1906_San_Francisco_earthquake_seismograph By Pekachu (USGS pages [1], USGS page) [Public domain], via Wikimedia Commons
- Have you ever experienced an earthquake? - Image 1
Caption: 1906 San Francisco earthquake seismograph (Image by Pekachu - USGS pages 1, USGS page - Public domain, via Wikimedia Commons)
![1906_San_Francisco_earthquake_seismograph By Pekachu (USGS pages [1], USGS page) [Public domain], via Wikimedia Commons
- Have you ever experienced an earthquake?](https://images.toopa.com/1120483_1906_san_francisco_earthquake_seismograph-by-pekachu-usgs-pages-1-usgs-page-public-domain-via-wikimedia-commons1.jpg)