![]() There are a number of active faults there in what’s called the Walker Lane system, said Keith Knudsen, deputy director of the USGS Earthquake Science Center in Menlo Park. The Eastern Sierra has long been a spot where geologists go to study the active earthquake faults that give the Sierra Nevada - California’s mightiest mountain range - its dramatic topography. It was probably a fairly good shake that was pretty alarming,” Elliott said. Living on a relatively high floor of a building in San Francisco “may have certainly amplified the experience - compared to neighbors and other friends around me who did not feel the earthquake,” Elliott said during the news briefing.įor people in the Bay Area, “this one - because of its distance - was probably more perceptible in places that really amplify the slow, distant waves - and so, like the high building that I’m in,” he said.īut in places such as Reno or Carson City, Nev., “this was a much stronger jolt through there. Dog ran around a bit,” he wrote on Twitter. A preliminary magnitude 5.5 earthquake has struck north of Chico, California, Thursday. ![]() People living on top of basin sediments and soft soils are at higher risk of feeling amplified shaking from a distant quake, whereas people living on bedrock, a hillside or a ridge are less likely to feel it.Įlliott, who was in San Francisco when Thursday’s quake hit, said he felt strong shaking. Thursday’s 5.5 magnitude quake, centered in the waters of Lake Almanor in northwestern Plumas County struck at 4:19 p.m., according to the U.S. It’s expected for a quake of this magnitude to be felt broadly across the state, Elliott said. There have been a couple of dozen earthquakes larger than magnitude 5 in the region of Thursday’s quake in the last 50 years. This map shows earthquakes within the last 30 days of 2.5 magnitude or higher as red circles. Earthquake damage can be seen outside a building in Rio Dell in Humboldt County after a 6.4 earthquake hit early Tuesday. Thursday’s earthquake was the largest in the region since the magnitude 6.1 Double Spring Flat earthquake in 1994 in sparsely populated western Nevada, which was felt from Sacramento to Elko, Nev., but did not result in loss of life. Click a circle or fault line for details. At least 2 dead, 11 injured after 6.4 earthquake in Northern California. According to the USGS, in the next 30 years, California has a 99.7 chance of a magnitude 6.7 or larger earthquake. Major earthquakes of Magnitude 7 to 7.9 occur in California about once every 10 years. Here’s a basic primer on the science of earthquakes. The San Andreas fault, Californias major earthquake rift zone, is one natural feature that elicits a strong response from most visitors. Strong earthquakes of Magnitude 6 to 6.9 strike on an average of once every two to three years. If a developer wants to build a subdivision, say, they are usually required to build about 50 feet (15 meters) away from the fault to reduce their earthquake risk, Bryant said.īut just because structures are set back from a fault, they can still be damaged when the ground shakes or by landslides, Bryant said.California How earthquakes happen: The science of a shakeīefore we can prepare for the Big One, we have to know what “one” is. Narrator: On July 4, 2019, Ridgecrest, California, was hit with a 6.4 magnitude earthquake and then a 7.1 just one day later. ![]() This will help with the geological investigations that are required to obtain a building permit, Bryant said. Heres what will happen if the big one hits the West Coast. Epicenter 29.6 miles northeast of Redding 3.2 magnitude. By clicking the highlighted area, users can download an official PDF of the map. Epicenter near Northern California Shakemap 3.1 magnitude Septem11:30 p.m. Just like searching for directions, someone can search an address and if it's in a fault zone it will be highlighted. The earthquake came just days after a small magnitude 3.6 earthquake struck the San Francisco Bay Area, waking up thousands of people before 4 a.m. "What really was a big help was the Google map," Bryant told OurAmazingPlanet. After 30 years as a geologist, reading a map has become second nature to him, Bryant said, but to someone looking at these maps for the first time they can seem like bunch of squiggly lines. "The ability to read a map varies greatly," Bryant said. California is known as earthquake country and in the Bay Area, there are four major faults running in a north-south direction. These major faults in California could affect 36 counties and 104 cities, so geologists have tried to make the site as user-friendly as possible. The maps include the San Andreas, San Jacinto, Calaveras and Hayward faults.Ī fault is a fracture or group of closely associated fractures in the crust of the Earth along which rocks on one side have moved relative to those on the other side.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |