Earthquake Details
This event has been reviewed by a seismologist.
Magnitude
4.7
Date-Time
Wednesday, April 20, 2011 at 11:31:47 UTC
Wednesday, April 20, 2011 at 06:31:47 PM at epicenter
Location
4.713°N, 94.514°E
Depth
39.9 km (24.8 miles)
Region
OFF THE WEST COAST OF NORTHERN SUMATRA
Distances
126 km (78 miles) SW (226°) from Banda Aceh, Sumatra, Indonesia
387 km (240 miles) SSE (161°) from Misha, Nicobar Islands, India
476 km (296 miles) WNW (285°) from Medan, Sumatra, Indonesia
816 km (507 miles) WNW (283°) from KUALA LUMPUR, Malaysia
Location Uncertainty
horizontal +/- 23.3 km (14.5 miles); depth +/- 11.3 km (7.0 miles)
Parameters
NST= 33, Nph= 35, Dmin=276.1 km, Rmss=0.33 sec, Gp=104°,
M-type=body wave magnitude (Mb), Version=7
Source
U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver
Event ID
usc0002vlg
This event has been reviewed by a seismologist.
Magnitude
4.7
Date-Time
Wednesday, April 20, 2011 at 11:31:47 UTC
Wednesday, April 20, 2011 at 06:31:47 PM at epicenter
Location
4.713°N, 94.514°E
Depth
39.9 km (24.8 miles)
Region
OFF THE WEST COAST OF NORTHERN SUMATRA
Distances
126 km (78 miles) SW (226°) from Banda Aceh, Sumatra, Indonesia
387 km (240 miles) SSE (161°) from Misha, Nicobar Islands, India
476 km (296 miles) WNW (285°) from Medan, Sumatra, Indonesia
816 km (507 miles) WNW (283°) from KUALA LUMPUR, Malaysia
Location Uncertainty
horizontal +/- 23.3 km (14.5 miles); depth +/- 11.3 km (7.0 miles)
Parameters
NST= 33, Nph= 35, Dmin=276.1 km, Rmss=0.33 sec, Gp=104°,
M-type=body wave magnitude (Mb), Version=7
Source
U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver
Event ID
usc0002vlg
