About Seismic Monitor
allows you to monitor global
earthquakes in near real-time, visit seismic stations around the
world, and search the web for earthquake headlines or region-related information.
The buttons below the map provide Help, Headlines, Latest Earthquakes List, Notable Recent Quakes, Plate Tectonics, and other Education Resources.
The blue Zoom Maps buttons to the right side take you to zoom region maps, in the same window.
The date and time of the map (in Universal Time)
are located in the lower right hand corner.
|Earthquakes are shown as colored circles, where the size of the
circle tells you the magnitude of the quake, using the legend at
the top left of the map. Only earthquakes of magnitude 4.0 or
greater are displayed.
| Age of Earthquake
| the last 24 hours <--
animates briefly when page is loaded
| from 24 to 48 hours
| from 3 days to 2 weeks
| from 2 weeks up to 5 years
|The distribution of earthquakes over
the past 5 years is represented by the purple colored dots
and demonstrates how earthquakes define the boundaries of tectonic
plates, as well as the relationship between topography and earthquakes.
|The Earth's shadow shows the line
between day and night as well as the progression of the seasons.
How to Use Seismic Monitor
|Click anywhere on the world map to open a zoom map for the region
you clicked in. From that window you can click in the center of earthquake
circles to get a list of recent earthquakes in that vicinity, or
click on observatory stations (the small blue triangles) to bring
up station information pages.
Buttons at the bottom of map include:
1) Return to the main World Earthquake Map
2) The 30 most recent earthquakes on this zoom map.
3) Go to another region of the world in this same window.
|If you click on the Google checkbox, in a zoom map
window only, Google search mode is enabled.
When enabled, clicking on areas which are not earthquakes executes
a search for information relating to seismicity and plate tectonics
for the geographic placename you clicked on.
See a live example of earthquake news and info for the N. Pacific
|Passing the mouse over the zoom map without
clicking displays the names of geographic features as well as the
times and locations of the earthquakes passed over.
Clicking directly on an earthquake brings up a list of recent earthquakes within 10 degrees distance from that earthquake.
Capabilities on the earthquake list include
Sorting by one or more columns by clicking on their headers,
1) Seeing a powerful, interactive map of the chosen earthquake and others nearby, and
2) Access to all sorts of tools and resources IRIS has relating to the chosen earthquake
Back on the main world map screen, you can also open a jumbo-sized
map by pressing the
"See Large Screen View" button:
The jumbo map has no interactive capabilities.
It is meant for unattended display on a larger monitor in browser
Seismic Monitor is updated every 20 minutes (jumbo-sized map
Left unattended your browser will automatically reload the page at
about the same interval.
Earthquake data are provided by the USGS
National Earthquake Information Center .
Best viewed with: IE 8+, and recent versions of Chrome, Safari and Firefox. Not tested in IE10.
We welcome your comments
and your suggestions. Please
send them to the administrator