A 3.4 magnitude earthquake shook the southern part of the Bay Area on Wednesday morning. When this occurs, these deposits lose their strength and behave like a liquid, quicksand. of California, Berkeley (oval in center of image), is nearly bisected by the fault, and it has been extensively retrofitted to withstand fault offset and shaking. Recent seismic events in the Greater San Francisco Bay Area (USGS): ABC7 only lists seismic activity of 2.0 or higher. USGS originally called it a 4.7 but later downgraded it to 4.5. The high density of structures and lifelines along the Hayward Fault make this a very dangerous fault.
Last Updated 2020-07-23 02:31:29 (UTC) Download. Special maps: Long Valley || Los Angeles || San Francisco Earthquake lists: big earthquakes || all earthquakes Magnitude = ? )ForewordThe 1906 Great San Francisco earthquake (magnitude 7.8) and the 1989 Loma Prieta earthquake (magnitude 6.9) each motivated residents of the San Francisco Bay region to build countermeasures to earthquakes into the fabric of the region. Click for more information. (Public domain. (Public domain. "The USGS reported a 2% chance of one or more aftershocks larger than magnitude 4.5 over the next week, but Jones says the chances of a larger quake "dies off dramatically with time. This study is called “The HayWired Earthquake Scenario.” However, USGS researchers are predicting that there is a 70% chance the San Francisco Bay area will see a 6.7 magnitude earthquake or higher along … The Hayward Fault runs through, or near to, some of the most densely urbanized areas in North America. 1 of 19. The “Golden State” is foremost in the public’s mind when we talk about earthquakes and impacts on communities. The 1906 earthquake left 225,000 of San Francisco’s 400,000 citizens homeless. With the objective of enhancing resilience, the scenario aims to improve the communication and use of earthquake hazard studies and early warning and aftershock forecast information, and it will inform future building code developments, community capacity building, and business continuity planning.Ken Hudnut summed up the spirit of the HayWired Coalition, saying, "Teamwork and partnerships have truly been the key to our success in developing the HayWired Earthquake Scenario.”The HayWired scenario depicts a scientifically realistic earthquake sequence, and its cascading impacts, that all starts with a magnitude 7 earthquake on the Hayward Fault. )Earthquake risk and exposure continues to increase with population growth and expanded development in hazard-prone regions of the country. A magnitude 4.5 earthquake struck at 10:33 PM local time in Pleasant Hill, California. They were only sensed by our instruments. 2.5 39 km NW of Stanley, Idaho 2020-07-22 19:18:21 (UTC) 4.5 km. 4.1 June 11, 2019, 12:46 a.m. -- 5.4 miles west of Cobb, California The map shows the past and present population densities. "Most of those were not felt. Many if not most of the fault crossing of these important infrastructure have been or are planned to be strengthened to increase their resilience to future earthquakes.How much has our population grown since 1868?
USGS 2 of 23. The fault is along the east side of California’s San Francisco Bay and is among the most active and dangerous in the United States, because it runs through a densely urbanized and...“In 2017, Californians experienced multiple natural and man-made disasters that have had major impacts to lives, businesses, and communities,” said California Business, Consumer Services and Housing Authority (BCSH) Secretary Alexis Podesta. The Bay Area was rattled Tuesday by a magnitude 4.3 earthquake and a magnitude 3.5 aftershock that hit in the East Bay near Livermore, Calif., on Tuesday. A large portion of California’s economy is dependent on these urban areas that contain a maze of transportation, energy, water, telecommunications, waste disposal, and emergency infrastructure that supports millions of people. Maps are updated within about 5 minutes of an earthquake or once an hour. Back in 1868, only 260,000 people lived in the Bay Area. The 3.4 earthquake was centered in … It was widely felt around the greater Bay Area and people reported feeling it as far away as Sacramento and Fresno. The State of California and its local partners have been preparing for decades; however, there is always more that we can do.” He goes on to say, “We encourage everyone to learn about the HayWired Earthquake Scenario so that they can remain vigilant in their efforts to be prepared for the next earthquake.”Earthquakes pose a threat to the safety of more than 143 million people living in the United States, and estimated long-term annualized earthquake losses in the United States are more than $6.1 billion per year.