What earthquake caused the damage seen in this photo?pic.twitter.com/hRWoic97KM
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Who is the surprise guest invited to teach students about earthquakes?⠀pic.twitter.com/tCYOk7C7BG
What projects necessitated Dr. Charles F. Richter to install a seismograph in his living room?pic.twitter.com/I4Dgxi0Dj6
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