Significant Earthquake Instructions: Under "Historical Seismic Events" you can toggle sets of placemarks which mark the location of significant earthquakes
that have occurred roughly within the last 100 years. Click on these placemarks for an info balloon with more detail on the event
and links to relevant web pages. Notice that for each set of earthquake markers selected for display, a corresponding list
will appear just below the control panel allowing alphabetical traversal of the events within their magnitude range.
Fault Map Instructions: This map, illustrating the faults of Southern California, is interactive.
Clicking on a fault trace (represented by the red lines on the map) will open an information balloon with the fault name,
a brief description of the fault's attributes, and links to pages providing in-depth information relevant to that selection.
Grab and drag the map to reposition (pan) the view. By clicking on the map to make it active, you can also pan
using the "up", "down", "left" and "right" arrow keys on your keyboard. To reposition the
map by 3/4 of its size, try pressing the "Page Up", "Page Down", "Home" and "End" keyboard keys.
To change the zoom level you can either use the "+/-" buttons in the upper-left corner of the map, use your mouse
to double-click on the map to zoom to that point or, alternately, use the "+" or "-" buttons on your keyboard while the
map is active. The "RESET" button re-initializes the map to its default position and zoom level. This will not close info
windows or delete any custom markers you may have placed there (see the "Control Panel" instructions using the link below).
To change the type of map you wish to view, click the arrow for the drop-down labeled "Terrain" to choose from "Terrain",
"Map" or "Satellite". In the lower-right corner of the map, clicking the arrow there will close the small overview map control.
For reference to seismological/ geological terminology, see the
Glossary
Switch to Control Panel Instructions
Control Panel Instructions: You can add your own custom placemarks to the map. In the "Name" field you can
optionally enter a meaningful name for your placemark which will appear as the title of the info balloon for that placemark. For
"Location" you may enter an address, a city name, a zip code, or even latitude/ longitude coordinates
(e.g. 34.021128, -118.284771). Press "Enter" on your keyboard or click the button labeled "Go" to
retrieve and display your placemark. You can add as many placemarks as you like. If your placemark cannot be found
you will be notified via a dialog. Right-click a placemark and select ""Delete Marker"" to remove it.
Checking the "Hide" or "Show" faults radio buttons will toggle on or off the entire set of fault traces.
The "Faults List" contains an alphabetical list of the faults featured on the map. Clicking a name in this list pans
to and opens an info balloon for that map.
Return to Fault Map Instructions
