Earthquake with magnitude of ML 2.5 on date 18-10-2021 and time 10:03:36 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 2.5 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 18-10-2021 08:03:36 (UTC)
  • 18-10-2021 10:03:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.4990, 13.5050 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.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km N of Palermo (674435 inhabitants)
47 Km N of Bagheria (55387 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
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.5 2021-10-18
08:03:36
38.4988 13.5047 22 2022-03-30
13:04:12
Bollettino Sismico Italiano INGV 96838101
Reviewed
Rev100
ML 2.6 2021-10-18
08:03:36
38.449 13.4938 1 2021-10-18
08:16:10
Sala Sismica INGV-Roma 96717591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 08:03:36 ± 0.16
Latitude 38.4988 ± 0.0108
Longitude 13.5047 ± 0.0126
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 96838101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1141
Semi-minor axis of confidence ellipse (meter) 612
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 34
Circular confidence region, given by single value of horizontal uncertainty (meter) 1140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.32915
Epicentral distance of station farthest from the epicenter (degree) 4.23671
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 96838101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-16 14:04:20

ML:2.6

Field Value
Value 2.6
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 96717591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 08:16:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.AGLI.HHZ. 2021-10-18T08:04:40.20 0.3 undecidable manual P 310 4.2367 54 -0.62 15
IV.BULT.EHZ. 2021-10-18T08:04:36.51 0.3 undecidable manual P 302 3.9858 54 -0.84 14
MN.VSL.HHZ. 2021-10-18T08:04:26.77 0.3 undecidable manual P 289 3.3563 54 -1.88 8
IV.MARS.HHZ. 2021-10-18T08:04:11.74 0.6 undecidable manual S 225 1.0495 96 1.4 29
IV.HMDC.HHZ. 2021-10-18T08:04:08.08 0.3 undecidable manual P 146 1.8409 54 0.36 45
IV.SSY.HHZ. 2021-10-18T08:04:07.31 0.6 undecidable manual P 137 1.8247 54 -0.19 31
IV.HVIT.HHZ. 2021-10-18T08:04:06.55 0.3 undecidable manual P 152 1.7060 54 0.69 44
IV.HVZN.HHZ. 2021-10-18T08:04:05.41 0.3 undecidable manual P 144 1.6296 54 0.61 47
IV.HLNI.HHZ. 2021-10-18T08:04:04.03 0.3 undecidable manual P 136 1.5756 54 -0.03 57
IV.RAFF.HHZ. 2021-10-18T08:04:03.34 0.3 undecidable manual P 152 1.4443 54 1.1 42
IV.MPNC.HHZ. 2021-10-18T08:04:02.38 0.3 undecidable manual P 103 1.4911 54 -0.51 54
IV.CSLB.HHZ. 2021-10-18T08:04:00.26 0.6 undecidable manual S 142 0.7096 99 -0.1 49
IV.EPZF.HHZ. 2021-10-18T08:04:00.58 0.6 undecidable manual P 122 1.2591 95 0.92 32
IV.MBFT.HHZ. 2021-10-18T08:03:59.92 0.6 undecidable manual S 218 0.7015 99 -0.21 46
IV.GIB.HHZ. 2021-10-18T08:03:59.62 0.6 undecidable manual S 141 0.6529 100 0.93 37
IV.IVUG.HHZ. 2021-10-18T08:03:58.00 0.6 undecidable manual P 95 1.1637 95 -0.05 44
IV.SCIAR.HHZ. 2021-10-18T08:03:57.37 0.6 undecidable manual S 161 0.5900 101 0.5 45
IV.MUCR.HHZ. 2021-10-18T08:03:57.52 0.3 undecidable manual P 113 1.1673 95 -0.58 59
IV.IVPL.HNE. 2021-10-18T08:03:57.17 0.6 undecidable manual P 96 1.1610 95 -0.84 36
IV.MARS.HHZ. 2021-10-18T08:03:56.89 0.3 undecidable manual P 225 1.0495 96 0.79 56
IV.MCPD.HHZ. 2021-10-18T08:03:55.38 0.3 undecidable manual P 111 1.0333 96 -0.45 63
IV.MSFR.HHZ. 2021-10-18T08:03:54.56 0.3 undecidable manual P 118 0.9713 96 -0.21 67
IV.ALJA.HHZ. 2021-10-18T08:03:52.14 0.1 negative manual P 165 0.7743 98 0.71 80
IV.ERC.EHE. 2021-10-18T08:03:52.24 0.3 undecidable manual P 238 0.8544 97 -0.55 62
IV.MTGR.HHE. 2021-10-18T08:03:52.61 0.3 undecidable manual P 224 0.8418 98 0.04 71
IV.IFIL.HHZ. 2021-10-18T08:03:52.53 0.3 undecidable manual P 85 0.8400 98 0 71
IV.MBFT.HHZ. 2021-10-18T08:03:50.22 0.3 undecidable manual P 218 0.7015 99 0.02 73
IV.CSLB.HHZ. 2021-10-18T08:03:50.20 0.1 negative manual P 142 0.7096 99 -0.13 96
IV.USI.HHZ. 2021-10-18T08:03:50.06 0.6 undecidable manual S 310 0.3292 113 0.61 47
IV.SOLUN.HHZ. 2021-10-18T08:03:50.87 0.6 undecidable manual S 177 0.4074 108 -0.76 42
IV.GIB.HHZ. 2021-10-18T08:03:49.49 0.1 negative manual P 141 0.6529 100 0.12 97
IV.SCIAR.HHZ. 2021-10-18T08:03:48.97 0.3 undecidable manual P 161 0.5900 101 0.65 64
IV.MPG.HHZ. 2021-10-18T08:03:47.98 0.6 undecidable manual S 199 0.3552 111 -2.2 16
IV.USI.HHZ. 2021-10-18T08:03:44.36 0.1 undecidable manual P 310 0.3292 113 0.32 100
IV.SOLUN.HHZ. 2021-10-18T08:03:44.41 0.1 undecidable manual P 177 0.4074 108 -0.88 80
IV.MPG.HHZ. 2021-10-18T08:03:43.27 0.1 negative manual P 199 0.3552 111 -1.19 69
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MPG.HHN. ML:2.7 0.0017417555 0.224 AML other m 2021-10-18T08:03:48.81
IV.MPG.HHE. ML:2.6 0.0011824895 0.16 AML other m 2021-10-18T08:03:48.76
IV.USI.HHE. ML:2.8 0.0019735685 0.416 AML other m 2021-10-18T08:03:51.37
IV.SOLUN.HHN. ML:2.6 0.0010714675 0.3008 AML other m 2021-10-18T08:03:51.46
IV.SOLUN.HHE. ML:2.7 0.00126682 0.48 AML other m 2021-10-18T08:03:51.18
IV.USI.HHN. ML:3.4 0.0077011745000000005 0.6976 AML other m 2021-10-18T08:03:51.60
IV.SCIAR.HHN. ML:2.2 0.00027812845 0.224 AML other m 2021-10-18T08:03:57.88
IV.SCIAR.HHE. ML:2.4 0.0004323142 0.2048 AML other m 2021-10-18T08:03:58.01
IV.SCIAR.HNE. ML:2.6 0.0007421847 1.3504 AML other m 2021-10-18T08:03:58.70
IV.SCIAR.HNN. ML:2.6 0.0006670048500000001 0.608 AML other m 2021-10-18T08:03:58.52
IV.CSLB.HHN. ML:2.0 0.00012475927 0.3584 AML other m 2021-10-18T08:04:00.63
IV.MBFT.HHE. ML:2.3 0.00025748214999999996 0.2624 AML other m 2021-10-18T08:04:01.05
IV.MBFT.HHN. ML:2.1 0.00016283115 0.3776 AML other m 2021-10-18T08:04:01.20
IV.MCPD.HHE. ML:2.1 0.00009455659499999999 0.4352 AML other m 2021-10-18T08:04:09.86
IV.MCPD.HHN. ML:2.1 0.00010124738999999999 0.3008 AML other m 2021-10-18T08:04:10.35
IV.MARS.HHN. ML:2.1 0.00010063937000000001 0.736 AML other m 2021-10-18T08:04:12.46
IV.MARS.HNN. ML:2.1 0.000100387235 0.7552 AML other m 2021-10-18T08:04:12.48
IV.MARS.HHE. ML:2.3 0.00015388019 0.9344 AML other m 2021-10-18T08:04:13.03
IV.MUCR.HHE. ML:2.1 0.00008603319000000001 0.2432 AML other m 2021-10-18T08:04:14.72
IV.MUCR.HHN. ML:2.3 0.0001199839 0.3392 AML other m 2021-10-18T08:04:15.01
IV.EPZF.HHE. ML:2.7 0.0002959433 0.48 AML other m 2021-10-18T08:04:22.04
IV.EPZF.HHN. ML:2.6 0.00024538325 0.4032 AML other m 2021-10-18T08:04:22.73
IV.RAFF.HHE. ML:2.8 0.00030649999999999997 0.98 AML other m 2021-10-18T08:04:25.67
IV.HLNI.HHE. ML:2.3 0.00006853955500000001 1.1776 AML other m 2021-10-18T08:04:26.14
IV.HLNI.HHN. ML:2.3 0.000068915275 0.4416 AML other m 2021-10-18T08:04:25.99
IV.RAFF.HHN. ML:2.8 0.00028649999999999997 0.68 AML other m 2021-10-18T08:04:25.44
IV.HVIT.HHN. ML:2.9 0.00024420700000000003 1.2416 AML other m 2021-10-18T08:04:29.62
IV.HVIT.HHE. ML:3.0 0.0002915 0.42 AML other m 2021-10-18T08:04:29.80
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, http://terremoti.ingv.it/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