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Dig This — Geologic Map Day



Dig This — Geologic Map Day

Celebrate the inaugural “Geologic Map Day” on October 19, as a part of the Earth Science Week 2012 activities.

Geologic maps are important for education, science, business, and public policy concerns. Geologic Map Day will focus the attention of students, teachers, and the general public on the study, uses, and significance of these tools by engaging audiences through educational activities, print materials, online resources, and public outreach opportunities.

“Geologic maps have grown and evolved with the information age into multi-dimensional, interactive, online tools that far surpass what was previous possible in the days of static paper products,” said USGS Director Marcia McNutt. “They facilitate the integration of large data sets, ease the understanding of complex phenomenon, encourage frequent updates with new information, educate the next generation of brilliant minds, and promote the wise and efficient investment of public and private resources.”

Be sure to check out the Geologic Map Day poster included in this year’s Earth Science Week Toolkit. This poster provides a geologic map of the United States, plus step-by-step instructions for a related classroom activity.

Earth Science Week 2012 will be celebrated October 14-20.

Earth Science Week Toolkits can be ordered online or call AGI Publications at 703-379-2480.

For more information, visit the Geologic Map Day web page.

USGS Newsroom



More information

Parameter Value Description
Magnitude mb The magnitude for the event.
Longitude ° East Decimal degrees longitude. Negative values for western longitudes.
Latitude ° North Decimal degrees latitude. Negative values for southern latitudes.
Depth km Depth of the event in kilometers.
Place Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 1970-01-01 00:00:00 Time when the event occurred. UTC/GMT
Updated 1970-01-01 00:00:00 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status Indicates whether the event has been reviewed by a human.
Tsunami This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG A number describing how significant the event is. Larger numbers indicate a more significant event.
Network The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type The method or algorithm used to calculate the preferred magnitude for the event.
Event Type Type of seismic event.
Event ID Id of event.
Event Code An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS A comma-separated list of event ids that are associated to an event.

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