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Art Frankel and Craig Weaver of the U.S. Geological Survey gave a presentation to the Seattle City Council on Monday (as noted in this agenda) that has raised some eyebrows – and reaffirms our sensitivity to upcoming seismic disturbances. See their PowerPoint presentation or read on for a few copies of a few of their slides.

In 2014, there will be a regular 6 year update to the National Seismic Hazard Maps. A workshop on the Pacific Northwest Portion of this was held locally on March 21-22, 2012.

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Two new articles from the Homeland Security Newswire and the Yakima Herald discuss new fault lines (maybe better described as...

Hazus is a nationally applicable standardized methodology that contains models for estimating potential losses from earthquakes, floods, and hurricanes. Hazus uses Geographic Information Systems (GIS) technology to estimate physical, economic, and social impacts of disasters.

HAZUS-MH is software developed by FEMA that analyzes risk from natural hazards in communities. Although Hazus-MH itself is free, it requires the users to have ArcGIS with ArcView license level.

Existing HAZUS-MH runs for Vashon (i.e. those for our 2005 Earthquake Study,...

King County OEM’s Pascal Schuback had a neat 138 character tweet today that took me well over an hour to digest:

Know the difference 2B ready RT @USGS: How much bigger is a 8.7 2A 5.8? Click "Try It Yourself" Calculator at top of http://go.usa.gov/baq

As they note on their site, http://earthquake.usgs.gov/learn/topics/how_much_bigger.php:

The magnitude scale is really comparing amplitudes of waves on a seismogram, not the STRENGTH (energy) of the quakes. So, a magnitude 8.7 is 794 times bigger than a 5.8 quake as measured on seismograms, but the 8.7 quake is about 23,000 times STRONGER than the 5.8! Since it is really the energy or strength that knocks down buildings, this is really the more important comparison. This means that it would take about 23,000 quakes of magnitude 5.8 to equal the energy released by one magnitude 8.7 event.

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