Natural Hazards

Filter Total Items: 495
Date published: October 23, 2019
Status: Active

U.S. Seismic Hazard Maps–Hawaii, Puerto Rico and the U.S. Virgin Islands, and Samoa and the Pacific Islands

Seismic hazard maps for Hawaii, Puerto Rico and the U.S. Virgin Islands, and Samoa and the Pacific Islands.

Date published: October 23, 2019
Status: Active

Vs30 Models and Data

The following resources are available for Vs30 (the time-averaged shear-wave velocity to 30 m depth) models and data.

Date published: October 21, 2019
Status: Active

Foreign Hazard Maps

  

Date published: October 17, 2019
Status: Completed

What if the ShakeAlert Earthquake Early Warning System Had Been Operating During the M6.9 1989 Loma Prieta Earthquake?

How will ShakeAlert® likely perform now on a large earthquake impacting a major urban area? How much warning will you get? To answer this, let’s do a thought experiment...

Date published: October 17, 2019
Status: Active

CoSMoS 3.1: Central California

CoSMoS v3.1 for central California shows projections for future climate scenarios (sea-level rise and storms)

Date published: October 17, 2019
Status: Active

Coastal Storm Modeling System (CoSMoS)

The Coastal Storm Modeling System (CoSMoS) makes detailed predictions of storm-induced coastal flooding, erosion, and cliff failures over large geographic scales. CoSMoS was developed for hindcast studies, operational applications and future climate scenarios to provide emergency responders and coastal planners with critical storm-hazards information that can be used to increase public safety...

Date published: October 11, 2019
Status: Active

Liquefaction Hazard Maps

Overview

Liquefaction is a phenomenon that is caused by earthquake shaking. Wet sand can become liquid-like when strongly shaken. The liquefied sand may flow and the ground may move and crack, causing damage to surface structures and underground utilities.

Date published: October 10, 2019
Status: Active

Urban Seismic Hazards

  

Date published: October 9, 2019
Status: Completed

2018 NSHM Update Workshop

March 7-8, 2018
Newark, CA
Risk Management Solutions Headquarters

The following links are to PDF versions of the workshop presentations. All workshop participants have granted permission to post their presentations. If you prefer, you can download all of the presentations in one...

Date published: October 9, 2019
Status: Active

Tweet Earthquake Dispatch

The USGS is offering earthquake alerts via two twitter accounts @USGSted and @USGSBigQuakes.

Date published: October 8, 2019
Status: Completed

Earthquake Early Warning – Fine-Tuning for Best Alerts

The goal of an earthquake early warning (EEW) system is to provide an alert to people and automatic systems after an earthquake begins but before the shaking reaches their location. As the USGS and its partners are developing an EEW system, called ShakeAlert®, for the West Coast, the benefits, costs, capabilities, and limitations are being investigated. Two recent studies explored the...