Earthquake with magnitude of ML 3.0 on date 27-09-2021 and time 02:27:42 (UTC) in region Malta [Sea]

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

  • 27-09-2021 02:27:42 (UTC)
  • 27-09-2021 04:27:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 34.737, 13.866 at 27 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
02:27:42
34.737 13.8663 27 2021-09-27
02:44:19
Sala Sismica INGV-Roma 95925171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 02:27:42 ± 0.65
Latitude 34.7370 ± 0.0441
Longitude 13.8663 ± 0.1204
Depth (km) 27 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95925171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 11280
Semi-minor axis of confidence ellipse (meter) 4090
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 284
Circular confidence region, given by single value of horizontal uncertainty (meter) 11280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 336
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 4.2448
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 12
Magnitude information

ML:3

Field Value
Value 3
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 95925171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 02:44:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMUR.HNZ. 2021-09-27T02:30:11.86 3.0 undecidable manual Pg 20.82 0
CR.STON.BHZ. 2021-09-27T02:30:10.48 3.0 undecidable manual Pg 22.99 0
TV.SF04.EHZ. 2021-09-27T02:30:04.73 3.0 positive manual Pg 17.780001 0
IV.CMPR.HNZ. 2021-09-27T02:30:03.89 3.0 undecidable manual Sg 14.72 0
IV.MTL1.HNZ. 2021-09-27T02:30:02.78 3.0 undecidable manual Pg 14.25 0
IV.MCRV.HHZ. 2021-09-27T02:29:24.97 3.0 undecidable manual Pg 11.82 0
IV.CDRU.HNZ. 2021-09-27T02:29:05.36 3.0 undecidable manual Pn -3.97 0
IV.HAGA.HHZ. 2021-09-27T02:28:57.39 0.6 undecidable manual S 22 2.751 54 0.28 57
IV.HLNI.HHZ. 2021-09-27T02:28:56.28 0.6 undecidable manual S 17 2.733 54 -0.4 56
IV.SSY.HHZ. 2021-09-27T02:28:55.22 0.6 undecidable manual S 22 2.6089 54 1.52 36
IV.RAFF.HHZ. 2021-09-27T02:28:50.95 0.6 undecidable manual S 9 2.5163 54 -0.54 58
IV.HMDC.HHZ. 2021-09-27T02:28:46.79 1.0 undecidable manual S 18 2.3409 54 -0.51 31
IV.PLAC.HHZ. 2021-09-27T02:28:46.39 0.6 undecidable manual P 28 4.2448 54 0.23 26
IV.IVPL.HHZ. 2021-09-27T02:28:39.28 1.0 positive manual P 13 3.7448 54 0.02 19
IV.PLLN.EHZ. 2021-09-27T02:28:33.41 1.0 undecidable manual P 4 3.2609 54 0.83 19
IV.GALF.HHZ. 2021-09-27T02:28:30.82 0.6 undecidable manual P 11 3.0244 54 1.51 30
IV.HAGA.HHZ. 2021-09-27T02:28:24.80 0.1 undecidable manual P 22 2.751 54 -0.73 100
IV.HLNI.HHZ. 2021-09-27T02:28:24.82 0.6 negative manual P 17 2.733 54 -0.46 55
IV.SSY.HHZ. 2021-09-27T02:28:23.44 0.3 positive manual P 22 2.6089 54 -0.12 94
IV.RAFF.HHZ. 2021-09-27T02:28:22.59 0.6 undecidable manual P 9 2.5163 54 0.31 62
IV.HMDC.HHZ. 2021-09-27T02:28:20.78 1.0 undecidable manual P 18 2.3409 54 0.91 27
IV.HAVL.HHZ. 2021-09-27T02:28:20.67 0.6 positive manual P 24 2.4426 54 -0.6 59
IV.ISPIC.EHZ. 2021-09-27T02:28:18.46 1.0 negative manual P 22 2.2078 54 0.43 33
IV.HPAC.HHZ. 2021-09-27T02:28:18.01 0.6 undecidable manual P 25 2.1872 54 0.27 69
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HPAC.HHN. ML:3.1 0.0002425 1.06 AML other m 2021-09-27T02:28:26.41
IV.HMDC.HHN. ML:2.7 8.605E-5 0.84 AML other m 2021-09-27T02:28:28.66
IV.HMDC.HHE. ML:2.6 6.23E-5 0.38 AML other m 2021-09-27T02:28:28.52
IV.HPAC.HHE. ML:3 0.0002205 1.7 AML other m 2021-09-27T02:28:29.00
IV.HAGA.HHE. ML:3 0.00012337866 0.3008 AML other m 2021-09-27T02:28:58.32
IV.HAVL.HHE. ML:3 0.0001395 0.2 AML other m 2021-09-27T02:28:31.77
IV.HAVL.HHN. ML:3.1 0.0002065 0.26 AML other m 2021-09-27T02:28:31.79
IV.HLNI.HHN. ML:2.8 8.017722E-5 0.3008 AML other m 2021-09-27T02:29:02.02
IV.HLNI.HHE. ML:3 0.00010266667 0.2208 AML other m 2021-09-27T02:28:57.73
IV.RAFF.HHE. ML:2.7 7.005E-5 0.76 AML other m 2021-09-27T02:28:36.22
IV.SSY.HHN. ML:3.5 0.0004485 0.92 AML other m 2021-09-27T02:28:37.23
IV.RAFF.HHN. ML:2.8 8.285E-5 0.42 AML other m 2021-09-27T02:28:37.54
IV.SSY.HHE. ML:3.2 0.000212 1.58 AML other m 2021-09-27T02:28:42.19
IV.HAGA.HHN. ML:2.9 0.000101058595 0.5808 AML other m 2021-09-27T02:29:01.51
IV.GALF.HHN. ML:3.2 0.000157 0.54 AML other m 2021-09-27T02:29:03.22
IV.GALF.HHE. ML:3 0.00010085 0.48 AML other m 2021-09-27T02:29:03.39
IV.PLLN.EHE. ML:3.4 0.0001705 0.92 AML other m 2021-09-27T02:29:18.05
IV.PLLN.EHN. ML:3.2 0.0001235 0.62 AML other m 2021-09-27T02:29:20.57
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download