Light earthquake: M4.6 quake has struck near Big Lake in Alaska

A light earthquake magnitude 4.6 (ml/mb) has struck on Monday, 14 kilometers (9 miles) from Big Lake in Alaska. A tsunami warning has been issued near Big Lake in Alaska (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 18.8 km (12 miles) below the earth’s surface. Event ids that are associated to the earthquake: ak01929bgwg5, at00pn4sol. Id of event: ak01929bgwg5. Exact location of event, depth 18.8 km, -149.9711° West, 61.3905° North. Date and time of earthquake in UTC/GMT: 18/02/19 / 2019-02-18 17:02:45 / February 18, 2019 @ 5:02 pm. The 4.6-magnitude earthquake was detected at 08:02:45 / 8:02 am (local time epicenter).

Closest city/cities/towns to epicentrum/hypocenter was Palmer, Gateway, Lakes (min 5000 pop). Close country/countries that might be effected, United States (c. 310 233 000 pop). Epicenter of the event was 20 km (12 miles) from Anchorage (c. 291 800 pop), 23 km (14 miles) from Eagle River (c. 24 800 pop), 24 km (15 miles) from Knik-Fairview (c. 14 900 pop), 43 km (26 miles) from Lakes (c. 8 400 pop), 39 km (24 miles) from Tanaina (c. 8 200 pop), 35 km (22 miles) from Wasilla (c. 7 800 pop), 33 km (20 miles) from Meadow Lakes (c. 7 600 pop).

Each year there are an estimated 13,000 light quakes in the world. In the past 24 hours, there have been one, in the last 10 days seven, in the past 30 days twenty-two and in the last 365 days five hundred and eighteen earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 14 km S of Big Lake, Alaska. This information comes from the USGS Earthquake Notification Service.

Alaska Anchorage Big Lake Eagle River Gateway Knik-Fairview Lakes Meadow Lakes Palmer Tanaina United States Wasilla

More information

Parameter	Value	Description
Magnitude	4.6 mb	The magnitude for the event.
Longitude	-149.9711° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	61.3905° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	18.8 km	Depth of the event in kilometers.
Place	14km S of Big Lake, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2019-02-18 17:02:45	Time when the event occurred. UTC/GMT
Updated	2019-02-18 17:09:45	Time when the event was most recently updated. UTC/GMT
Timezone offset	-540	Timezone offset from UTC in minutes at the event epicenter.
Felt	11	The total number of felt reports
CDI	3.1	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	automatic	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	329	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	ak	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,ak,at,	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	0.68 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	ml	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	ak01929bgwg5	Id of event.
Event Code	01929bgwg5	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak01929bgwg5,at00pn4sol,	A comma-separated list of event ids that are associated to an event.

Parameter

Value

Description

Magnitude

4.6 mb

The magnitude for the event.

Longitude

-149.9711° West

Decimal degrees longitude. Negative values for western longitudes.

Latitude

61.3905° North

Decimal degrees latitude. Negative values for southern latitudes.

Depth

18.8 km

Depth of the event in kilometers.

Place

14km S of Big Lake, Alaska

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

Time

2019-02-18 17:02:45

Time when the event occurred. UTC/GMT

Updated

2019-02-18 17:09:45

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

Timezone offset

-540

Timezone offset from UTC in minutes at the event epicenter.

Felt

The total number of felt reports

CDI

3.1

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

automatic

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

329

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

,ak,at,

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

0.68 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

ak01929bgwg5

Id of event.

Event Code

01929bgwg5

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

Event IDS

,ak01929bgwg5,at00pn4sol,

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

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Light earthquake: M4.6 quake has struck near Big Lake in Alaska

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