INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Mwp 6.5 on date 08-12-2017 and time 01:22:55 (Italy) in region Western Caroline Islands, Micronesia [Sea: Micronesia]

A magnitude Mwp 6.5 earthquake occured in region: Western Caroline Islands, Micronesia [Sea: Micronesia], on

  • 08-12-2017 00:22:55 (UTC)
  • 08-12-2017 01:22:55 (UTC +01:00) Italian time
  • 08-12-2017 10:22:55 (UTC +10:00) local time in the region of the earthquake (Pacific/Guam)

and geographic coordinates (lat, lon) 10.01, 140.25 at 20 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Date and Time (UTC) Latitude Longitude Magnitude Depth (km) Published time (UTC) Author Location ID
Rev 100 2017-12-08
00:22:55
10.01 140.27 mb 5.6
Mwp 6.4
Mwpd 6.5
20 2017-12-08
00:38:22
Sala Sismica INGV-Roma 52419491
Rev 200 2017-12-08
00:22:55
10.01 140.25 Mwp 6.5 20 2017-12-08
00:52:31
Sala Sismica INGV-Roma 52419731
Best location and best magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-08 00:22:55 ± 0
Latitude 10.01
Longitude 140.25
Depth (km) 20 ± 15 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV
Event type earthquake
Origin ID 52419731

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 13224
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.427
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitudes information

Mwp:6.4

Field Value
Value 6.4
Uncertainty 0.1
Num. used stations 42
Type of magnitude Mwp
Reference to an origin 52419491
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-08 00:38:22

Mwp:6.5

Field Value
Value 6.5
Uncertainty 0.1
Num. used stations
Type of magnitude Mwp
Reference to an origin 52419731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-08 00:52:31

Mwpd:6.5

Field Value
Value 6.5
Uncertainty 0.1
Num. used stations 39
Type of magnitude Mwpd
Reference to an origin 52419491
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-08 00:38:22

mb:5.6

Field Value
Value 5.6
Uncertainty 0.1
Num. used stations 48
Type of magnitude mb
Reference to an origin 52419491
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-08 00:38:22
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download