The 2023 National Seismic Hazard Model: What's Shaking
50-State Update of the US National Seismic Hazard Model (NSHM) Defines the Potential for Seismic Hazards
By Communications and Publishing | January 16, 2024
USGS scientists and their partners have recently updated the National Seismic Hazard Model (NSHM), providing a comprehensive assessment of the potential for seismic hazards across the United States. This 50-state update represents a significant advancement in understanding and characterizing earthquake risks, with implications for building codes, land-use planning, and emergency preparedness measures.
The NSHM is a probabilistic model that estimates the likelihood of ground shaking at various locations and intensities throughout the country. It is based on an analysis of historical earthquake data, geological information, and advanced computational techniques. By combining these elements, the model provides a detailed and scientifically informed assessment of seismic hazards that can be used for a variety of purposes, including:
- Developing building codes and seismic design standards
- Assessing the vulnerability of infrastructure and critical facilities
- Informing land-use planning and zoning decisions
- Creating earthquake preparedness plans and emergency response strategies
The 2023 update of the NSHM incorporates the latest scientific findings and data, resulting in a more accurate and reliable model than previous versions. It also includes several enhancements that make it more user-friendly and accessible, including interactive mapping tools and online data visualization capabilities.
The NSHM is a critical tool for understanding and mitigating seismic hazards in the United States. By providing a comprehensive and up-to-date assessment of potential earthquake risks, the model helps communities and individuals make informed decisions to reduce their vulnerability to these natural disasters.
If the Ground Starts to Shake, Will You Be Ready?
While California has experienced some of the most severe earthquakes in recent history, it is important to remember that seismic hazards exist in all parts of the United States. The 2023 NSHM provides a valuable resource for assessing the risks in your area and taking steps to prepare for potential earthquakes.
There are several simple steps you can take to increase your earthquake preparedness, including:
- Create an earthquake preparedness plan
- Secure heavy objects in your home
- Stockpile food, water, and medical supplies
- Practice earthquake drills with your family
- Stay informed about earthquake risks in your area
By taking proactive measures, you can help ensure your safety and well-being in the event of an earthquake. For more information on earthquake preparedness and the 2023 NSHM, visit the USGS website.
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