Earthquake with magnitude of ML 3.0 on date 27-09-2021 and time 00:00:17 (UTC) in region Malta [Sea]

A magnitude ML 3.0 earthquake occured in region: Malta [Sea], on

  • 27-09-2021 00:00:17 (UTC)
  • 27-09-2021 02:00:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 34.79, 13.946 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
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 3.0 2021-09-27
00:00:17
34.7897 13.9462 20 2021-09-27
00:15:59
Sala Sismica INGV-Roma 95923001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 00:00:17 ± 0.23
Latitude 34.7897 ± 0.0153
Longitude 13.9462 ± 0.0263
Depth (km) 20 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95923001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2819
Semi-minor axis of confidence ellipse (meter) 621
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 124
Circular confidence region, given by single value of horizontal uncertainty (meter) 2820
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 322
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 2.80948
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 13
Magnitude information

ML:3

Field Value
Value 3
Uncertainty 0.2
Num. used stations 35
Type of magnitude ML
Reference to an origin 95923001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 00:15:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2021-09-27T00:02:33.72 3.0 undecidable manual Sn -3.98 0
IV.SMA1.EHZ. 2021-09-27T00:02:05.62 3.0 positive manual Pn -7.56 0
IX.COL3.HHZ.02 2021-09-27T00:01:47.92 3.0 negative manual Pn 1.74 0
IV.HAGA.HHZ. 2021-09-27T00:01:31.52 0.6 undecidable manual S 21 2.6782 54 -0.22 16
IV.HLNI.HHZ. 2021-09-27T00:01:30.95 0.6 undecidable manual S 16 2.6647 54 -0.45 15
IV.SSY.HHZ. 2021-09-27T00:01:27.86 0.6 undecidable manual S 21 2.5361 54 -0.48 18
IV.RAFF.HHZ. 2021-09-27T00:01:26.41 0.6 undecidable manual S 8 2.4542 54 0.03 22
IV.HAVL.HHZ. 2021-09-27T00:01:25.03 0.6 undecidable manual S 23 2.3679 54 0.71 20
IV.CLTA.HHZ. 2021-09-27T00:01:24.30 0.6 undecidable manual S 0 2.367 54 0.01 24
IV.HVIT.HHZ. 2021-09-27T00:01:21.37 0.6 undecidable manual S 12 2.2501 54 -0.13 26
IV.HPAC.HHZ. 2021-09-27T00:01:18.47 0.6 undecidable manual S 24 2.1116 54 0.28 28
IV.ISPIC.EHZ. 2021-09-27T00:01:18.81 0.6 undecidable manual S 21 2.135 54 0.06 29
IV.MCPD.HHZ. 2021-09-27T00:01:11.37 3.0 positive manual Pg 0.89 0
IV.PLLN.EHZ. 2021-09-27T00:01:09.78 3.0 negative manual Pg 0.71 0
IV.EPZF.HHZ. 2021-09-27T00:01:08.20 3.0 negative manual Pg 1.57 0
IV.GIB.HHZ. 2021-09-27T00:01:08.74 3.0 negative manual Pn -0.58 0
IV.ESCV.HHZ. 2021-09-27T00:01:07.28 3.0 negative manual Pg 1.77 0
IV.SCIAR.HHZ. 2021-09-27T00:01:05.80 3.0 positive manual Pn -3.82 0
IV.SCIAC.HHZ. 2021-09-27T00:01:02.06 0.6 undecidable manual P 346 2.8095 54 -0.11 15
IV.HCRL.HHZ. 2021-09-27T00:01:00.14 0.3 positive manual P 19 2.6422 54 0.28 24
IV.HLNI.HHZ. 2021-09-27T00:00:59.68 0.3 positive manual P 16 2.6647 54 -0.49 23
IV.CPTP.HHZ. 2021-09-27T00:00:59.89 0.6 undecidable manual P 4 2.6224 54 0.3 17
IV.HAGA.HHZ. 2021-09-27T00:00:59.99 0.6 undecidable manual P 21 2.6782 54 -0.37 15
IV.SSY.HHZ. 2021-09-27T00:00:58.39 0.6 positive manual P 21 2.5361 54 -0.01 20
IV.RAFF.HHZ. 2021-09-27T00:00:57.23 0.6 positive manual P 8 2.4542 54 -0.04 22
IV.CLTA.HHZ. 2021-09-27T00:00:56.47 0.6 positive manual P 0 2.367 54 0.41 22
IV.HAVL.HHZ. 2021-09-27T00:00:55.58 0.6 positive manual P 23 2.3679 54 -0.5 21
IV.HVIT.HHZ. 2021-09-27T00:00:54.56 0.6 undecidable manual P 12 2.2501 54 0.11 26
MN.WDD.HHZ. 2021-09-27T00:00:54.03 0.6 undecidable manual S 24 1.1484 94 -0.03 50
IV.HPAC.HHZ. 2021-09-27T00:00:52.65 0.6 negative manual P 24 2.1116 54 0.11 29
IV.ISPIC.EHZ. 2021-09-27T00:00:52.88 0.6 undecidable manual P 21 2.135 54 0.01 29
MN.WDD.HHZ. 2021-09-27T00:00:38.63 0.1 undecidable manual P 24 1.1484 94 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HPAC.HHN. ML:3.3 0.0004401236 0.36 AML other m 2021-09-27T00:01:29.98
IV.ISPIC.EHE. ML:2.8 0.0001381024 0.44 AML other m 2021-09-27T00:01:27.75
IV.HPAC.HHE. ML:3.3 0.0003857587 0.68 AML other m 2021-09-27T00:01:28.55
IV.ISPIC.EHN. ML:2.9 0.00014872469 0.34 AML other m 2021-09-27T00:01:30.45
IV.HVIT.HHE. ML:3 0.0001938947 0.42 AML other m 2021-09-27T00:01:30.25
IV.HVIT.HHN. ML:3.1 0.0002325846 0.6 AML other m 2021-09-27T00:01:34.87
IV.HAVL.HHE. ML:2.9 0.0001443372 0.32 AML other m 2021-09-27T00:01:39.83
IV.HAVL.HHN. ML:3.2 0.0002473104 0.34 AML other m 2021-09-27T00:01:39.84
IV.CLTA.HHE. ML:2.8 9.691736E-5 1.18 AML other m 2021-09-27T00:01:40.98
IV.HAGA.HHN. ML:3.1 0.0001453478 0.68 AML other m 2021-09-27T00:01:50.09
IV.RAFF.HHN. ML:3 0.00016640865 0.56 AML other m 2021-09-27T00:01:42.35
IV.SSY.HHN. ML:3.7 0.00075456665 0.22 AML other m 2021-09-27T00:01:45.82
IV.HCRL.HHE. ML:2.9 0.0001025 0.16 AML other m 2021-09-27T00:01:34.18
IV.ESCV.HHN. ML:3.2 0.00012925995 0.54 AML other m 2021-09-27T00:01:55.22
IV.RAFF.HHE. ML:3.1 0.00020560585 0.52 AML other m 2021-09-27T00:01:38.26
IV.SSY.HHE. ML:3.6 0.0005749297 0.48 AML other m 2021-09-27T00:01:42.47
IV.CLTA.HHN. ML:2.7 7.750572E-5 0.88 AML other m 2021-09-27T00:01:41.81
IV.HLNI.HHN. ML:3 0.00012779675 0.6 AML other m 2021-09-27T00:01:47.35
IV.HCRL.HHN. ML:2.7 7.07108E-5 0.24 AML other m 2021-09-27T00:01:37.40
IV.HLNI.HHE. ML:3 0.0001292992 0.34 AML other m 2021-09-27T00:01:47.93
IV.HAGA.HHE. ML:3.1 0.00016592855 0.56 AML other m 2021-09-27T00:01:49.49
IV.ESCV.HHE. ML:2.9 8.091091E-5 0.88 AML other m 2021-09-27T00:01:46.99
IV.GIB.HHE. ML:3.2 0.00013769975 0.78 AML other m 2021-09-27T00:01:49.10
IV.PLLN.EHN. ML:3 8.719594E-5 0.64 AML other m 2021-09-27T00:01:57.10
IV.SCIAR.HHN. ML:2.7 3.9622565E-5 0.52 AML other m 2021-09-27T00:01:51.87
IV.PLLN.EHE. ML:3.2 0.0001278476 0.94 AML other m 2021-09-27T00:01:52.18
IV.SCIAR.HHE. ML:2.6 2.8616515E-5 0.22 AML other m 2021-09-27T00:01:13.41
IV.GIB.HHN. ML:3.1 0.0001022 0.46 AML other m 2021-09-27T00:01:57.51
MN.CLTB.HHN. ML:3.5 0.000318 0.66 AML other m 2021-09-27T00:02:01.54
IV.ISPIC.HNE. ML:3.2 0.00032566545 1.09 AML other m 2021-09-27T00:01:06.80
IV.ISPIC.HNN. ML:2.9 0.000158444375 0.29 AML other m 2021-09-27T00:01:30.45
IV.CPTP.HHE. ML:2.8 7.5371575E-5 2.34 AML other m 2021-09-27T00:01:02.12
IV.CPTP.HHN. ML:2.7 6.201723E-5 0.5 AML other m 2021-09-27T00:01:26.22
IV.SCIAR.HNE. ML:3.3 0.00016130105 1.2 AML other m 2021-09-27T00:01:30.75
IV.SCIAR.HNN. ML:3.2 0.000143108395 0.54 AML other m 2021-09-27T00:01:12.14
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