Phase Data
21 SEP 2011 (264)
ot = 23:10:46.96 +/- 2.96 SAMOA ISLANDS REGION
lat = -16.991 +/- 14.9
lon = -172.851 +/- 18.3 MAGNITUDE 4.9 (GS)
dep = 34.8 +/- 4.2
150 km (93 miles) SE of Hihifo, Tonga (pop 2,000)
219 km (136 miles) NNE of Neiafu, Tonga
520 km (323 miles) NNE of NUKU`ALOFA, Tonga
2516 km (1562 miles) NNE of Auckland, New Zealand
nph = 23 of 24 se = 1.46 FE=169 A
error ellipse = (126.0, 2.0, 33.4; 35.0, 20.0, 15.4;223.0, 69.0, 3.4)
mb = 4.9 ( 11) ML = 4.0 ( 2) mblg = 3.9 ( 1) md = 0.0 ( 0) MS = 0.0 ( 0)
sta phase arrival res dist azm amp per mag amp per mag sta
AFI ePn 23:11:34.15 -1.2 3.2 19 L:9.2-1 2.5 4.1 g:3.2-1 1.0 3.9 AFI
eSn 23:12:07.94 S res = -4.8
MSVF ePn 23:12:58.16 7.5 8.7 264 MSVF
URZ eP 23:15:46.49 -1.7 22.9 201 b:3.6+1 .62 5.0 URZ
BKZ eP 23:15:56.91 -1.3 24.0 201 b:1.5+1 .68 4.6 BKZ
HIZ eP 23:15:59.43 1.0 24.0 204 b:1.6+2 1.5 5.3 HIZ
JCUZ ee 23:18:14.13 0.0X 40.1 27 b:2.2+2 .72 6.0 JCUZ
WB2 eP 23:19:37.63 -0.7 50.0 258 b:1.2+1 1.2 4.8 WB2
AS01 eP 23:19:39.00 0.0 50.1 253 AS01
AS31 eP 23:19:39.33 0.0 50.1 253 b:6.5+0 .60 4.8 AS31
SBA eP 23:21:01.02 -0.2 61.7 185 b:3.2+1 1.7 5.2 SBA
QSPA eP 23:22:12.64 -0.8 73.1 180 b:4.1+1 2.0 5.1 QSPA
MNTX eP 23:22:56.12 -1.0 80.8 53 b:1.1+1 1.8 4.5 MNTX
TX31 eP 23:23:00.55 1.8 81.0 56 TX31
eP 23:23:00.92 2.0
P17A epP 23:23:06.40 0.4 80.6 44 P17A
ILB eP 23:23:09.12 -3.6 83.9 11 ILB
WRH eP 23:23:10.75 0.5 83.4 11 WRH
CCB eP 23:23:10.81 -0.5 83.6 11 CCB
BOZ eP 23:23:11.32 0.8 83.3 38 b:1.4+1 1.7 4.8 BOZ
IL1 eP 23:23:11.57 -1.2 83.9 11 IL1
MDM eP 23:23:12.62 0.2 83.8 10 MDM
YHH eP 23:23:12.84 2.1 83.3 39 b:8.4+0 1.5 4.6 YHH
DAWY eP 23:23:17.65 0.1 84.8 14 DAWY
Generated 2011 SEP 21 at 23:27 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
