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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.4 mag has occurred near Hihifo in Tonga

Posted by admin on August 25, 2017 0 Comments

Earthquake location -15.0808S, -172.856WA light earthquake with magnitude 4.4 (ml/mb) was detected on Thursday, 135 km NE of Hihifo, Tonga (84 miles). Exact location, longitude -172.856° West, latitude -15.0808° South, depth = 26.27 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.4-magnitude earthquake has occurred at 16:51:12 / 4:51 pm (local time epicenter). The epicenter of the earthquake was roughly 26.27 km (16 miles) below the earth’s surface. Date and time of earthquake in UTC/GMT: 28/07/17 / 2017-07-28 04:51:12 / July 28, 2017 @ 4:51 am. Unique identifier: us2000a3me. Ids that are associated to the event: us2000a3me.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been four, in the last 10 days four, in the past 30 days six and in the last 365 days thirty-one earthquakes of magnitude 3.0 or greater that has occurred nearby. Every year there are an estimated 13,000 light earthquakes in the world.

Questions or comments?

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. 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: 135 km NE of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -172.856° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.0808° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 26.27 km Depth of the event in kilometers.
Place 135km NE of Hihifo, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-07-28 04:51:12 Time when the event occurred. UTC/GMT
Updated 2017-08-24 23:57:18 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 298 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 1.564 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.61 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 118 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 us2000a3me Id of event.
Event Code 2000a3me An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000a3me, A comma-separated list of event ids that are associated to an event.

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