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Preliminary Earthquake Report

Magnitude 4.1 CHINA-VIETNAM BORDER REGION
Saturday, May 21, 2011 at 20:31:17 UTC

Magnitude 4.1
Date-Time Saturday, May 21, 2011 at 20:31:17 (UTC) - Coordinated Universal Time
Sunday, May 22, 2011 at 03:31:17 AM local time at epicenter
Time of Earthquake in other Time Zones
Location 22.75N 103.60E
Depth 15 kilometers
Region CHINA-VIETNAM BORDER REGION
Distances 82 km (51 miles) SE of Gejiu, Yunnan, China
141 km (88 miles) W of Ha Giang, Vietnam
1048 km (651 miles) NNE of BANGKOK, Thailand
2253 km (1399 miles) SW of BEIJING, Beijing, China
Location Uncertainty Error estimate
Parameters Nst=15, Nph=15, Dmin=652.3 km, Rmss=1.45 sec, Erho=24.1 km, Erzz=10.0 km, Gp=90.0 degrees
Source USGS NEIC (WDCS-D)
Event ID us2011lecj

Earthquake Location

Earthquake Location

Historic Seismicity