There have been a number of "famous" or perhaps "infamous" Chilean earthquakes, including the 1960 Valdivia Earthquake, which with a magnitude of 9.5 was the largest ever recorded by seismometer.
Another was the earthquake that occured in February 2010 shortly after the devestating Haitian earthquake of January 2010.
For more information, please see the related question and links.
Geological faults are planar fractures. More information can be found on sites such as Wikipedia, as well as the California Geological Survey website.
The US Geological Survey's National Earthquake Information Center monitors seismic activity all over the globe. When earthquakes above a certain magnitude are detected, they inform the relevant authorities and organisations. Please see the related link.
Near volcano and earthquake areas on the ocean floor, you would expect to find features like mid-ocean ridges, deep-sea trenches, seamounts, and hydrothermal vents. These features are associated with tectonic plate boundaries and geological activity, such as volcanic eruptions and seismic events, that occur in these areas.
Scientists used a variety of methods, including geological surveys, seismic data analysis, and computer modeling, to study the movement of the tectonic plates during Japan's earthquake. They also investigated the structural integrity of the fault lines and fault zones to determine what went wrong and led to the earthquake.
Scientists need information from at least three cities to determine the epicenter of an earthquake because each city provides a distance measurement to the epicenter. By triangulating these distances, scientists can pinpoint the intersection point, which represents the epicenter of the earthquake. Having data from three cities helps to confirm the location of the epicenter more accurately.
A good place to start would be the website of a national geological or geophysical survey agency or universities with departments of geology / geophysics or seismology. For more information on this specific earthquake, please see the related links
Geological faults are planar fractures. More information can be found on sites such as Wikipedia, as well as the California Geological Survey website.
I don't have real-time data access to provide current updates on events like earthquakes. To find out if there was an earthquake in Youngstown today, you can check the United States Geological Survey (USGS) website or local news sources for the most accurate and timely information.
The US Geological Survey's National Earthquake Information Center monitors seismic activity all over the globe. When earthquakes above a certain magnitude are detected, they inform the relevant authorities and organisations. Please see the related link.
Contact the state Geological Survey.
underwater
I don't have real-time data access to confirm recent events, including earthquakes. To find out if there was an earthquake in Orange County, California, you can check reliable sources like the US Geological Survey (USGS) website or local news outlets for the most current information.
villiage
The fault that caused the 1906 San Francisco earthquake has an estimated length of about 296 miles (477 km). Scientists determined this information by studying the surface rupture, seismic waves, and geologic features left behind by the earthquake, combined with geological mapping and trenching techniques along the fault trace.
You can find information about earthquakes that have happened in California on the earthquake page of the USGS website. Alternatively you can find information on the about website under the geography section which has an article about earthquakes in California.
Your local geological organization is a great place to find information on natural resources. Local libraries are also an undoubtedly good means of information concerning natural resources.
Google has started an Online Crisis Center in response to the devastating 9.0 magnitude earthquake that has hit Japan. Resources include a person finder tool, alerts, warnings, maps, etc. with real-time updates. Also the U.S. Geological Survey (USGS) provides lots of information about earthquakes in US and worldwide. See related links below.