.0 38 b:3.9+2 1.7 6.2 LRM
e 20:15:04.07 14.1X
COLA P 20:14:44.09 -0.9 82.3 11 b:2.1+1 .85 5.3 COLA
IMW P 20:14:44.53 0.3 82.0 40 b:3.7+1 1.3 5.3 IMW
SNOW P 20:14:44.56 0.9 81.9 41 b:1.8+1 .95 5.1 SNOW
QLMT P 20:14:45.67 0.7 82.2 39 b:1.1+1 1.7 4.7 QLMT
BOZ P 20:14:46.17 -0.3 82.4 39 b:6.1+1 1.8 5.4 BOZ
SMCO P 20:14:46.68 0.3 82.4 46 b:7.6+1 1.7 5.5 SMCO
YMR P 20:14:47.66 1.6 82.3 40 b:4.6+1 1.2 5.5 YMR
HRY P 20:14:49.39 0.8 82.9 38 b:1.8+1 .92 5.2 HRY
LKWY e 20:14:50.04 2.4 82.7 40 b:2.4+1 1.0 5.3 LKWY
ISCO P 20:14:52.77 0.1 83.6 46 b:4.9+0 .38 5.1 ISCO
COLD P 20:14:54.46 0.3 84.1 9 b:1.4+1 1.2 5.1 COLD
JCT P 20:14:56.35 0.5 84.2 56 b:1.0+1 1.0 5.0 JCT
AMTX P 20:14:57.29 0.5 84.4 52 b:4.7+1 1.1 5.6 AMTX
RSSD P 20:15:07.26 0.2 86.5 43 b:2.2+1 1.3 5.2 RSSD
HKT P 20:15:10.88 0.0 87.3 58 b:4.6+1 1.7 5.4 HKT
DGMT P 20:15:15.97 0.7 88.3 39 b:2.4+1 1.2 5.4 DGMT
e 20:15:26.67 6.9X
YKW3 P 20:15:22.75 -0.8 90.1 23 b:5.9-2 .90 2.8X YKW3
SNAA P 20:15:37.29 0.1 93.0 177 b:2.5+1 1.5 5.4 SNAA
Generated 2009 APR 20 at 20:54 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
