Light earthquake, 4.7 mag strikes near Willow in Alaska

A light earthquake with magnitude 4.7 (ml/mb) was detected on Thursday, 21 kilometers (13 miles) from Willow in Alaska. The 4.7-magnitude earthquake has occurred at 06:07:16 / 6:07 am (local time epicenter). Unique identifier: us20006gdz. Ids that are associated to the event: at00oao4k4, us20006gdz, ak13790018. Exact time and date of earthquake 21/07/16 / 2016-07-21 14:07:16 / July 21, 2016 @ 2:07 pm UTC/GMT. Exact location of earthquake, longitude -150.407 West, latitude 61.659 North, depth = 44 km. The earthquake was roughly at a depth of 44 km (27 miles). A tsunami warning has been issued near Willow in Alaska (Does not indicate if a tsunami actually did or will exist).

Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Palmer, Gateway, Elmendorf Air Force Base. Country/countries that might be effected, United States (c. 310 233 000 pop). Epicenter of the earthquake was 56 km (35 miles) from Anchorage (c. 291 800 pop), 58 km (36 miles) from Eagle River (c. 24 800 pop), 46 km (28 miles) from Knik-Fairview (c. 14 900 pop), 58 km (36 miles) from Lakes (c. 8 400 pop), 52 km (32 miles) from Tanaina (c. 8 200 pop), 52 km (32 miles) from Wasilla (c. 7 800 pop), 43 km (27 miles) from Meadow Lakes (c. 7 600 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days three, in the past 30 days five and in the last 365 days seventy-nine earthquakes of magnitude 3.0 or greater that have been detected nearby. There are an estimated 13,000 light earthquakes in the world each year.

Did you feel it?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 21 km WSW of Willow, Alaska. This information comes from the USGS Earthquake Notification Service.

Alaska Anchorage Eagle River Elmendorf Air Force Base Gateway Knik-Fairview Lakes Meadow Lakes Palmer Tanaina United States Wasilla Willow

More information

Parameter	Value	Description
Magnitude	4.7 mb	The magnitude for the event.
Longitude	-150.407° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	61.659° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	44 km	Depth of the event in kilometers.
Place	21km WSW of Willow, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2016-07-21 14:07:16	Time when the event occurred. UTC/GMT
Updated	2016-07-21 14:46:18	Time when the event was most recently updated. UTC/GMT
Timezone offset	-480	Timezone offset from UTC in minutes at the event epicenter.
Felt	27	The total number of felt reports
CDI	3.8	The maximum reported intensity for the event.
MMI	2.9	The maximum estimated instrumental intensity for the event.
Alert Level	green	The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status	reviewed	Indicates whether the event has been reviewed by a human.
Tsunami	1	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	350	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	us	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,at,us,ak,	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	0.166	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	46	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	mb	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	us20006gdz	Id of event.
Event Code	20006gdz	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,at00oao4k4,us20006gdz,ak13790018,	A comma-separated list of event ids that are associated to an event.

Parameter

Value

Description

Magnitude

4.7 mb

The magnitude for the event.

Longitude

-150.407° West

Decimal degrees longitude. Negative values for western longitudes.

Latitude

61.659° North

Decimal degrees latitude. Negative values for southern latitudes.

Depth

44 km

Depth of the event in kilometers.

Place

21km WSW of Willow, Alaska

Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.

Time

2016-07-21 14:07:16

Time when the event occurred. UTC/GMT

Updated

2016-07-21 14:46:18

Time when the event was most recently updated. UTC/GMT

Timezone offset

-480

Timezone offset from UTC in minutes at the event epicenter.

Felt

The total number of felt reports

CDI

3.8

The maximum reported intensity for the event.

MMI

2.9

The maximum estimated instrumental intensity for the event.

Alert Level

green

The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.

Review Status

reviewed

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

350

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

,at,us,ak,

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

0.166

Horizontal distance from the epicenter to the nearest station (in degrees).

Root Mean Square

1 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

earthquake

Type of seismic event.

Event ID

us20006gdz

Id of event.

Event Code

20006gdz

An identifying code assigned by, and unique from, the corresponding source for the event.

Event IDS

,at00oao4k4,us20006gdz,ak13790018,

A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.7 mag strikes near Willow in Alaska

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