Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 3.8 on date 28-10-2021 and time 21:14:49 (Italy) in region Canale di Sicilia meridionale (MARE)

A magnitude ML 3.8 earthquake occured in region: Canale di Sicilia meridionale (MARE), on

  • 28-10-2021 19:14:49 (UTC)
  • 28-10-2021 21:14:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 35.4940, 13.0060 at 22 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 3.8 2021-10-28
19:14:49		 35.4945 13.0062 22 2021-11-01
14:26:00		 Bollettino Sismico Italiano INGV 97112031
Reviewed
Rev100 		ML 3.8 2021-10-28
19:14:48		 35.51 12.9552 10 2021-10-28
19:42:54		 Sala Sismica INGV-Roma 97046341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-28 19:14:49 ± 0.41
Latitude 35.4945 ± 0.0207
Longitude 13.0062 ± 0.0232
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97112031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2151
Semi-minor axis of confidence ellipse (meter) 2071
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 2150.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 269
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.39390
Epicentral distance of station farthest from the epicenter (degree) 3.22227
Number of stations at which the event was observed 38
Number of stations from which data was used for origin computation 38
Magnitudes information

ML:3.8

Field Value
Value 3.8
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 97112031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-01 14:25:15

ML:3.8

Field Value
Value 3.8
Uncertainty 0.2
Num. used stations 29
Type of magnitude ML
Reference to an origin 97046341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-28 19:42:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SCIAC.HHE. 2021-10-28T19:15:47.33 0.3 undecidable manual S 2 224.5086 54 -0.64 47
IV.HVIT.HHZ. 2021-10-28T19:15:45.39 0.3 undecidable manual S 39 214.5186 54 -0.42 53
IV.CROCE.HHE. 2021-10-28T19:15:43.75 0.3 undecidable manual S 42 201.9423 54 0.64 53
IV.IACL.HHZ. 2021-10-28T19:15:40.59 0.3 undecidable manual P 19 357.6753 54 0.61 22
IV.AIO.HHZ. 2021-10-28T19:15:37.54 0.6 undecidable manual P 35 338.7054 54 -0.09 17
IV.MUCR.HHZ. 2021-10-28T19:15:36.83 0.6 undecidable manual P 30 327.8274 54 0.55 16
IV.MSFR.HHZ. 2021-10-28T19:15:35.04 0.6 undecidable manual P 26 314.9514 54 0.36 17
IV.EMSG.HHZ. 2021-10-28T19:15:34.96 0.6 undecidable manual P 33 310.6557 54 0.82 14
IV.EPZF.HHZ. 2021-10-28T19:15:34.88 0.6 undecidable manual P 32 306.4599 54 1.27 11
IV.EMPL.HHZ. 2021-10-28T19:15:33.26 0.6 undecidable manual P 35 298.8786 54 0.58 16
IV.PLLN.EHN. 2021-10-28T19:15:33.28 0.6 undecidable manual P 20 294.9825 54 1.09 13
IV.GIB.HHE. 2021-10-28T19:15:32.71 0.3 undecidable manual P 18 291.2862 54 0.98 22
IV.MPG.HHE. 2021-10-28T19:15:32.67 0.6 undecidable manual P 6 297.5799 54 0.16 18
IV.SOLUN.HHE. 2021-10-28T19:15:31.73 0.3 undecidable manual P 9 291.8856 54 -0.08 29
IV.GALF.HHZ. 2021-10-28T19:15:31.29 0.6 undecidable manual P 29 282.4062 54 0.66 19
IV.ERC.EHZ. 2021-10-28T19:15:31.08 0.3 undecidable manual P 353 284.604 54 0.19 31
IV.CSLB.HHZ. 2021-10-28T19:15:31.91 0.6 undecidable manual P 19 286.7019 54 0.75 17
IV.ESML.HHZ. 2021-10-28T19:15:31.60 0.3 undecidable manual P 35 288.6888 54 0.19 30
MN.WDD.HHE. 2021-10-28T19:15:30.20 0.3 undecidable manual S 74 141.9468 54 0.01 83
IV.HAGA.HHZ. 2021-10-28T19:15:30.14 0.3 undecidable manual P 43 276.2124 54 0.29 33
IV.LEVAN.EHN. 2021-10-28T19:15:30.70 0.3 undecidable manual P 348 283.1055 54 -0.01 33
IV.MTGR.HHZ. 2021-10-28T19:15:29.33 0.6 undecidable manual P 355 267.0327 54 0.62 22
IV.MBFT.HHN. 2021-10-28T19:15:29.38 0.6 undecidable manual P 359 272.0277 54 0.05 24
IV.RESU.HHZ. 2021-10-28T19:15:28.66 0.6 undecidable manual P 21 256.4544 54 1.26 18
IV.HSRS.HNN. 2021-10-28T19:15:28.39 0.3 undecidable manual P 48 265.8339 54 -0.18 38
IV.ALJA.HHZ. 2021-10-28T19:15:28.51 0.6 undecidable manual P 15 258.8409 54 0.82 22
IT.LNT.HGZ. 2021-10-28T19:15:28.78 0.3 undecidable manual P 41 267.1326 54 0.05 38
IV.MARS.HHN. 2021-10-28T19:15:27.64 0.6 undecidable manual P 351 253.6572 54 0.6 25
IV.MCT.HHN. 2021-10-28T19:15:27.73 0.6 undecidable manual P 13 241.6803 54 2.17 11
IV.CMDO.HHE. 2021-10-28T19:15:25.97 0.6 undecidable manual P 18 230.2917 54 1.83 16
IV.MMGO.HHN. 2021-10-28T19:15:24.62 0.3 undecidable manual P 359 240.4815 54 -0.79 39
IV.HVZN.HHZ. 2021-10-28T19:15:24.85 0.3 undecidable manual P 39 241.2807 54 -0.66 41
MN.CLTB.HHE. 2021-10-28T19:15:23.96 0.3 undecidable manual P 5 231.8901 54 -0.38 48
IV.RAFF.HHZ. 2021-10-28T19:15:23.20 0.3 undecidable manual P 32 226.8063 54 -0.5 48
IV.ISPIC.EHZ. 2021-10-28T19:15:22.86 0.3 undecidable manual P 49 221.9112 54 -0.23 53
IV.SCIAC.HHE. 2021-10-28T19:15:22.48 0.3 undecidable manual P 2 224.5086 54 -0.94 41
IV.HMDC.HHZ. 2021-10-28T19:15:22.96 0.6 undecidable manual P 44 227.3058 54 -0.81 28
IV.HVIT.HHZ. 2021-10-28T19:15:21.31 0.6 undecidable manual P 39 214.5186 54 -0.86 30
IV.CLTA.HHE. 2021-10-28T19:15:20.67 0.1 undecidable manual P 25 203.3409 54 -0.12 81
IV.CROCE.HHE. 2021-10-28T19:15:19.96 0.3 undecidable manual P 42 201.9423 54 -0.65 53
MN.WDD.HHE. 2021-10-28T19:15:13.22 0.6 undecidable manual P 74 141.9468 54 0.07 54
IV.LINA.HHE. 2021-10-28T19:15:04.60 0.3 undecidable manual S 343 43.7229 109 0.07 100
IV.LINA.HHE. 2021-10-28T19:14:58.08 0.6 undecidable manual P 343 43.7229 109 -0.26 63
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.WDD.HHE. ML:4.3 0.010061595000000001 0.32 AML other m 2021-10-28T19:15:36.12
MN.WDD.HHN. ML:4.2 0.008605104 0.5504 AML other m 2021-10-28T19:15:41.92
IV.HVIT.HHE. ML:3.6 0.0009921939 0.2944 AML other m 2021-10-28T19:15:49.93
IV.HVIT.HHN. ML:3.8 0.001500671 0.3584 AML other m 2021-10-28T19:15:50.40
IV.RAFF.HHN. ML:3.8 0.001481804 0.7936 AML other m 2021-10-28T19:15:50.70
IV.RAFF.HHE. ML:4.0 0.0021154834999999998 0.8192 AML other m 2021-10-28T19:15:50.36
IV.HMDC.HHE. ML:3.8 0.0014494065 0.384 AML other m 2021-10-28T19:15:53.78
IV.HMDC.HNE. ML:3.8 0.0014595995 0.3968 AML other m 2021-10-28T19:15:53.79
IV.ISPIC.EHE. ML:3.7 0.001325958 0.2432 AML other m 2021-10-28T19:15:55.78
IV.ISPIC.HNE. ML:3.8 0.0014072499999999999 0.2432 AML other m 2021-10-28T19:15:55.78
IV.HMDC.HHN. ML:3.9 0.00176133 0.256 AML other m 2021-10-28T19:15:56.60
IV.HMDC.HNN. ML:3.9 0.001725605 0.2816 AML other m 2021-10-28T19:15:56.61
IV.ISPIC.HNN. ML:3.7 0.0012979703 0.384 AML other m 2021-10-28T19:15:58.95
IV.ISPIC.EHN. ML:3.7 0.0013377455 0.384 AML other m 2021-10-28T19:15:58.95
IV.HVZN.HHE. ML:4.0 0.002253658 0.3968 AML other m 2021-10-28T19:15:58.94
IV.HVZN.HNE. ML:4.0 0.002082941 1.5776 AML other m 2021-10-28T19:15:59.94
IV.HVZN.HNN. ML:4.1 0.002741218 0.6784 AML other m 2021-10-28T19:16:01.27
IV.HVZN.HHN. ML:4.2 0.002896665 0.6912 AML other m 2021-10-28T19:16:01.27
IV.ESML.HNE. ML:3.6 0.0006395 0.64 AML other m 2021-10-28T19:16:04.15
IV.ERC.EHN. ML:3.6 0.0005395908499999999 0.6272 AML other m 2021-10-28T19:16:04.88
IV.ERC.EHE. ML:3.4 0.0003524956 0.6656 AML other m 2021-10-28T19:16:05.77
IV.EMPL.HHE. ML:4.4 0.003512704 0.4352 AML other m 2021-10-28T19:16:06.83
IV.ESML.HHN. ML:3.7 0.0006545000000000001 1.52 AML other m 2021-10-28T19:16:07.95
IV.ESML.HNN. ML:3.6 0.0006185 1.54 AML other m 2021-10-28T19:16:07.19
IV.EMPL.HHN. ML:4.4 0.00325 0.32 AML other m 2021-10-28T19:16:07.99
IV.EPZF.HHE. ML:4.0 0.0011066164999999999 0.6016 AML other m 2021-10-28T19:16:11.66
IV.EPZF.HHN. ML:4.1 0.00148 1.34 AML other m 2021-10-28T19:16:12.18
IV.MUCR.HHE. ML:3.8 0.0006015 0.46 AML other m 2021-10-28T19:16:14.50
IV.MUCR.HHN. ML:3.9 0.0008785 1.48 AML other m 2021-10-28T19:16:15.14
IV.MSFR.HHN. ML:3.4 0.00029549999999999997 1.06 AML other m 2021-10-28T19:16:15.30
IV.EMSG.HHN. ML:4.0 0.00117 0.7 AML other m 2021-10-28T19:16:17.41
IV.AIO.HHE. ML:3.4 0.0002535 0.48 AML other m 2021-10-28T19:16:20.55
IV.ESML.HHE. ML:3.7 0.00065088945 0.4992 AML other m 2021-10-28T19:16:21.93
IV.MSFR.HHE. ML:3.3 0.00021150000000000002 1.06 AML other m 2021-10-28T19:16:22.42
IV.EMSG.HHE. ML:4.0 0.001219786 0.4224 AML other m 2021-10-28T19:16:30.01
IV.AIO.HHN. ML:3.4 0.0002432259 0.4992 AML other m 2021-10-28T19:16:33.29
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download