There are usually no more than 15 earthquakes strong enough to trigger seismic alerts in France in a year. This was the 25th, but experts explain there is no cause for concern A 3.6-magnitude early-morning earthquake on Saturday was the 25th of the year in France powerful enough to prompt a seismic alert, officials have said.The quake, on the border of the Charente and Charente-Maritime about 20 kilometres southeast of Jonzac, was the second in the region in less than three weeks. Its epicentre was just 12km from a 4.9-magnitude tremor that shook the same area on March 20. No damage was reported.#Séisme faible à environ 21 km SE Jonzac (dépt. 17, le 06-04-19 à 6h44 heure locale, M=3,6) selon CEA-LDGhttps://t.co/D8jQFyhJdA pic.twitter.com/Sw7jxBzoX9— FranceSeisme (@FranceSeisme) April 6, 2019 Another earthquake on March 20, in Brittany, was unrelated to the Charente tremors, officials said.Seismic alerts are triggered when quakes of 3.5-magnitude or higher … [Read more...] about Second earthquake in 3 weeks hits same area of France
Earthquakes hit california
Researchers from the US Geological Survey analyzed long paleoseismic records from three fault locations — San Andreas, San Jacinto and Hayward — and identified eight strong quakes that occurred between 1800 and 1918. These include the historic 1906 earthquake which destroyed most of San Francisco and a similar one in 1857 in southern California. The strength of these quakes tore through the surface of the earth's crust. © AP Photo / Lee Jin-manModerate 5.5 Magnitude Earthquake Registered in Indian Ocean – USGS The sojourn in quakes that are comparable in size is what the study points to as "exceptional." While the lack of destructive seismic events has been a blessing, experts know that the relative calm can only last so long, and they can't be sure when or where the next powerful quake will hit. "We know these big faults have to carry most of the [tectonic] motion … [Read more...] about California ‘Earthquake Drought’ Signals State is Overdue For the Big One
There are other examples of frequent major earthquakes. In the 1500s, for instance, three major San Andreas fault earthquakes hit along the Grapevine, according to Scharer, possibly all within 30 years. And over the last 1,000 years in the southernmost 100 miles of the San Andreas fault system, there have been three periods of increased seismic activity — between 900 and 1100, 1200 and 1400, and 1600 to 1800, according to Rockwell. In that section, it has been relatively quiet for the last 219 years. … [Read more...] about California’s in an exceptional earthquake drought. When will it end?
Doyle Rice USA TODAY Published 6:12 AM EST Jan 8, 2019 The USA led the world in catastrophes last year. Racking up an overall damage cost of $16.5 billion, the devastating and deadly Camp Fire that ravaged California in November was the world's costliest natural disaster in 2018. The data come from a report issued Tuesday by Munich Re, a reinsurance firm. In second and third place last year were Hurricanes Michael ($16 billion) and Florence ($14 billion). Florence dumped heavy rain across the Carolinas in September, and Michael tore into the Florida Panhandle in October. Michael, which had a wind speed of 155 mph at landfall, was the fourth-strongest hurricane on record to hit the USA. It reduced the small town of Mexico Beach, Florida, to rubble. The disastrous Camp Fire, California's deadliest on record with 86 fatalities, stood out for its ferocity: "Such massive wildfires appear to be occurring more frequently as a result of … [Read more...] about Natural disasters: California Camp Fire was world’s costliest in 2018
The app, which can be downloaded on both Apple and Android phones, will essentially send out push alerts to residents within an estimated 20 seconds before an earthquake hits the densely populated county. — Mayor Eric Garcetti (@MayorOfLA) January 2, 2019 But not every detected earthquake will trigger a phone alert. Per Los Angeles-based news station KABC, alerts will only be sent out when one of the hundreds of sensors owned by the US Geological Survey measures a quake that registers a 5.0 or higher on the Richter scale. The app, which has both English and Spanish language options, is the end result of a partnership between the Los Angeles City Council, AT&T and the Annenberg Foundation, Curbed Los Angeles reported. © AFP 2018 / MARK RALSTON“Locked, Loaded and Ready to Go”: California Braces for a Major Earthquake In addition to sending out warnings, the app also provides … [Read more...] about ‘Protect Yourself Now!’: Earthquake Early Warning App Available for Angelenos