Light earthquake 4.9 mag, 172 km W of Hihifo, Tonga

A light earthquake magnitude 4.9 (ml/mb) has struck on Sunday, 172 km W of Hihifo, Tonga (107 miles). The 4.9-magnitude earthquake has occurred at 19:51:04 / 7:51 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface. Global date and time of event UTC/GMT: 24/09/18 / 2018-09-24 07:51:04 / September 24, 2018 @ 7:51 am. Exact location, longitude -175.3438° West, latitude -15.7491° South, depth = 10 km. Event ids that are associated to the earthquake: us2000hj9d. Id of event: us2000hj9d.

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

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 172 km W of Hihifo, Tonga. This data comes from the USGS Earthquake Notification Service.

Hihifo Tonga

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Parameter	Value	Description
Magnitude	4.9 mb	The magnitude for the event.
Longitude	-175.3438° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-15.7491° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	172km W 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	2018-09-24 07:51:04	Time when the event occurred. UTC/GMT
Updated	2018-09-24 08:38:00	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	369	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	3.904	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.5 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	62	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	us2000hj9d	Id of event.
Event Code	2000hj9d	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us2000hj9d,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4.9 mag, 172 km W of Hihifo, Tonga

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