Intro

REQ2 (Recent Earthquakes 2) is an interactive product that utilizes Google Maps to display recent Northwest seismicity. All plotted earthquakes are no more than two-weeks old. Earthquakes can be plotted in two ways: By time or depth. Additionally, earthquakes can be plotted by magnitude(s). Each time the plot changes, the list below the Control Panel will reflect the changes.

REQ2 also allows you to plot current Webicorders on the map and to view a selected earthquake's Webicorder.

Navigating REQ2

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REQ2 has four sections: The Map, The Control Panel, The List, and The Legend.

Map

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All earthquakes and Webicorders are plotted on top of a Google Map. In the top-right corner of the map are three buttons that let you choose which type of base map you would like. Choices are Terrain, Satellite, or Map(roads). By default the Terrain map is loaded.

In the top-left corner of the Google Map are the navigation tools. The arrows and zoom controls are standard Google Maps navigation tools.

Control Panel

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The Control Panel can be divided into two sections: magnitude controls on the left and Webicorders on the right. By default all recent earthquakes are plotted by time. The earthquakes can also be plotted by depth. When the time/depth plot is changed, the map is reset to plot all earthquakes and any plotted Webicorders are cleared. Magnitude ranges can be plotted or hidden by using the check boxes.

Webicorders can be plotted by type. When the plotted Webicorder icon is clicked, the station's most recent activity can be viewed.

It is also possible to view Webicorders of a particular earthquake. To do this, first check the type(s) of Webicorders you would like to view, and then select the earthquake you are interested in on either the map or the List box. A list of Webicorders, sorted by distance from the earthquake, will be created in the "Event Webicorders" select list under the Webicorder check boxes.

List

All earthquakes plotted on the map can also be found in the list box with the most recent earthquakes at the top. Earthquakes greater than magnitude 3 are listed in a red font.

Legend

The legend will change when the Time/Depth buttons are toggled. Non-network events, plotted as boxes, are earthquakes that occurred outside of the PNSN authoritative boundary, which is all of Washington and Oregon State and just off the West Coast.