Earthquake with magnitude of ML 3.1 on date 27-09-2021 and time 00:14:13 (UTC) in region Malta [Sea]

A magnitude ML 3.1 earthquake occured in region: Malta [Sea], on

  • 27-09-2021 00:14:13 (UTC)
  • 27-09-2021 02:14:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 34.652, 14.294 at 38 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
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
Reviewed
Rev100
ML 3.1 2021-09-27
00:14:13
34.6522 14.2935 38 2021-09-27
00:35:07
Sala Sismica INGV-Roma 95923501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 00:14:13 ± 0.12
Latitude 34.6522 ± 0.0000
Longitude 14.2935 ± 0.0000
Depth (km) 38 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95923501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 0
Semi-minor axis of confidence ellipse (meter) 0
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 45
Circular confidence region, given by single value of horizontal uncertainty (meter) 0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 337
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 3.48307
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 18
Magnitude information

ML:3.1

Field Value
Value 3.1
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 95923501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 00:35:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ICAI.EHZ. 2021-09-27T00:16:17.90 3.0 undecidable manual Sn -9.99 0
IV.HAGA.HHZ. 2021-09-27T00:15:26.28 0.6 undecidable manual S 15 2.7222 90 0.22 18
IV.HLNI.HHZ. 2021-09-27T00:15:26.45 0.6 undecidable manual S 10 2.7348 90 0.05 19
IV.SSY.HHZ. 2021-09-27T00:15:24.09 0.6 undecidable manual S 14 2.5829 90 1.22 14
IV.RAFF.HHZ. 2021-09-27T00:15:23.49 0.6 undecidable manual S 1 2.5694 90 0.91 17
IV.HAVL.HHZ. 2021-09-27T00:15:19.18 0.6 undecidable manual S 16 2.4021 90 0.7 22
IV.ACATE.EHE. 2021-09-27T00:15:17.72 0.6 undecidable manual S 4 2.376 90 -0.01 28
IV.HVIT.HHE. 2021-09-27T00:15:16.60 0.6 undecidable manual S 4 2.3463 90 -0.41 26
IV.MCPD.HHZ. 2021-09-27T00:15:06.84 0.6 undecidable manual P 6 3.4831 90 0.64 15
IV.CSLB.HHZ. 2021-09-27T00:15:03.37 0.1 undecidable manual P 357 3.2888 90 0.09 34
IV.GALF.HHZ. 2021-09-27T00:15:01.43 1.0 undecidable manual P 4 3.0649 90 1.22 6
IV.CPTP.HHZ. 2021-09-27T00:14:56.79 0.3 undecidable manual P 358 2.7555 90 0.89 21
IV.HLNI.HHZ. 2021-09-27T00:14:55.24 0.6 positive manual P 10 2.7348 90 -0.46 17
IV.HAGA.HHZ. 2021-09-27T00:14:55.63 0.3 undecidable manual P 15 2.7222 90 0.13 27
IV.SSY.HHZ. 2021-09-27T00:14:54.02 0.3 undecidable manual P 14 2.5829 90 0.36 31
IV.HVZN.HHE. 2021-09-27T00:14:53.56 0.6 undecidable manual P 8 2.5478 90 0.41 21
IV.HSRS.HHE. 2021-09-27T00:14:53.62 1.0 undecidable manual P 17 2.5523 90 0.47 10
IV.RAFF.HHZ. 2021-09-27T00:14:52.63 1.0 negative manual P 1 2.5694 90 -0.86 9
IV.HAVL.HHZ. 2021-09-27T00:14:51.13 1.0 positive manual P 16 2.4021 90 0.01 13
IV.CLTA.HHE. 2021-09-27T00:14:51.98 0.6 undecidable manual P 354 2.519 90 -0.68 20
IV.ACATE.EHE. 2021-09-27T00:14:50.62 0.6 undecidable manual P 4 2.376 90 -0.07 27
IV.HVIT.HHE. 2021-09-27T00:14:49.37 0.1 undecidable manual P 4 2.3463 90 -0.9 44
IV.HMDC.HHE. 2021-09-27T00:14:49.87 0.1 undecidable manual P 10 2.3391 90 -0.41 53
MN.WDD.HHE. 2021-09-27T00:14:49.59 0.6 undecidable manual S 9 1.1997 90 -0.08 57
IV.ISPIC.EHE. 2021-09-27T00:14:48.16 0.6 undecidable manual P 13 2.1836 90 0.02 33
IV.HPAC.HHE. 2021-09-27T00:14:48.13 0.1 undecidable manual P 16 2.1422 90 0.67 58
MN.WDD.HHE. 2021-09-27T00:14:33.86 0.1 undecidable manual P 9 1.1997 90 -0.63 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHE. ML:3 0.000139 0.86 AML other m 2021-09-27T00:15:23.43
IV.HAVL.HHN. ML:3.1 0.000221 1.72 AML other m 2021-09-27T00:15:26.03
IV.HAGA.HHE. ML:3 0.00012095 0.76 AML other m 2021-09-27T00:15:28.79
IV.HLNI.HHN. ML:3 0.00011235 0.26 AML other m 2021-09-27T00:15:29.32
IV.HAGA.HHN. ML:3 0.0001095 0.42 AML other m 2021-09-27T00:15:30.57
IV.RAFF.HHN. ML:3.1 0.000171 1.42 AML other m 2021-09-27T00:15:33.10
IV.RAFF.HHE. ML:3.2 0.0002065 1.56 AML other m 2021-09-27T00:15:33.89
IV.SSY.HHN. ML:3.8 0.000809 0.64 AML other m 2021-09-27T00:15:34.14
IV.SSY.HHE. ML:3.3 0.0002735 0.78 AML other m 2021-09-27T00:15:34.48
IV.CPTP.HHN. ML:2.9 9.525E-5 0.86 AML other m 2021-09-27T00:15:37.54
IV.HLNI.HHE. ML:2.9 0.0001004 0.42 AML other m 2021-09-27T00:15:38.28
IV.CPTP.HHE. ML:3.1 0.000133 1.42 AML other m 2021-09-27T00:15:39.04
IV.GALF.HHN. ML:3.2 0.0001575 0.68 AML other m 2021-09-27T00:15:45.47
IV.GALF.HHE. ML:3.3 0.0001655 0.52 AML other m 2021-09-27T00:15:46.47
IV.CSLB.HHN. ML:2.7 3.985E-5 0.52 AML other m 2021-09-27T00:15:48.15
IV.CSLB.HHE. ML:2.7 3.455E-5 0.66 AML other m 2021-09-27T00:15:57.87
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download