Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.0 on date 27-09-2021 and time 02:14:13 (Italy) in region Malta [Sea]

A magnitude ML 3.0 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) 34.7390, 14.1720 at 21 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 3.0 2021-09-27
00:14:13		 34.7392 14.1717 21 2022-03-30
13:04:38		 Bollettino Sismico Italiano INGV 101108651
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 ± 0.4
Latitude 34.7392 ± 0.0270
Longitude 14.1717 ± 0.0613
Depth (km) 21 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 101108651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5780
Semi-minor axis of confidence ellipse (meter) 2629
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 105
Circular confidence region, given by single value of horizontal uncertainty (meter) 5780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 323
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 1.13494
Epicentral distance of station farthest from the epicenter (degree) 3.40843
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes 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

ML:3.0

Field Value
Value 3.0
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 101108651
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-18 11:44:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2021-09-27T00:15:26.60 0.6 undecidable manual S 17 2.6656 54 -0.19 22
IV.HLNI.HHZ. 2021-09-27T00:15:25.90 0.6 undecidable manual S 12 2.6683 54 -0.95 17
IV.SSY.HHZ. 2021-09-27T00:15:24.00 0.6 undecidable manual S 17 2.5244 54 0.58 24
IV.RAFF.HHZ. 2021-09-27T00:15:23.40 0.6 undecidable manual S 4 2.4866 54 0.89 22
IV.HAVL.HHZ. 2021-09-27T00:15:19.10 0.6 undecidable manual S 19 2.3490 54 -0.11 32
IV.ACATE.EHE. 2021-09-27T00:15:17.70 0.6 undecidable manual S 7 2.2987 54 -0.31 33
IV.HVIT.HHE. 2021-09-27T00:15:17.00 0.6 undecidable manual S 7 2.2699 54 -0.32 33
IV.MCPD.HHZ. 2021-09-27T00:15:06.84 0.6 undecidable manual P 7 3.4084 54 0.91 15
IV.CSLB.HHZ. 2021-09-27T00:15:03.31 0.3 undecidable manual P 358 3.1980 54 0.29 29
IV.GALF.HHZ. 2021-09-27T00:15:01.43 1.0 undecidable manual P 6 2.9866 54 1.33 7
IV.CMDO.HHZ. 2021-09-27T00:14:57.85 0.3 undecidable manual P 354 2.7375 54 1.19 22
IV.SCIAC.HHN. 2021-09-27T00:14:57.62 0.6 undecidable manual P 343 2.9066 54 -1.38 13
IV.CPTP.HHZ. 2021-09-27T00:14:56.79 0.3 undecidable manual P 360 2.6665 54 1.11 24
IV.HLNI.HHZ. 2021-09-27T00:14:55.18 0.3 undecidable manual P 12 2.6683 54 -0.52 31
IV.HAGA.HHZ. 2021-09-27T00:14:55.38 0.3 undecidable manual P 17 2.6656 54 -0.28 32
IV.SSY.HHZ. 2021-09-27T00:14:54.02 0.3 undecidable manual P 17 2.5244 54 0.3 39
IV.HSRS.HHE. 2021-09-27T00:14:53.62 1.0 undecidable manual P 20 2.5010 54 0.23 13
IV.HVZN.HHE. 2021-09-27T00:14:53.56 0.6 undecidable manual P 10 2.4767 54 0.5 26
IV.RAFF.HHZ. 2021-09-27T00:14:52.61 0.3 undecidable manual P 4 2.4866 54 -0.58 37
IV.CLTA.HHE. 2021-09-27T00:14:51.98 0.6 undecidable manual P 356 2.4237 54 -0.34 29
IV.HAVL.HHZ. 2021-09-27T00:14:51.17 0.3 undecidable manual P 19 2.3490 54 -0.12 49
IV.ACATE.EHE. 2021-09-27T00:14:50.62 0.6 undecidable manual P 7 2.2987 54 0.02 35
MN.WDD.HHE. 2021-09-27T00:14:49.50 0.6 undecidable manual S 15 1.1349 95 0.15 67
IV.HMDC.HHE. 2021-09-27T00:14:49.88 0.6 undecidable manual P 12 2.2735 54 -0.36 33
IV.HVIT.HHE. 2021-09-27T00:14:49.37 0.6 undecidable manual P 7 2.2699 54 -0.83 28
IV.ISPIC.EHE. 2021-09-27T00:14:48.16 0.6 undecidable manual P 16 2.1242 54 -0.03 40
IV.HPAC.HHE. 2021-09-27T00:14:48.14 0.3 undecidable manual P 19 2.0900 54 0.43 57
MN.WDD.HHE. 2021-09-27T00:14:33.87 0.3 undecidable manual P 15 1.1349 95 -0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHE. ML:2.9 0.00013900000000000002 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 0.00012095 0.76 AML other m 2021-09-27T00:15:28.79
IV.HLNI.HHN. ML:2.9 0.00011235000000000001 0.26 AML other m 2021-09-27T00:15:29.32
IV.HAGA.HHN. ML:2.9 0.0001095 0.42 AML other m 2021-09-27T00:15:30.57
IV.RAFF.HHN. ML:3.1 0.00017099999999999998 1.42 AML other m 2021-09-27T00:15:33.10
IV.RAFF.HHE. ML:3.1 0.0002065 1.56 AML other m 2021-09-27T00:15:33.89
IV.SSY.HHN. ML:3.8 0.0008089999999999999 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 0.00009525 0.86 AML other m 2021-09-27T00:15:37.54
IV.HLNI.HHE. ML:2.9 0.00010039999999999999 0.42 AML other m 2021-09-27T00:15:38.28
IV.CPTP.HHE. ML:3.0 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:3.2 0.0001655 0.52 AML other m 2021-09-27T00:15:46.47
IV.CSLB.HHN. ML:2.7 0.00003985 0.52 AML other m 2021-09-27T00:15:48.15
IV.CSLB.HHE. ML:2.6 0.00003455 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