Earthquake

The quake was detected northwest of Bay Point and Pittsburg, and appeared to be most acutely felt by East Bay residents. More for you. Earthquake Tracker: ...

BART riders should expect up to 20-minute delays system-wide Thursday morning as the inspections occur. The quake was detected northwest of Bay Point and Pittsburg, and appeared to be most acutely felt by East Bay residents. A 4.1-magnitude earthquake jolted the Bay Area Thursday morning, according to the U.S. Geological Survey.

New research uses gravity and a machine learning model to instantaneously estimate the magnitude and location of large earthquakes.

“In fact, the applicability of our model is limited to such large earthquakes (magnitude above 8.3/8.4) because the signal’s amplitude for relatively smaller earthquakes is too small and buried in the background noise. “This is important for earthquake early-warning systems because for the largest earthquakes there is an extended time (up to minutes) in which they gather magnitude and strength,” explained Andreas Plesch, a senior Earth scientist at Harvard University who was not involved in the new work. “Once an earthquake occurs, these signals travel faster than seismic waves and are strongly sensitive to the earthquake magnitude.…Because of that, our model can estimate the magnitude of the earthquake faster and more accurately than conventional early-warning systems based on P waves at least for large earthquakes (magnitude above 8.3/8.4).” The new model’s strength in forecasting large earthquakes “is because the elastogravity signal is strongly sensitive to the magnitude of such large earthquakes,” Licciardi explained. “The main advantage of our model relies on the underlying data, the elastogravity signals,” he explained. They propagate at the speed of light, carrying earthquake information much faster than seismic waves traditionally used in early-warning systems.

A magnitude 4.1 earthquake hit the Bay Area near Bay Point on Thursday morning, according to authorities.

There were no immediate reports of damage or injuries. The earthquake was felt from the Sacramento area to Santa Cruz, reports to the USGS Did You Feel It website indicated. The U.S. Geological Survey said the earthquake hit at 5:07 a.m. on the north edge of Suisun Bay about 3.7 miles northeast of Bay Point. The depth of the earthquake reached about 19.7 miles, according to the USGS.

A magnitude 4.1 earthquake shook the San Francisco Bay Area before sunrise Thursday morning, rattling homes and waking many residents.

More than 3,600 people reported feeling it to the USGS as of 6 a.m. The quake hit at 5:07 a.m. with a depth of about 12 miles, the Unites States Geological Survey said. The quake struck just northwest of Bay Point with the epicenter 6.2 miles northwest of Pittsburg, 7.9 miles north of Concord and 21.6 miles northeast of Berkeley.

(KRON) – A 4.1 magnitude earthquake was reported in the East Bay 2.5 to 3.7 miles north-northwest of Bay Point, according to the U.S. Geological Survey.

A magnitude 4.1 earthquake occurred Thursday morning five miles from Pittsburg, Calif., seven miles from Fairfield and eight miles from Suisun City.

If you’re interested in learning more about the system, visit our list of frequently asked questions. Find out what to do before, and during, an earthquake near you by signing up for our Unshaken newsletter, which breaks down emergency preparedness into bite-sized steps over six weeks. The earthquake occurred at 5:07 a.m. five miles from Pittsburg, seven miles from Fairfield and Antioch and eight miles from Suisun City. The quake occurred at a depth of 12.3 miles.