Dr. Lawlor's Code, Robots, & Things

September 28, 2015

Earthquake P-wave and nighttime anxiety

Filed under: Random Thoughts — Dr. Lawlor @ 9:24 pm

About 2am last night, I woke up feeling extremely anxious, and the hairs on my arms were standing up–neither of which is at all typical for me!  A few seconds later, I felt the bed start shaking very gently, and I realized it was probably an earthquake.

Checking the USGS Earthquake Map, there was indeed a magnitude 3.1 earthquake in our hills at this time, about 60km away and 11km deep.  Clearly something about the earthquake woke me up, but it’s surprising I subconsciously managed to detect the P wave while sound asleep, considering the later S wave (typically 2-3 times larger) could barely be felt.

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