Sala Sismica

Earthquake with magnitude of mb 5.0 on date 19-12-2018 and time 20:35:53 (Italy) in region Costa Occidentale Peloponneso (GRECIA)

A magnitude mb 5.0 earthquake occured in region: Costa Occidentale Peloponneso (GRECIA), on

  • 19-12-2018 19:35:53 (UTC)
  • 19-12-2018 20:35:53 (UTC +01:00) Italian time
  • 19-12-2018 21:35:53 (UTC +02:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 36.69, 21.55 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
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 ( 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 Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 200 mb 5.0 2018-12-19
36.69 21.55 20 2018-12-19
Sala Sismica INGV-Roma 64000871
Rev 100 mb 5.0
Mwp 4.8
36.69 21.55 20 2018-12-19
Sala Sismica INGV-Roma 63999691
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2018-12-19 19:35:53 ± 0
Latitude 36.69
Longitude 21.55
Depth (km) 20 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV
Event type earthquake
Origin ID 64000871


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) 3494
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
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) 1.45
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


Field Value
Value 4.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude Mwp
Reference to an origin 63999691
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-12-19 19:51:22


Field Value
Value 5
Uncertainty 0.3
Num. used stations
Type of magnitude mb
Reference to an origin 64000871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-19 21:35:20


Field Value
Value 5
Uncertainty 0.3
Num. used stations 41
Type of magnitude mb
Reference to an origin 63999691
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-12-19 19:51:22
TDMT - Time Domain Moment Tensor

TDMT details

Field Value
Scalar Moment1.47318E+23 dyne-cm
Computed depth22 km
Variance Reduction56.46%
Double Couple49%
Model usedCIA

Moment Tensor Components

Component Value

Nodal Planes

Name Strike Dip Rake

Focal Mechanism

Focal Mechanism

psmeca (GMT documentation)

21.549 36.694 22 328 77 -84 121 14 -116 1.47318 23 22.049 37.194

TDMT references

More info and references

Station Distribution

Station Distribution

TDMT station details

Sta Dist Azi V R zcor
AGRP 189.5 4.6 25.03% 114
ITM 63.4 31.8 75.01% 99
KRND 161.7 61.3 73.19% 111
VLI 124.9 88.4 67.31% 106
ANKY 182.2 119.7 63.67% 114
FSK 214.4 336.3 16.21% 117
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download