Earthquakes today

Current and latest world earthquakes breaking news, activity and articles today


Geological news

New Video/Images of Walrus Haulout



New Video/Images of Walrus Haulout

ANCHORAGE, Alaska – The USGS Alaska Science Center has released new high-resolution video of Pacific walruses hauling out near Point Lay, Alaska, in late August, 2011. 

Also available on the USGS Alaska Science Center walrus website are animations of the walruses’ movements as tracked by radio transmitters, and FAQs on the ongoing walrus studies.

Walruses spend most of their lives at sea, but haul out on sea ice and sometimes on land to rest between foraging bouts. When sea ice recedes past the continental shelf into the deep waters of the Arctic Basin, as it has in the past few summers, the walruses haul out on land, often in great numbers. USGS Alaska Science Center researchers, in cooperation with the Native Village of Point Lay, have been radio-tracking walruses’ movements to learn more about their response to the changing sea-ice conditions.

With increased awareness of the walrus haulouts comes the necessity of protecting the resting animals from human disturbance. Walruses face danger from stampedes when they gather on shore. The Fish and Wildlife Service, the Eskimo Walrus Commission, the North Slope Borough, and the Native Villages of Barrow and Point Lay are working with local hunters, pilots, operators of marine vessels, and the public to distribute guidelines that will protect the herds.

In April, Point Lay received an “Outstanding Partner” Award from the U.S. Fish and Wildlife Service Alaska Region for its work to protect walruses in September 2010, when tens of thousands of migrating walruses hauled out on the Chukchi Sea barrier beach within sight of the small Inupiaq community. Point Lay again took the initiative in late August, when the walruses again hauled out nearby. Community leaders took an Incident Command approach to protecting the walruses. They issued a news release and walrus photographs to reporters, but also requested that media crews not travel to Point Lay. When media did arrive, the leaders participated in interviews and advised visitors on how to get the stories they needed without disturbing the animals. Thus continued Point Lay’s long tradition of collaboration with science while showing respect for the thousands of weary animals resting nearby.

Female walruses and their young have come ashore during late summer and fall in four of the last five years on Alaska’s northwest coast. In 2010 and again late last month, thousands of walruses gathered on beaches north of Point Lay. More than 130 mostly young walruses were crushed in September 2009 at Alaska’s Icy Cape from a disturbance of unknown cause.

USGS may release additional video footage at a later date.

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.

Leave a Reply