Pacific Coastal and Marine Science Center

Earthquakes and Faults

Filter Total Items: 18
Date published: August 23, 2021
Status: Active

Cascadia Subduction Zone Marine Geohazards

Societal Issue: Uncertainty related to rupture extent, slip distribution, and recurrence of past subduction megathrust earthquakes in the Pacific Northwest (northern CA, OR, WA, and southern BC) leads to ambiguity in earthquake and tsunami hazard assessments and hinders our ability to prepare for future events.

Date published: July 30, 2021
Status: Active

U.S. West Coast and Alaska Marine Geohazards

Marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. Such underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis.

Devastating earthquakes in Japan (2011) and Chile (2010) that spawned pan-oceanic tsunamis sent a sobering reminder that U.S. coastlines are also vulnerable to natural disasters that originate in...

Date published: April 29, 2021
Status: Active

Probabilistic Forecasting of Earthquakes, Tsunamis, and Earthquake Effects in the Coastal Zone

The nation's coastlines are vulnerable to the interrelated hazards posed by earthquakes, landslides, and tsunamis. In the marine environment these events often occur in concert, and distant triggers can cause severe local effects, making the issue global in scope. As the population continues to migrate toward the coastlines, the social impacts of these hazards are expected to grow.

Date published: April 12, 2021
Status: Active

Mini GI seismic source

Seismic source for marine reflection surveys

Date published: April 8, 2021
Status: Active

Streamer Depth Control Birds

The Geospace Navigator bird is a streamer depth control device, used with a high-resolution seismic system to regulate and record the depth of the streamer.

Date published: April 1, 2021
Status: Active

High-Resolution Multichannel Seismic System

Description of the high-resolution multichannel seismic system at the Marine Facility (MarFac) of the USGS Pacific Coastal and Marine Science Center, for seafloor mapping

Date published: November 5, 2020
Status: Active

Core X-Ray: 3-D CT Core Imaging Laboratory

The Geotek RXCT, a "rotating x-ray computed tomography" system, creates ultra high-resolution imagery of sediment cores. The system resides at the USGS Pacific Coastal and Marine Science Center in Santa Cruz, California. It requires the operator to take specialized training and hold X-ray radiation and safety certifications.

Date published: November 2, 2020
Status: Active

Earthquake Hazards in Southeastern Alaska

Over the last 100 years, the Queen Charlotte-Fairweather fault system has produced large-magnitude earthquakes affecting both Canada and the U.S. To fill in missing details about its offshore location and structure, USGS uses sophisticated techniques to truly understand the fault’s hazard potential.

Contacts: Danny Brothers
Date published: July 15, 2020
Status: Active

Tsunami and Earthquake Research

Here you will find general information on the science behind tsunami generation, computer animations of tsunamis, and summaries of past field studies.

Contacts: Eric Geist
Date published: December 11, 2019
Status: Completed

Tsunami Record from the Great 1906 San Francisco Earthquake

Shortly after the Great San Francisco earthquake of April 18, 1906, a sea level disturbance (tsunami) was recorded at the Presidio tide gauge station in San Francisco (the station is now located nearby at Ft. Point). What type of mechanism (earthquake rupture, landslide, other) generated the tsunami...

Contacts: Eric Geist
Date published: November 26, 2019
Status: Active

Tsunami Field Studies

Our tsunami scientists work on international teams to study the aftermath of tsunamis around the world, to gain a better understanding the impact of potential tsunamis on coastal communities of the United States. Their work helps inform local, state, and federal coastal planning, protection, and resiliency.

Date published: March 20, 2019
Status: Completed

Preliminary Analysis of the April 2007 Solomon Islands Tsunami, Southwest Pacific Ocean

The tsunami that was triggered by a magnitude 8.1 earthquake on April 1, 2007, in the Solomon Islands caused significant damage and loss of life. In the hopes that disasters such as this can be avoided in the future, we attempt to understand the mechanism and impact of this tsunami. The information presented here is focused on geologic aspects of the disaster.

Contacts: Eric Geist