This hazard map is a simplified 2% in 50-year probability of exceedance map for fixed VS30 760 m/s.
What are the earthquake hazards/risks where I live?
Determining your risk with regard to earthquakes, or more precisely shaking from earthquakes, isn't as simple as finding the nearest fault. The chances of experiencing shaking from an earthquake and/or having property damage is dependent on many different factors. The National Hazard Maps use all available data to estimate the chances of shaking (of different strengths and frequencies) across the U.S., but a probability is the best anyone can do.
Currently, the best way for you to gather information about your earthquake risk is to select your state from the list on Earthquake Information by State (scroll down page a bit) and investigate the information provided under each link for your area. The USGS is not able to advise you regarding any individual issues, but we do make available all the information we have in order for you or your professional representative to make an informed decision.
Related
What is a seismic zone, or seismic hazard zone?
Although you may hear the terms “seismic zone” and “seismic hazard zone” used interchangeably, they really describe two slightly different things. A seismic zone is used to describe an area where earthquakes tend to focus; for example, the New Madrid Seismic Zone in the Central United States. A seismic hazard zone describes an area with a particular level of hazard due to earthquakes. Typically, a...
What is seismic hazard? What is a seismic hazard map? How are they made? How are they used? Why are there different maps, and which one should I use?
Seismic hazard is the hazard associated with potential earthquakes in a particular area, and a seismic hazard map shows the relative hazards in different areas. The maps are made by considering what we currently know about: Past faults and earthquakes The behavior of seismic waves as they travel through different parts of the U.S. crust The near-surface site conditions at specific locations of...
How will my house hold up in an earthquake? Can the USGS send someone out to evaluate my property?
Published maps will only provide generalized, uninterpreted information about specific areas. Every property consists of a unique combination of geologic and structural factors that must be considered to determine what might happen to a house during an earthquake. Therefore, an individual site study is necessary. Geologic factors include: type of underlying material, depth to bedrock, depth of...
How do I decide whether or not to get earthquake insurance?
You should consider the following factors when deciding whether or not to get earthquake insurance: proximity to active earthquake faults seismic history of the region (frequency of earthquakes) time since last earthquake building construction (type of building and foundation) architectural layout materials used quality of workmanship extent to which earthquake resistance was considered by the...
How do earthquakes affect buildings?
Ground shaking is the primary cause of earthquake damage to man-made structures. Many factors influence the strength of earthquake shaking at a site including the earthquake's magnitude, the site's proximity to the fault, the local geology, and the soil type. More than 250 structures throughout the United States have been outfitted with seismic sensors by the USGS National Strong Motion Project...
What is the likelihood of a large earthquake at location X? Is it safe to go to X since they've been having a lot of earthquakes lately?
The National Seismic Hazards Mapping project provides an online Web tool for determining the probability of a large earthquake within 50 kilometers (~31 miles) of a specific location in the United States over a certain time period. The calculation is based on the latest available information from seismic hazard data. However, asking if it's safe to travel somewhere because of recent earthquakes is...
What is the probability that an earthquake is a foreshock to a larger earthquake?
Around the world, the likelihood that an earthquake will be followed by a larger earthquake nearby and within a week is about 5%. When an earthquake occurs, it can trigger other earthquakes nearby in what seismologists call an earthquake sequence. In most sequences, these later earthquakes will be smaller than the first one. The first, largest earthquake is called the mainshock and the later...
What is the difference between earthquake early warning, earthquake forecasts, earthquake probabilities, and earthquake prediction?
The USGS uses these four terms to refer to four different things. Early warning is a notification that is issued after an earthquake starts. Probabilities and forecasts are comparable to climate probabilities and weather forecasts, while predictions are more like statements of when, where, and how large, which is not yet possible for earthquakes. Here are more detailed descriptions of each...
How do I get earthquake hazard maps for locations outside of the U.S.?
The USGS has seismic hazard maps for the US, Alaska, Hawaii, Puerto Rico & U.S. Virgin Islands, Guam & Marianas and Samoa & Pacific Islands. In addition, we have created some other Foreign Hazard Maps for Afghanistan, Haiti, South America, Southeast Asia and the State of Gujarat, India. For more information about hazard maps for other locations outside of the U.S. visit the GEM (Global Earthquake...
How are engineers working to make roads and buildings safer?
Earthquake engineers are working to make roads and buildings safer in the event of major earthquakes. This includes both improving the design of new buildings and bridges as well as strengthening older units to incorporate the latest advances in seismic and structural engineering. The Federal Emergency Management Agency plays a central role in funding research and development for the purpose of...
What is the USGS doing to mitigate and respond to earthquake hazards?
The U.S. Geological Survey performs the following functions related to earthquake hazard mitigation: Receives, analyzes, maintains, and distributes data on earthquake activity worldwide. Satellites link our National Earthquake Information Center in Golden, Colorado to a network of seismograph stations. These stations, located throughout the world, are maintained by the U.S. Geological Survey...
Are there geologic maps or publications for where I live?
Detailed geologic mapping has not been completed for the entire United States, but maps are available for most locations. Geologic maps at many scales and from many sources are listed in the National Geologic Map Database. Some geologic maps can be purchased in hard copy through the USGS Store. Download digital geologic maps for entire states from the USGS Mineral Resources Online Geospatial Data...
Hazard map from the 2023 50-state update of the National Seismic Hazard Model Project
This hazard map is a simplified 2% in 50-year probability of exceedance map for fixed VS30 760 m/s.
Fault sections being used in the creation of the 2023 U.S. Seismic Hazard Maps
Fault sections being used in the creation of the 2023 U.S. Seismic Hazard Maps. Blue lines are normal faults, yellow lines are reverse faults, and red lines are strike-slip faults.
Fault sections being used in the creation of the 2023 U.S. Seismic Hazard Maps. Blue lines are normal faults, yellow lines are reverse faults, and red lines are strike-slip faults.
PubTalk 1/2018 — ShakeAlert: Path to West Coast EQ Early Warning
Title: ShakeAlert: The Path to West Coast Earthquake Early Warning ... how a few seconds can save lives and property
Title: ShakeAlert: The Path to West Coast Earthquake Early Warning ... how a few seconds can save lives and property
Seismic hazard for the State of Hawaii based on past earthquakes an...
Seismic hazard across the State of Hawaii, with high seismic hazards depicted with warm colors (red-orange) and relatively low seismic hazards depicted with cool colors (green). Engineers use these types of maps to prescribe building codes known as Seismic Design Codes (SDC) and create earthquake resistant structures.
Seismic hazard across the State of Hawaii, with high seismic hazards depicted with warm colors (red-orange) and relatively low seismic hazards depicted with cool colors (green). Engineers use these types of maps to prescribe building codes known as Seismic Design Codes (SDC) and create earthquake resistant structures.
Related
What is a seismic zone, or seismic hazard zone?
Although you may hear the terms “seismic zone” and “seismic hazard zone” used interchangeably, they really describe two slightly different things. A seismic zone is used to describe an area where earthquakes tend to focus; for example, the New Madrid Seismic Zone in the Central United States. A seismic hazard zone describes an area with a particular level of hazard due to earthquakes. Typically, a...
What is seismic hazard? What is a seismic hazard map? How are they made? How are they used? Why are there different maps, and which one should I use?
Seismic hazard is the hazard associated with potential earthquakes in a particular area, and a seismic hazard map shows the relative hazards in different areas. The maps are made by considering what we currently know about: Past faults and earthquakes The behavior of seismic waves as they travel through different parts of the U.S. crust The near-surface site conditions at specific locations of...
How will my house hold up in an earthquake? Can the USGS send someone out to evaluate my property?
Published maps will only provide generalized, uninterpreted information about specific areas. Every property consists of a unique combination of geologic and structural factors that must be considered to determine what might happen to a house during an earthquake. Therefore, an individual site study is necessary. Geologic factors include: type of underlying material, depth to bedrock, depth of...
How do I decide whether or not to get earthquake insurance?
You should consider the following factors when deciding whether or not to get earthquake insurance: proximity to active earthquake faults seismic history of the region (frequency of earthquakes) time since last earthquake building construction (type of building and foundation) architectural layout materials used quality of workmanship extent to which earthquake resistance was considered by the...
How do earthquakes affect buildings?
Ground shaking is the primary cause of earthquake damage to man-made structures. Many factors influence the strength of earthquake shaking at a site including the earthquake's magnitude, the site's proximity to the fault, the local geology, and the soil type. More than 250 structures throughout the United States have been outfitted with seismic sensors by the USGS National Strong Motion Project...
What is the likelihood of a large earthquake at location X? Is it safe to go to X since they've been having a lot of earthquakes lately?
The National Seismic Hazards Mapping project provides an online Web tool for determining the probability of a large earthquake within 50 kilometers (~31 miles) of a specific location in the United States over a certain time period. The calculation is based on the latest available information from seismic hazard data. However, asking if it's safe to travel somewhere because of recent earthquakes is...
What is the probability that an earthquake is a foreshock to a larger earthquake?
Around the world, the likelihood that an earthquake will be followed by a larger earthquake nearby and within a week is about 5%. When an earthquake occurs, it can trigger other earthquakes nearby in what seismologists call an earthquake sequence. In most sequences, these later earthquakes will be smaller than the first one. The first, largest earthquake is called the mainshock and the later...
What is the difference between earthquake early warning, earthquake forecasts, earthquake probabilities, and earthquake prediction?
The USGS uses these four terms to refer to four different things. Early warning is a notification that is issued after an earthquake starts. Probabilities and forecasts are comparable to climate probabilities and weather forecasts, while predictions are more like statements of when, where, and how large, which is not yet possible for earthquakes. Here are more detailed descriptions of each...
How do I get earthquake hazard maps for locations outside of the U.S.?
The USGS has seismic hazard maps for the US, Alaska, Hawaii, Puerto Rico & U.S. Virgin Islands, Guam & Marianas and Samoa & Pacific Islands. In addition, we have created some other Foreign Hazard Maps for Afghanistan, Haiti, South America, Southeast Asia and the State of Gujarat, India. For more information about hazard maps for other locations outside of the U.S. visit the GEM (Global Earthquake...
How are engineers working to make roads and buildings safer?
Earthquake engineers are working to make roads and buildings safer in the event of major earthquakes. This includes both improving the design of new buildings and bridges as well as strengthening older units to incorporate the latest advances in seismic and structural engineering. The Federal Emergency Management Agency plays a central role in funding research and development for the purpose of...
What is the USGS doing to mitigate and respond to earthquake hazards?
The U.S. Geological Survey performs the following functions related to earthquake hazard mitigation: Receives, analyzes, maintains, and distributes data on earthquake activity worldwide. Satellites link our National Earthquake Information Center in Golden, Colorado to a network of seismograph stations. These stations, located throughout the world, are maintained by the U.S. Geological Survey...
Are there geologic maps or publications for where I live?
Detailed geologic mapping has not been completed for the entire United States, but maps are available for most locations. Geologic maps at many scales and from many sources are listed in the National Geologic Map Database. Some geologic maps can be purchased in hard copy through the USGS Store. Download digital geologic maps for entire states from the USGS Mineral Resources Online Geospatial Data...
Hazard map from the 2023 50-state update of the National Seismic Hazard Model Project
This hazard map is a simplified 2% in 50-year probability of exceedance map for fixed VS30 760 m/s.
This hazard map is a simplified 2% in 50-year probability of exceedance map for fixed VS30 760 m/s.
Fault sections being used in the creation of the 2023 U.S. Seismic Hazard Maps
Fault sections being used in the creation of the 2023 U.S. Seismic Hazard Maps. Blue lines are normal faults, yellow lines are reverse faults, and red lines are strike-slip faults.
Fault sections being used in the creation of the 2023 U.S. Seismic Hazard Maps. Blue lines are normal faults, yellow lines are reverse faults, and red lines are strike-slip faults.
PubTalk 1/2018 — ShakeAlert: Path to West Coast EQ Early Warning
Title: ShakeAlert: The Path to West Coast Earthquake Early Warning ... how a few seconds can save lives and property
Title: ShakeAlert: The Path to West Coast Earthquake Early Warning ... how a few seconds can save lives and property
Seismic hazard for the State of Hawaii based on past earthquakes an...
Seismic hazard across the State of Hawaii, with high seismic hazards depicted with warm colors (red-orange) and relatively low seismic hazards depicted with cool colors (green). Engineers use these types of maps to prescribe building codes known as Seismic Design Codes (SDC) and create earthquake resistant structures.
Seismic hazard across the State of Hawaii, with high seismic hazards depicted with warm colors (red-orange) and relatively low seismic hazards depicted with cool colors (green). Engineers use these types of maps to prescribe building codes known as Seismic Design Codes (SDC) and create earthquake resistant structures.
Updated Date: February 25, 2025