Go to WSRB
Go to BuildingMetrix

About the Company

Who we are and how we serve insurers, agents, and Washington state residents.  

CEO Perspective

Engaging thought leadership on key insurance industry issues from our CEO. 

Meet the Team

Get to know the team behind WSRB’s trusted data and excellent customer service. 


Learn about the benefits of working at WSRB and apply for open positions.  

Underwriting Property

A guide to key risks in Washington state: fire, wildfire, and earthquakes.

Help Center

Self-serve articles on how to use our products. Available 24/7. 

Commercial Property

Information on loss costs, policy rating, and assessment tools 

Industry Toolkit

Links to help you work smarter and serve your customers.  

Protection Classes

The evaluation process explained from start to finish.


News on emerging risks as well as our latest products. 


In-depth content on essential insurance topics.


Weekly newsletter covering the P/C industry, curated by our experts. 


Tsunami Inundation Maps for Insurance Underwriting

August 6, 2012

Tsunami inundation maps have become a critical tool to help plan evacuation routes and hazard mitigation, and pinpoint the locations of structures and populations most likely to be affected in the event of a tsunami.

Have you ever wondered how these locations are determined? The answer is probably much more complex than you imagine. 

Intricate computer models are used to create tsunami inundation maps based on bathymetry (the measure of depths of bodies of water), topography, seismological studies, empirical evidence, and more.

Standard tsunami inundation mapping uses the Method of Splitting Tsunami (MOST) model, a set of numerical simulation codes. The MOST model addresses the three stages of tsunami development: generation by an earthquake, transoceanic propagation, and inundation of dry land. This information can be used to develop faster, more reliable data in the event of an offshore earthquake.

A tsunami (tidal wave) hits a lighthouseIn the event of a tsunami, knowing as much information as possible
can help to mitigate harm and damage.


Underwriting Property: A Guide to Fire, Wildfire and Earthquake Risk


How can insurers use tsunami map data?

Insurers can use the data provided by tsunami inundation maps to assess the risk of an exact location to help them to provide the right coverage to the right customers. In the event of an offshore earthquake, the maps also provide valuable information for insurers to assess the likely locations and severity of inundation so that they can begin organizing and allocating resources to the areas and customers who will need them, potentially hours before a tsunami even reaches land.

Though current tsunami inundation maps are still imperfect and cannot account for every scenario, the data they provide is proving to be a valuable tool to those in the insurance industry. Particularly for those of us in the Northwest, this is becoming an increasingly critical issue.

You can quickly and easily determine whether any location in Washington state has been mapped for tsunami risk and, if it has, whether it's at risk of inundation. Just login to WSRB.com to try our Earthquake Risks Tool today. For detailed instructions on how to use it, click here.

More earthquake content



Like our blog? Check out InsuranceEDGE. We curate the week’s must-read stories from top industry sources. You stay informed and save time.


You May Also Like

These stories on underwriting property

blog listing blog sign up

Sign up for our blog