Fire Earth

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Seismic Cluster Strikes Offshore Oregon

Posted by feww on May 8, 2010

Larger Shocks May Occur

Cluster of at least 9 shocks strike offshore Oregon

Earthquake measuring about 5.4Mw struck the offshore Oregon about 500km west of Eugene on Friday, May 07, 2010 at 17:46:15UTC.

Epicenter of the earthquake was located near 44.396°N, 129.437°W and occurred at a depth of  10 km (6.2 miles). The initial shock was followed by at least 8 other events [aftershocks] measuring a mean magnitude of about 4.4Mw.

Center of the cluster was about 1,000km (600 miles) south of  a magnitude 8.1 shock that occurred on the Queen Charlotte Fault off Queen Charlotte Island on August 22, 1949. That event was Canada’s largest earthquake since 1700.

10-degree Map Centered at 45°N,130°W

Earthquake Location Map. Source: USGS/EHP. Map enhanced by Fire-Earth.

Earthquake Details

  • Magnitude [USGS Estimate]: 5.1 [Fire Earth Estimate: 5.4, or greater]
  • Date-Time:
    • Friday, May 07, 2010 at 17:46:15 UTC
    • Friday, May 07, 2010 at 08:46:15 AM at epicenter
  • Location: 44.396°N, 129.437°W
  • Depth: 10 km (6.2 miles)
  • Distances:
    • 424 km (263 miles) W (273°) from Yachats, OR
    • 427 km (265 miles) W (271°) from Waldport, OR
    • 427 km (265 miles) WNW (288°) from Barview, OR
    • 505 km (314 miles) W (276°) from Eugene, OR
    • 549 km (341 miles) W (259°) from Portland, OR
  • Location Uncertainty: horizontal +/- 6 km (3.7 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2010vzbx

Cascadia Subduction Zone

Cascadia Subduction Zone. Source: USGS

Related Links:

[* Reference Only. Research suspended see: Calif Earthquake Forecast – Update 4]

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