Phase Data
20 MAY 2011 (140)
ot = 23:20:19.14 +/- 1.05 NIAS REGION, INDONESIA
lat = 0.291 +/- 11.3
lon = 98.398 +/- 6.8 MAGNITUDE 4.6 (GS)
dep = 47.5 +/- 8.6
155 km (96 miles) SW of Padangsidempuan, Sumatra, Indonesia (pop 178,000)
166 km (103 miles) SSW of Sibolga, Sumatra, Indonesia
485 km (301 miles) SW of KUALA LUMPUR, Malaysia
1177 km (731 miles) NW of JAKARTA, Java, Indonesia
nph = 46 of 48 se = 0.52 FE=706 A
error ellipse = (209.0, 8.0, 19.8; 62.0, 79.0, 13.0;299.0, 5.0, 4.4)
mb = 4.6 ( 26) ML = 4.2 ( 12) mblg = 3.9 ( 6) md = 0.0 ( 0) MS = 0.0 ( 0)
sta phase arrival res dist azm amp per mag amp per mag sta
GSI ePn 23:20:41.40 0.5 1.3 321 L:1.4+1 .65 4.5 g:1.8+0 .80 4.2 GSI
PSI ePn 23:20:56.51 -0.2 2.4 12 L:3.8-1 1.1 3.4 g:1.9-1 .90 3.5 PSI
BKNI ePn 23:21:00.45 1.2 2.6 89 L:4.8+0 .70 4.6 BKNI
LHMI ePn 23:21:33.14 -0.1 5.1 344 L:5.9-1 1.7 4.5 LHMI
KULM ePn 23:21:38.25 0.4 5.5 24 L:1.2-1 .90 3.9 g:4.0-2 .75 3.3 KULM
MYKOMePn 23:21:40.01 -0.6 5.7 75 L:1.6-1 .55 4.1 g:1.0-1 1.3 3.6 MYKO
KSM ePn 23:23:07.64 0.4 12.0 84 KSM
CISI ePn 23:23:11.61 1.1 12.2 130 CISI
SBUM ePn 23:23:34.50 -0.2 14.0 81 SBUM
CM01 eP 23:24:23.75 -2.6 18.0 2 CM01
KKM eP 23:24:34.30 0.6 18.7 72 b:2.0+1 .80 4.4 KKM
MYLDMeP 23:24:55.60 0.5 20.6 76 b:1.5+1 .60 4.5 MYLD
KAPI eP 23:25:10.14 0.9 22.0 104 b:1.4+1 .70 4.5 KAPI
MMRI eP 23:25:40.99 -1.0 25.3 111 b:5.5+1 1.2 5.0 MMRI
NACB eP 23:26:46.98 -0.3 32.7 42 b:1.4+1 .70 4.9 NACB
SAUI eP 23:26:57.34 0.2 33.8 105 b:5.1+2 1.0 6.4 SAUI
FAKI eP 23:26:57.93 -0.7 34.0 96 b:3.2+1 1.3 5.1 FAKI
WB2 eP 23:27:54.24 0.0 40.5 122 b:1.4+1 1.3 4.6 WB2
WRAB eP 23:27:54.27 0.0 40.5 122 b:6.7+0 .75 4.5 WRAB
AS31 eP 23:28:04.92 -0.3 41.9 127 b:7.6+0 1.8 4.1 AS31
AS01 eP 23:28:05.55 0.0 41.9 127 AS01
KBL eP 23:28:20.11 -0.2 43.8 324 b:3.4+0 .50 4.3 KBL
JNU eP 23:28:28.52 0.7 44.7 40 b:5.3+1 2.0 5.0 JNU
KS01 eP 23:28:37.39 0.0 45.9 33 KS01
KS15 eP 23:28:37.61 0.2 45.9 33 KS15
RER eP 23:28:43.80 -0.8 46.8 240 b:6.6+1 1.3 5.4 RER
TKM2 eP 23:28:46.18 -0.6 47.1 337 b:3.1+0 .65 4.4 TKM2
AAK eP 23:28:47.90 -0.4 47.3 336 b:1.0+1 1.6 4.5 AAK
UOSS eP 23:28:50.57 0.1 47.6 304 b:3.0-1 1.0 3.3 UOSS
EKS2 eP 23:28:51.11 0.4 47.6 335 b:2.3+1 2.0 4.8 EKS2
SONA1eP 23:28:52.36 -0.2 47.9 7 SONA
ULN eP 23:28:53.53 0.2 48.0 8 b:4.3+0 .80 4.5 ULN
MK01 eP 23:28:56.37 0.0 48.4 345 MK01
MK31 eP 23:28:56.95 0.3 48.4 345 MK31
MKAR eP 23:28:56.95 0.4 48.4 345 MKAR
MAKZ eP 23:28:57.70 0.4 48.5 345 b:8.2+0 1.2 4.6 MAKZ
TLY eP 23:29:19.69 0.5 51.4 4 b:5.3+0 1.0 4.5 TLY
KURK eP 23:29:31.17 0.3 53.0 344 b:1.1+1 .90 4.9 KURK
ZAA0 eP 23:29:42.75 -0.2 54.6 350 ZAA0
eP 23:29:43.32 0.3
DAMY eP 23:29:47.58 -0.7 55.2 288 b:9.7+0 1.2 4.7 DAMY
BRVK eP 23:30:04.15 0.3 57.6 340 b:6.8+0 .60 4.9 BRVK
ZRNK eP 23:30:07.18 0.8 57.9 340 b:5.5+0 .85 4.7 ZRNK
ABKAReP 23:30:12.96 -0.2 58.9 332 ABKA
BR131eP 23:31:29.67 -0.3 70.6 312 BR13
BR231eP 23:31:30.19 -3.8X 71.3 312 BR23
BUR08eP 23:32:16.04 0.4 78.5 319 BUR0
TWG eScP 23:33:10.66 2.3X 31.4 43 TWG
Generated 2011 MAY 20 at 23:40 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
