Landsat Imagery Tracks Record Flooding in Minot, N.D.

The Landsat 7 satellite recorded the flooding of the city of Minot, North Dakota, at its peak on June 25, 2011, when the Souris River in north central North Dakota surpassed an 1881 record flood reading by a wide margin.

The city of Minot, divided by the river, has been especially hard hit by the flooding which is due to unusually heavy rainfall in southern Canada and North Dakota. The river has inundated over 4,000 homes and forced over 11,000 residents to evacuate.

The Souris River reading at Minot’s Broadway Bridge around 11:00 p.m. on June 25 reached nearly four feet higher than the all-time high set in 1881.

Landsat is a joint effort of both USGS and NASA. USGS conducts Landsat operations and NASA develops and launches new satellites that meet USGS requirements. In addition to imagery of natural hazard events, Landsat provides valuable data for land use research and advances the Department of the Interior’s important role in land remote sensing under the President’s National Space Policy. Landsat images are unique in that they provide complete global coverage, they are available for free, and they span nearly 40 years of continuous earth observation. No other satellite imagery has that combination of attributes.

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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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Landsat Imagery Tracks Record Flooding in Minot, N.D.

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