PDXBoom

PSU seismograph snapshot. The boom is visible at 20:04 PDT or 03:04 UTC (click to enlarge).

Around 8:04PM on March 28, 2010, a mysterious boom was heard throughout Portland. Police confirmed that the cause was a large pipe bomb.

Resources

• Google map of boom reports - Add yours!
• Seismic data from PSU
• Mystery of 'The Earthquake Boom’ - a real earthquake

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