Powerful Earthquake Strikes Mariana Islands Region

Quake measuring up to 7.4Mw strikes WSW of Hagatna, Guam

Epicentered at 12.409°N, 141.487°E, the quake struck about 375 km (230 miles) WSW of HAGATNA, Guam, at a depth of 4.7km on August 13, 2010 at 21:19:32 UTC, USGS/EHP reported.

Aftershocks

The mainshock was followed by about a dozen aftershocks, the largest of which measured up to 6.6Mw, as of posting.

Tsunami
NO Pacific-wide destructive tsunami was expected, NWS Pacific Tsunami Center said.

Earthquake Details

• Magnitude: 7.2
• Date-Time:
  • Friday, August 13, 2010 at 21:19:32 UTC
  • Saturday, August 14, 2010 at 07:19:32 AM at epicenter
• Location: 12.409°N, 141.487°E
• Depth 4.7 km (2.9 miles) (poorly constrained)
• Region MARIANA ISLANDS REGION
• Distances:
  • 375 km (230 miles) WSW of HAGATNA, Guam
  • 445 km (275 miles) WSW of Rota, Northern Mariana Islands
  • 485 km (300 miles) NE of Yap, Micronesia
  • 550 km (340 miles) WSW of SAIPAN, Northern Mariana Islands
• Location Uncertainty:  horizontal +/- 14.6 km (9.1 miles); depth +/- 5.1 km (3.2 miles)
• Source: USGS NEIC (WDCS-D)
• Event ID: us2010zxcf

10-degree Map Centered at 10°N,140°E

Earthquake Location Map. Source: USGS/EHP. Enhanced by FEWW.

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