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108 year anniversary of the 1906 San Francisco Earthquake

At 5:12 AM on April 18, 1906, the ground shook like it had never done before in San Francisco. An estimated Magnitude 7.8 earthquake broke the city, and started numerous fires that decimated what was left of many structures. Over 3,000 people died. This major earthquake ruptured 296 miles (477 kilometers) of the San Andreas Fault from San Juan Bautista to Cape Mendocino. No warning was available then. Even today, 108 years later, there is no accepted warning system for such a quake. In 1906, horses were reported to be agitated in the barns nea [...] Continue Reading

April 1, M8.2 quake and several M7’s near Iquique, Chile

The massive M8.2 quake near Iquique, Chile on April 1 reminds us that the northern area of Chile near the Peru border had been long overdue for a large earthquake. QuakeFinder has been concerned about this area since 2010 when we installed 4 sites on the Peru side of the border. In January 2014 we installed a new site 40 miles (approximately 64 kilometers) south of Iquique, working with our partners at Pontificia Universidad Catolica de Chile in Santiago, Universidad de Concepción, Universidad Andrés Bello (UNAB), and Center of the Desert [...] Continue Reading

Starting a new Magnetometer Network in Chile

QuakeFinder started a new magnetometer network in Chile in January. Why Chile? There are lots of earthquakes in Chile! Chile had the world’s largest recorded earthquake in modern history—a M9.5 near Valpariso in May of 1960 (greater than Sumatra, Japan, and Haiti)and it generated a 38 ft tsunami. More recently, Chile had another M8.8 in Feb 2010, between Santiago and Conception, with some of the damage shown in the picture below. We found some wonderful collaborators at the Catholic University in Santiago (PUC-C), at the [...] Continue Reading

M6.9 Quake off Coast of Northern California

There was a major earthquake (M6.9) off the northern coast of California on Sunday, March 9, 2014, about 50 miles west of Eureka. Geographic coordinates: 40.821N, 125.128W Magnitude: 6.9 Depth: 7 km Universal Time (UTC): 10 Mar 2014  05:18:12 Time near the Epicenter: 9 Mar 2014  21:18:12 QuakeFinder has several sites near the north coast. The closest site, Ferndale (site number 830) is located 47 miles east of  the epicenter (which was near the “Triple Junction” of 3 fault lines). Although our anticipated range of [...] Continue Reading

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