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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.6 mag, 43 km E of `Ohonua, Tonga

Posted by admin on October 14, 2017 0 Comments

Earthquake location -21.322S, -174.5266WA light earthquake magnitude 4.6 (ml/mb) strikes 43 kilometers (27 miles) from `Ohonua in Tonga on Friday. Exact location of event, longitude -174.5266 West, latitude -21.322 South, depth = 35 km. Date and time of earthquake in UTC/GMT: 07/10/17 / 2017-10-07 11:23:13 / October 7, 2017 @ 11:23 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was picked up at 23:23:13 / 11:23 pm (local time epicenter). The earthquake occurred at a depth of 35 km (22 miles) below the earth’s surface. Unique identifier: us1000arkp. Ids that are associated to the event: us1000arkp.

Closest city/cities/towns to epicentrum/hypocenter was Nuku‘alofa, ‘Ohonua (min 5000 pop). Event epicenter was 73 km (45 miles) from Nuku‘alofa (c. 22 400 pop), 44 km (27 miles) from ‘Ohonua (c. 1 200 pop). Nearby country/countries, Tonga (c. 123 000 pop) (That might be effected).

There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days eighteen earthquakes of magnitude 3.0 or greater that has struck near.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 43 km E of `Ohonua, Tonga.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -174.5266° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -21.322° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 43km E of `Ohonua, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-07 11:23:13 Time when the event occurred. UTC/GMT
Updated 2017-10-14 08:00:00 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 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 326 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 ,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 4.863 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.32 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 117 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 us1000arkp Id of event.
Event Code 1000arkp An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000arkp, A comma-separated list of event ids that are associated to an event.

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