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aHowever America Not a country with High earthquake resistance, There are regions and even states where this natural phenomenon is so dangerous that tectonic activity must be monitored.
In fact, the United States Geological Survey (USGS) More sensors in California and NevadaThis region is defined as having the highest earthquake risk in the country, as the probability is determined based on the average incidence of historical events over the next 50 years.
Based on these statistics, the most dangerous zones can help define safe building standards, improve the ability of rescue workers to respond after an earthquake, and even influence insurance calculation rates to protect property. give.
However, the USGS believes that: The risk is high along the west coast, It occurs in mountainous areas and in some areas of the central and eastern parts of the territory. In 2020 alone, at least four earthquakes greater than magnitude 5.5° Richter were recorded in the following states: Nevada, Idaho, Utah, Alaska.
In July 2021, Alaska recorded the most powerful earthquake in half a century, with a magnitude of 8.2 Richter.
The states with the statistically highest rates of earthquakes are: Alaska, Arkansas, California, Hawaii, Idaho, Illinois, Kentucky, Kentucky, Missouri, Montana, Nevada, Oregon, South Carolina, Tennessee, Utah, Washington, and Wyoming.
While in California, the most dangerous areas nationwide are California cities. San Jose, Vallejo, San Diegodue to the fact that in its territory is traversed the presence of geological faults.
What is the probability that a high-intensity earthquake will occur in the United States?
Statistical records of fault slip rates indicate that some parts of the country could soon experience major earthquakes, making these areas the most at risk in the United States.
California
The state has traditionally been seismically active, especially San Francisco Bay Area, Los Angeles, and San Diego. The USGS estimates that there is a 60% chance that a magnitude 6.7 earthquake will occur in Los Angeles and 72% in San Francisco over the next 30 years in this region.
Additionally, a 2013 report estimated that an earthquake equal to or stronger than the 1994 Northridge earthquake could occur every 6.7 years in an area of the state.
Gulf Coast
The USGS also found a significant increase in the number of magnitude 3 earthquakes, including in states that have not traditionally been seismically active. Texas, Oklahoma, and Arkansas. In this case, the cause is “hydraulic failure.”
northwest
The region’s coastline is bounded by the Cascadia Fault, which extends from the Cascadia Fault. From Vancouver, Canada to Cape Mendocino, California, There is a risk of causing major earthquakes in cities such as Seattle, Tacoma, Portland, Eugene, Salem, Olympia.
There is a 33% chance that a strong earthquake will occur in the next 50 years. However, even small items can cause property damage or rupture.
south carolina
This patchy region of the east coast is Middleton Place – Somerville Seismic Zone, the Charleston area is likely to experience strong earthquakes over the next 50 years. ‘We are the center of attention on the East Coast’, seismologists warn steve jaume In 2014.
alaska south coast
Alaska is one of the most seismically active places in the world, accounting for 11 percent of the world’s earthquakes, with at least one reaching a magnitude of 7 to 8 degrees. Every 13 years, it averages more than 8° in magnitude.
New Madrid, Missouri
This region is affected by: New Madrid Fault Line in Missouri It is considered one of the most active seismic zones east of the Rocky Mountains, with approximately 200 low-intensity earthquakes occurring annually.
Hawaii
Hawaii is just outside the mainland. “Ring of Fire”, an area where intense tectonic activity is occurring. However, most of the earthquakes that occur each year are weak. It is estimated that an earthquake of 6 to 6.9 degrees occurs once every 7.7 years. Earthquakes with a magnitude of 7° or greater occur approximately every 56 years.
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