The 1812 Caracas earthquake took place on March 26, 1812 at 4::37 pm. It measured 7.7 on the Richter magnitude scale. An estimated 15,000-20,000peopleperished as a result, in addition to incalculable material damage. The seismic movement was so drastic that in a zone named Valecillo, a new lake was formed and the river Yurubi was dammed up. Numerous rivulets changed their course in the valley Caracas, which was flooded with dirty water.