ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of mb 4.1 on date 18-04-2018 and time 05:18:16 (Italy) in region Crete, Greece [Sea: Greece]

A magnitude mb 4.1 earthquake occured in region: Crete, Greece [Sea: Greece], on

  • 18-04-2018 03:18:16 (UTC)
  • 18-04-2018 05:18:16 (UTC +02:00) Italian time
  • 18-04-2018 06:18:16 (UTC +03:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 34.32, 26.59 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 Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 mb 4.1
Mwp 4.2
2018-04-18
03:18:16
34.32 26.59 20 2018-04-18
04:38:34
Sala Sismica INGV-Roma 55764561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-04-18 03:18:16
Latitude 34.32
Longitude 26.59
Depth (km) 20 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 55764561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3820
Semi-minor axis of confidence ellipse (meter) 200
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 3085.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 176.707
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.29623
Epicentral distance of station closest to the epicenter (degree) 1.31478
Epicentral distance of station farthest from the epicenter (degree) 10.27815
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

Mwp:4.2

Field Value
Value 4.2
Uncertainty 0
Num. used stations 1
Type of magnitude Mwp
Reference to an origin 55764561
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-04-18 04:38:34

mb:4.1

Field Value
Value 4.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude mb
Reference to an origin 55764561
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-04-18 04:38:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.EIL.BHZ. 2018-04-18T03:21:50.75 10.0 negative automatic S 121 8.4764 -1.89438 0
GE.MSBI.BHZ. 2018-04-18T03:21:38.72 10.0 negative automatic S 110 7.957 -1.02444 0
GE.SALP.BHZ. 2018-04-18T03:21:27.77 10.0 positive automatic S 105 7.5408 -1.93593 0
IS.KZIT.BHZ. 2018-04-18T03:21:24.26 10.0 negative automatic S 115 7.4087 -2.1286 0
MN.CUC.BHZ. 2018-04-18T03:20:43.02 10.0 positive automatic P 307 10.2781 0.444195 0.909091
MN.CEL.BHZ. 2018-04-18T03:20:30.67 10.0 positive automatic P 298 9.4686 -0.825642 0.930233
MN.TIP.BHZ. 2018-04-18T03:20:26.22 10.0 positive automatic P 305 9.2454 -2.22685 0.952381
GE.EIL.BHZ. 2018-04-18T03:20:18.50 10.0 positive automatic P 121 8.4764 0.694564 0.888889
GE.MSBI.BHZ. 2018-04-18T03:20:10.37 10.0 positive automatic P 110 7.957 -0.236158 0.952381
HT.FNA.HHZ. 2018-04-18T03:20:09.01 10.0 negative automatic P 329 7.6629 2.27405 0.985222
GE.SALP.BHZ. 2018-04-18T03:20:04.92 10.0 positive automatic P 105 7.5408 -0.093626 0.963855
IS.KZIT.BHZ. 2018-04-18T03:20:02.41 10.0 positive automatic P 115 7.4087 -0.75244 0.930233
HT.LIT.HHZ. 2018-04-18T03:19:54.02 10.0 positive automatic P 332 6.6362 1.42515 0.97561
HT.AGG.HHZ. 2018-04-18T03:19:41.81 10.0 positive automatic P 325 5.8058 0.591896 0.985222
GE.CSS.BHZ. 2018-04-18T03:19:38.50 10.0 positive automatic P 81 5.5842 0.367487 0.952381
KO.ELL.BHZ. 2018-04-18T03:19:11.32 10.0 positive automatic P 47 3.6333 -0.138142 0.769231
GE.APE.BHZ. 2018-04-18T03:18:59.75 10.0 positive automatic P 343 2.8799 -1.25418 0.930233
HL.ARG.HHZ. 2018-04-18T03:18:53.26 10.0 positive automatic P 33 2.2706 0.727041 0.970874
GE.KARP.BHZ. 2018-04-18T03:18:38.15 10.0 positive automatic P 21 1.3148 -1.30913 0.851064
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