Sunday, August 24, 2014
Seismogram of Napa 6.0 Magnitude Earthquake from Modesto
The bottom image is the raw data. Each horizontal line on the screen represents one hour of recording time, and so about two days are represented. The waves reverberated through our area for about eight minutes or so. The computer program allows us to isolated the event and manipulate the appearance of the waves, so the upper image is the same data, only spread out. Modesto is located about 100 miles from Napa as the crow flies, and the largest waves were off-scale. I'm pretty sure there were people in Modesto who felt the event.