However, based on research and measuring the damage that occurred, scientists estimate that the quake was around a 7. The Loma Prieta earthquake was a 6.
Find even more San Francisco earthquake facts from these earthquake books including first-hand accounts, historical pictures, and more details on how they happened. So, you are probably also wondering about when the next one is predicted to happen. Well, this is a tough question to answer. This is a tough statistic to grasp, since there are a lot of 'ifs' involved. However, they do estimate that the chances of the next big one hitting soon is more likely than not. They also predict that it will hit closer to an urban area than the Loma Prieta.
If this is true, then a lot more damage will occur than in Almost any tour you go on or historical museum you visit, you will get the chance to learn a little more about the earthquake facts for this area of the county.
Many focus on the big one, the earthquake and fire. If you want to learn even more, the following museums and tours offer you a few more details. You get to see one of the first fire engines in SF it's so cute! They also have a small exhibit on the earthquake. Many of the items shown burned in the hot flames that started shortly after the quake hit.
It's a little off the beaten path and free to visit. This one's great because it shows a map of the damaged areas. You will also see a few articles about the destruction.
The image below also shows the headline from the local SF newspaper the day after it hit. At the moment, they offer three tours dedicated to the impact of the earthquake and fire. Two take you through the downtown area, which suffered the most due to number of people and the buildings in this area at the time.
The third one takes you through the Presidio area, which is where many people ended up staying due to the loss of their home after this same earthquake. There are a few things for you to keep in mind if you find yourself in one while visiting. Here are some earthquake facts and tips to remember:. As I mentioned before, the odds of you finding yourself in an earthquake while visiting San Francisco are very, very small. If you do feel one, it will most likely be a really small, short earthquake with little or no damage.
This well-done museum offers a look under the waters of the SF Bay. It would take a mere geologically speaking 2 million years for your nails to extend kilometers 60 miles from San Bernardino to Palmdale. It took many millions of years of movement on faults earthquakes to shape Southern California's current landscape. The last significant earthquake on the Southern California stretch of the San Andreas fault was in , and there has not been a rupture of the fault along its southern end from San Bernardino to the Salton Sea since It is still storing energy for some future earthquake.
But we don't need to wait for a "big one" to experience earthquakes. Southern California has thousands of smaller earthquakes every year. A few may cause damage, but most are not even felt. And most of these are not on the major faults listed above. The earthquake map above shows that earthquakes can occur almost everywhere in the region, on more than additional faults that can cause damaging earthquakes, and countless other small faults.
Larger image A schematic block model of Southern California showing the motion of the Pacific and North American plates, and the big bend of the San Andreas fault where the plates squeeze together. This is mostly due to the "big bend" of the San Andreas fault, from the southern end of the San Joaquin Valley to the eastern end of the San Bernardino mountains see diagram at right.
Where the fault bends, the Pacific and North American plates push into each other, compressing the earth's crust into the mountains of Southern California and creating hundreds of additional faults many more than shown in the fault map.
These faults produce thousands of small earthquakes each year, and the other half of our significant earthquakes. These fault segments are given a different value for name, number, code, or dip direction and so in the database each segment occurs as its own unique entity. For example, the San Andreas Fault has several fault segments, from letters a to h, and fault segment 1h has segments with age Why are there no faults in the Great Valley of central California?
Since its formation, the Great Valley has continued to be low in elevation. Starting about 20 million years Invalid Scald ID. What is a "Quaternary" fault? A Quaternary fault is one that has been recognized at the surface and that has moved in the past 1,, years 1.
That places fault movement within the Quaternary Period , which covers the last 2. Where can I find a fault map of the United States? Is one available in GIS format? An online map of United States Quaternary faults faults that have been active in the last 1. There is an interactive map application to view the faults online and a separate database search function.
How do I find the nearest fault to a property or specific location? Bay Area Earthquake Alliance For faults in California and the rest of the United States as well as the latest earthquakes use the Latest Earthquakes Map : click on the "gear" icon in the upper-right corner scroll down to Map Layers, and turn on U.
Faults mouse How do I find fault or hazard maps for California? An online map of faults that includes California is in the Faults section of the Earthquake Hazards Program website. What is a fault and what are the different types? A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. This movement may occur rapidly, in the form of an earthquake - or may occur slowly, in the form of creep.
Faults may range in length from a few millimeters to thousands of kilometers. Most faults produce repeated What is the relationship between faults and earthquakes? What happens to a fault when an earthquake occurs? Earthquakes occur on faults - strike-slip earthquakes occur on strike-slip faults, normal earthquakes occur on normal faults , and thrust earthquakes occur on thrust or reverse faults. When an earthquake occurs on one of these faults, the rock on one side of the fault slips with respect to the other.
The fault surface can be vertical, horizontal, Filter Total Items: Detweiler, Shane T. View Citation. Detweiler, S. Year Published: UCERF3: A new earthquake forecast for California's complex fault system With innovations, fresh data, and lessons learned from recent earthquakes, scientists have developed a new earthquake forecast model for California, a region under constant threat from potentially damaging events.
Field, Edward H. Field, E. Geological Survey —, 6 p. Year Published: Earthquakes and faults in southern California The map depicts both active and inactive faults and earthquakes magnitude 1. Sleeter, Benjamin M. Attribution: Western Geographic Science Center.
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