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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.7 quake has struck near `Ohonua in Tonga

Posted by admin on July 19, 2019 0 Comments

Earthquake location -23.4995S, -174.5709WA light earthquake magnitude 4.7 (ml/mb) has occurred on Saturday, 243 km S of `Ohonua, Tonga (151 miles). Event ids that are associated to the earthquake: us70004mb8. Id of event: us70004mb8. Global date and time of event UTC/GMT: 07/07/19 / 2019-07-07 02:54:46 / July 7, 2019 @ 2:54 am. Exact location of event, longitude -174.5709 West, latitude -23.4995 South, depth = 35 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 35 km (22 miles) below the earth’s surface. The 4.7-magnitude earthquake has occurred at 14:54:46 / 2:54 pm (local time epicenter).

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 four, in the past 30 days five and in the last 365 days twenty-eight earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light earthquakes in the world each year.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city 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: 243 km S of `Ohonua, Tonga.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -174.5709° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -23.4995° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 243km S 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 2019-07-07 02:54:46 Time when the event occurred. UTC/GMT
Updated 2019-07-19 00:48:08 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 340 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 6.173 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.38 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 121 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 us70004mb8 Id of event.
Event Code 70004mb8 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us70004mb8, A comma-separated list of event ids that are associated to an event.

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