Earthquake information sources

A 2004 map showing every Richter magnitude 1.5 to 7 earthquake in the Bay Area (67, 750 of them) from 1970 to 2003 is at:

Online, phone and library videos sources
The Association of Bay Area Governments has a lot of info (earthquake hazards maps and information, including estimate of levels of disruption to transportation systems – look up your neighborhood, and your route to work or school) at:

(see maps at ABAG website
Start with — HAZARD VIEWER but note that it has said: “Note that due to the complexity of the maps, each layer may take some time to load.”

You can find detailed maps (with zoom in capability) of potential road closures, risk of liqufaction and flooding (including if a local dam fails during a quake), such as this map of potential Bay Area road closures after a San Andreas fault 7.2 quake,

road closures san andreas fault 7.2 quake: map showing potential road closures in Santa Clara county after a san andreas fault 7.2 quake

Especially useful

–On Shaky Ground– Ground shaking hazard maps for Bay Area cities,

–Preparing for Traffic– maps and safety tips for driving in traffic after disasters

— Hazmat Incidents and Dam Failure– click on the links that take you to dam failure and see if your home could be flooded after a quake

You can type in an address and see (not completely accurately, but roughly) where flooding will occur during/after a Tsanami at: (You might have to click on the Tsunami Hazard Area box at the top.)

The PG&E guide with lots of pictures, on how and when to turn off your gas is at:
You might want to print a copy of it.

The City of San Leandro has extensive material. Go to

and search for earthquake

USGS earthquake info link

topics at the USGS site:

Dictionary of Earthquake Terms; Current Earthquake Information;

Common Myths about Earthquakes (including the misguided “triangle of life”, animals predicting quakes, position of the moon and planets);

Earthquakes, Faults, Plate Tectonics, Earth Structure;

Measuring Earthquakes; Seismographs;

Earthquake Effects & Experiences;

Probabilities, Seismic Hazard & Earthquake Engineering;

Earthquake Prediction (with links to a dozen scientific studies);

Historic Earthquakes and Earthquake Statistics;

Nuclear Explosions and Seismology;

Regionally-specific Earthquake Information; Earthquake Preparedness


Did You Feel It? is a website where you can look to see if that really was an earthquake you felt, and where you can report one. You select from regions: California, Alaska, Hawaii, Western Mountain, Pacific Northwest, Northeast, Central US, Puerto Rico & US Territories, and Other countries.

The site says: “This is a U.S. Geological Survey project to collect information about ground shaking following significant earthquakes. You can help us by filling out a questionnaire for each earthquake you feel. A Community Internet Intensity Map will be made and updated every few minutes following a major earthquake. At first only a few ZIP codes will have intensities assigned, but over time others will be assigned as data comes in. Check back often and watch the maps change!”


A family (and babysitters, caregivers, overnight guests) disaster plan is at:

Disaster planning


As a part of preparing for the next earthquake, do a what if? survey of your home, crawl space, attic . .

earthquake home hazards survey


Helping Children Cope With Disaster

Disaster Supplies

Store water for after an earthquake

Babysitter Consent and Contact Form

Fast, easy, cheap earthquake preparedness

hazardous household chemical mixtures

Home Fire Safety Checklist

Earthquake and pets advice (Consider having the vet ‘microchip’ your pets, and more…)

one edge of an ocean swell as a narrow bar
Call 1-800-480-2520 to get a copy of ‘Are you ready? A guide to citizen preparedness’ with some of the above information and technological and man-made hazards including national security emergencies.

a narrow band of sunset clouds

Video – available on the Santa Clara County Library system – and legal to copy for your
own personal use.

An Ounce Of Prevention: Strengthening Your Wood Frame House For Earthquake

by the Bay Area Regional Earthquake Preparedness Project

library # V.C.693.852 Ounce

The phone number listed on the video to get information mailed to you from the Calif.
Office of Emergency Services has changed – it is now (510) 286-0873. They’ll send you a
big packet of home and/or business preparedness tips.

Video Earthquake: Home Safe Home, by the Owner-Builder Center
library # V.C. 693.852 Earthquake


a narrow band of sunset reflected on the water

An earthquake early warning alarm system could give people seconds to ten of seconds warning of a major quake. Transit trains could be stopped, fire and ambulance services alerted, and warnings could be sent to home computers and cell phones in the region. Traffic lights could all be made to turn red, stopping traffic before a bridge or a busy intersection. Nuclear power plants could stop operations and refineries could isolate tanks and vulnerable pipelines. People could duck, cover and hold on instead of being knocked off their feet.

Yes, there could be false alarms, but practice at getting under a desk is worthwhile.

Japan has a working system.

thin line of gray colors made from a clouds photo

myths about earthquakes

The author of this webpage, (written as a homework reading assignment for my students), does not give any warranty, expressed or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, product, or process included in this website or at websites linked to or from it. Users of information from this website assume all liability arising from such use.