New Film — Lake of the Sky: USGS Tahoe Basin Science

MENLO PARK, Calif. — On Aug. 16, the USGS will debut a new film, “Lake of the Sky: USGS Tahoe Basin Science,” on scientific research in the Lake Tahoe Basin at the 15th Annual Lake Tahoe Summit “Stewardship and Sustainability in Challenging Fiscal Times” sponsored by Senator Diane Feinstein, at Homewood Mountain Ski Resort in California.

The twelve-minute movie by USGS Video Producer Stephen M. Wessells features USGS science activities beginning in 1895 and continues through research being conducted today by hydrologists, geologists, geographers, computer modelers, and biologists.

The video showcases a broad range of USGS science, including water quality monitoring, streamgaging, Lake Tahoe bathymetry, aerial LIDAR, historic use of aerial photography, and the Tahoe Land Use Simulation Model. This wide range of consistent, reliable, long-term data and maps are crucial for evaluating and maintaining the ecosystem health of the lake and basin.

This nontechnical, educational film will be available on the USGS website as well as on various video sharing websites.

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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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New Film — Lake of the Sky: USGS Tahoe Basin Science

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