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Minor World Earthquakes Magnitude -3.9

Minor earthquake, 3.5 mag strikes near Chirik



Earthquake location 55.6778S, -151.9405WA minor earthquake magnitude 3.5 (ml/mb) has struck on Sunday, 231 km E of Chirikof Island, Alaska (144 miles). Exact location, longitude -151.9405° West, latitude 55.6778° North, depth = 10.45 km. All ids that are associated to the event: ak18450197, us2000d49n. Unique identifier: us2000d49n. The 3.5-magnitude earthquake has occurred at 07:59:45 / 7:59 am (local time epicenter). Exact time and date of event in UTC/GMT: 18/02/18 / 2018-02-18 17:59:45 / February 18, 2018 @ 5:59 pm. The epicenter of the earthquake was roughly 10.45 km (6 miles) below the earth’s surface.

In the past 24 hours, there have been five, in the last 10 days seventeen, in the past 30 days one hundred and seven and in the last 365 days one hundred and sixteen earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 130,000 minor quakes in the world each year. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

How would you describe the shaking?

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 231 km E of Chirikof Island, Alaska.

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More information

Parameter Value Description
Magnitude 3.5 mb The magnitude for the event.
Longitude -151.9405° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 55.6778° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10.45 km Depth of the event in kilometers.
Place 231km E of Chirikof Island, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-02-18 17:59:45 Time when the event occurred. UTC/GMT
Updated 2018-03-19 13:43:38 Time when the event was most recently updated. UTC/GMT
Timezone offset -600 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 reviewed Indicates whether the event has been reviewed by a human.
Tsunami 0 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 188 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 ,ak,us, 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 1.536 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.04 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 194 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 us2000d49n Id of event.
Event Code 2000d49n An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak18450197,us2000d49n, A comma-separated list of event ids that are associated to an event.

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