Earthquake with magnitude of ML 2.3 on date 31-10-2021 and time 09:32:29 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 2.3 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 31-10-2021 08:32:29 (UTC)
  • 31-10-2021 09:32:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.413, 15.269 at 136 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

An earthquake occurred to
35 Km NW of Messina (238439 inhabitants)
47 Km NW of Reggio di Calabria (183035 inhabitants)
89 Km N of Acireale (52622 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, 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 ( 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.
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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
ML 2.3 2021-10-31
38.4128 15.269 136 2021-10-31
Sala Sismica INGV-Roma 97106111
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-10-31 08:32:29 ± 0.22
Latitude 38.4128 ± 0.0135
Longitude 15.2690 ± 0.0184
Depth (km) 136 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97106111


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1800
Semi-minor axis of confidence ellipse (meter) 835
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 135
Circular confidence region, given by single value of horizontal uncertainty (meter) 1800
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.39035
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 20
Magnitude information


Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 97106111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-31 08:50:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2021-10-31T08:34:26.43 3.0 undecidable manual Sn -4.54 0
IV.BRSN.EHZ. 2021-10-31T08:34:16.80 3.0 positive manual Pg 16.84 0
HL.VLS.HHZ. 2021-10-31T08:34:15.13 3.0 undecidable manual Sn -5.68 0
IV.OSSC.HHZ. 2021-10-31T08:34:13.52 3.0 negative manual Pg 18.83 0
IV.FIR.HHZ. 2021-10-31T08:34:02.42 3.0 undecidable manual Pn 4.9 0
IV.LRP.EHZ. 2021-10-31T08:34:02.99 3.0 undecidable manual Sn -0.66 0
GU.POPM.HHZ. 2021-10-31T08:34:02.50 3.0 undecidable manual Pn -0.71 0
MN.KLV.HHZ. 2021-10-31T08:33:54.76 3.0 negative manual Pn 6.7 0
IV.COR1.EHZ. 2021-10-31T08:33:51.67 3.0 undecidable manual Pn 3.17 0
IV.ISPIC.EHZ. 2021-10-31T08:33:39.09 3.0 undecidable manual Sg 14.6 0
IV.CROCE.HHZ. 2021-10-31T08:33:34.26 3.0 undecidable manual Sg 9.24 0
IV.VBKN.HHZ. 2021-10-31T08:33:34.09 3.0 undecidable manual Sn -7.27 0
MN.KEK.HHZ. 2021-10-31T08:33:25.28 3.0 negative manual Pn -0.27 0
IV.LRP.EHZ. 2021-10-31T08:33:22.74 3.0 undecidable manual Pn 0.93 0
MN.TIP.HHZ. 2021-10-31T08:33:18.15 0.6 undecidable manual S 56 1.3904 128 0.62 34
IV.CELI.HHZ. 2021-10-31T08:33:17.97 0.6 undecidable manual S 44 1.3814 128 0.61 34
IV.SERS.HHZ. 2021-10-31T08:33:15.39 0.6 undecidable manual S 60 1.2698 131 0.09 41
IV.CET2.HHZ. 2021-10-31T08:33:14.49 0.6 undecidable manual S 25 1.2357 131 -0.2 41
IV.SPS2.HHZ. 2021-10-31T08:33:13.34 1.0 undecidable manual S 43 1.2096 132 -0.88 17
IV.CAR1.HHZ. 2021-10-31T08:33:11.85 0.6 undecidable manual S 41 1.1152 135 -0.73 37
IV.PLAC.HHZ. 2021-10-31T08:33:09.32 1.0 undecidable manual S 87 0.9164 140 -0.04 23
IV.CSFT.HHZ. 2021-10-31T08:33:08.37 3.0 negative manual Pn -1.76 0
IV.SCHR.EHZ. 2021-10-31T08:33:07.69 3.0 positive manual Pg 5.76 0
IV.FERC.HHZ.00 2021-10-31T08:33:06.44 0.6 undecidable manual S 86 0.6736 149 0.43 44
IV.AIO.HHZ. 2021-10-31T08:33:04.51 3.0 undecidable manual S 184 0.4425 159 0.95 0
MN.CEL.HHZ. 2021-10-31T08:33:04.48 0.3 undecidable manual S 107 0.5126 156 0.26 71
IV.MTTG.HHZ. 2021-10-31T08:33:04.76 0.3 undecidable manual S 140 0.5315 155 0.36 70
IV.MUCR.HHZ. 2021-10-31T08:33:04.42 0.3 undecidable manual S 220 0.4829 157 0.5 69
IV.JOPP.HHZ. 2021-10-31T08:33:03.85 0.6 undecidable manual S 68 0.5198 155 -0.44 46
IV.MPNC.HHZ. 2021-10-31T08:33:02.02 0.3 undecidable manual S 166 0.2743 166 -0.33 73
IV.MILZ.HHZ. 2021-10-31T08:33:00.86 1.0 undecidable manual S 192 0.1448 173 -0.93 20
MN.TIP.HHZ. 2021-10-31T08:32:57.40 0.1 undecidable manual P 56 1.3904 128 0.2 77
IV.CELI.HHZ. 2021-10-31T08:32:57.53 0.1 undecidable manual P 44 1.3814 128 0.43 74
IV.SERS.HHZ. 2021-10-31T08:32:56.20 0.1 undecidable manual P 60 1.2698 131 0.29 79
IV.LADO.EHZ. 2021-10-31T08:32:56.33 3.0 undecidable manual Pn -2.34 0
IV.SPS2.HHZ. 2021-10-31T08:32:55.26 0.1 undecidable manual P 43 1.2096 132 -0.03 86
IV.CET2.HHZ. 2021-10-31T08:32:55.87 0.1 undecidable manual P 25 1.2357 131 0.31 79
IV.HLNI.HHZ. 2021-10-31T08:32:54.14 0.1 undecidable manual P 197 1.1089 135 -0.14 85
IV.HAGA.HHZ. 2021-10-31T08:32:54.00 0.1 undecidable manual P 185 1.1304 134 -0.49 78
IV.CAR1.HHZ. 2021-10-31T08:32:53.94 0.1 undecidable manual P 41 1.1152 135 -0.4 81
IV.GIB.HHZ. 2021-10-31T08:32:53.94 0.1 undecidable manual P 247 1.0639 136 0.1 87
IV.PLAC.HHZ. 2021-10-31T08:32:52.54 0.1 undecidable manual P 87 0.9164 140 0.06 90
IV.EPIT.HHZ. 2021-10-31T08:32:51.10 0.1 undecidable manual P 196 0.6241 151 0.9 76
IV.FERC.HHZ.00 2021-10-31T08:32:50.25 0.1 undecidable manual P 86 0.6736 149 -0.29 91
IV.SOI.EHZ. 2021-10-31T08:32:50.57 0.1 undecidable manual P 119 0.7033 148 -0.19 92
IV.JOPP.HHZ. 2021-10-31T08:32:49.18 0.1 undecidable manual P 68 0.5198 155 -0.37 93
IV.MUCR.HHZ. 2021-10-31T08:32:49.35 0.1 undecidable manual P 220 0.4829 157 0.01 100
IV.AIO.HHZ. 2021-10-31T08:32:49.64 0.1 undecidable manual P 184 0.4425 159 0.51 91
MN.CEL.HHZ. 2021-10-31T08:32:49.11 0.1 undecidable manual P 107 0.5126 156 -0.4 92
IV.MTTG.HHZ. 2021-10-31T08:32:49.79 0.1 undecidable manual P 140 0.5315 155 0.17 96
IV.GIZZ.HHZ. 2021-10-31T08:32:48.99 3.0 positive manual P -3.19 0
IV.MILZ.HHZ. 2021-10-31T08:32:47.82 0.3 undecidable manual P 192 0.1448 173 -0.29 76
IV.MPNC.HHZ. 2021-10-31T08:32:47.94 0.1 undecidable manual P 166 0.2743 166 -0.5 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.CEL.HHN. ML:0 4.6498645E-5 1.3184 AML other m 2021-10-31T08:33:05.63
MN.CEL.HHE. ML:0 3.5964685E-5 0.6784 AML other m 2021-10-31T08:33:05.02
IV.GIB.HHN. ML:2.2 5.8732995E-5 1.056 AML other m 2021-10-31T08:32:56.38
IV.MILZ.HHN. ML:2.8 0.0004065 0.38 AML other m 2021-10-31T08:33:01.22
IV.MILZ.HHE. ML:3.3 0.001104291 0.2944 AML other m 2021-10-31T08:33:01.48
IV.MPNC.HHE. ML:2.5 0.0001677738 0.5568 AML other m 2021-10-31T08:33:03.57
IV.JOPP.HHE. ML:2.3 0.00011555 0.38 AML other m 2021-10-31T08:33:04.47
IV.JOPP.HHN. ML:2.2 8.021071E-5 0.64 AML other m 2021-10-31T08:33:04.31
IV.MPNC.HHN. ML:2.6 0.0002075 0.32 AML other m 2021-10-31T08:33:05.21
IV.MUCR.HHN. ML:2.1 6.7580925E-5 2.08 AML other m 2021-10-31T08:33:04.53
IV.PLAC.HHE. ML:2.4 0.0001137145 0.3008 AML other m 2021-10-31T08:33:10.23
IV.MUCR.HHE. ML:1.8 3.5363085E-5 1.6448 AML other m 2021-10-31T08:33:05.79
IV.CSFT.HHN. ML:4.2 0.001609395 0.0576 AML other m 2021-10-31T08:33:10.45
IV.CSFT.HHE. ML:4.2 0.001735329 0.0832 AML other m 2021-10-31T08:33:11.43
IV.PLAC.HHN. ML:2.4 0.0001099 0.36 AML other m 2021-10-31T08:33:11.64
IV.CAR1.HHE. ML:2.4 8.9105595E-5 0.6976 AML other m 2021-10-31T08:33:12.67
IV.CAR1.HHN. ML:2.2 5.882463E-5 1.44 AML other m 2021-10-31T08:33:18.05
IV.SPS2.HHE. ML:1.8 1.915E-5 0.44 AML other m 2021-10-31T08:33:14.42
IV.CET2.HHE. ML:2.4 9.18E-5 0.64 AML other m 2021-10-31T08:33:15.05
IV.SPS2.HHN. ML:1.9 2.53E-5 0.28 AML other m 2021-10-31T08:33:15.54
IV.CET2.HHN. ML:2.6 0.00014011135 0.5248 AML other m 2021-10-31T08:33:15.52
MN.TIP.HHN. ML:2.2 4.095E-5 0.58 AML other m 2021-10-31T08:33:18.87
MN.TIP.HHE. ML:2.1 3.257475E-5 1.0816 AML other m 2021-10-31T08:33:19.51
IV.GIB.HHE. ML:2.3 7.385E-5 1.16 AML other m 2021-10-31T08:33:36.73
MN.CEL.HNE. ML:0 7.1732755E-5 4 AML other m 2021-10-31T08:33:04.13
MN.CEL.HNN. ML:0 6.427998E-5 2.1184 AML other m 2021-10-31T08:33:05.88
IV.JOPP.HNE. ML:2.3 0.000112887145 0.3776 AML other m 2021-10-31T08:33:04.47
IV.JOPP.HNN. ML:2.3 9.569505E-5 0.7168 AML other m 2021-10-31T08:33:04.64
IV.MTTG.HHE. ML:2.2 8.085437E-5 1.3632 AML other m 2021-10-31T08:33:04.11
IV.MTTG.HHN. ML:2.3 9.358793E-5 1.6192 AML other m 2021-10-31T08:33:01.49
IV.FERC.HHE.00 ML:4 0.0044638655 5.6768 AML other m 2021-10-31T08:33:07.62
IV.FERC.HHN.00 ML:3.9 0.003605691 7.5968 AML other m 2021-10-31T08:33:10.04
IV.PLAC.HNE. ML:2.5 0.0001246576 0.7104 AML other m 2021-10-31T08:33:10.23
IV.PLAC.HNN. ML:2.4 0.00010417065 0.3008 AML other m 2021-10-31T08:33:11.81
IV.CAR1.HNE. ML:2.3 6.816045E-5 0.3584 AML other m 2021-10-31T08:33:16.49
IV.CAR1.HNN. ML:2.4 9.7411045E-5 0.736 AML other m 2021-10-31T08:33:13.63
IV.HAGA.HHE. ML:2.6 0.00012520695 1.2992 AML other m 2021-10-31T08:33:34.88
IV.HAGA.HHN. ML:2.5 0.00012060705 1.9584 AML other m 2021-10-31T08:33:08.16
IV.HLNI.HHE. ML:2.3 7.525668E-5 2.24 AML other m 2021-10-31T08:33:13.68
IV.HLNI.HHN. ML:2.3 7.1938665E-5 1.9008 AML other m 2021-10-31T08:33:35.02
IV.SERS.HHE. ML:2.2 4.357215E-5 0.8448 AML other m 2021-10-31T08:33:24.01
IV.SERS.HHN. ML:2 3.2827535E-5 0.6592 AML other m 2021-10-31T08:33:15.77
IV.SERS.HNE. ML:2.4 7.346755E-5 3.104 AML other m 2021-10-31T08:33:16.28
IV.SERS.HNN. ML:2.2 4.8847E-5 0.64 AML other m 2021-10-31T08:33:17.86
IV.LADO.EHE. ML:2.5 7.422758E-5 3.1744 AML other m 2021-10-31T08:33:47.15
IV.LADO.EHN. ML:2.4 6.1552545E-5 2.4256 AML other m 2021-10-31T08:33:38.04
MN.TIP.HNE. ML:2.5 8.828001E-5 1.44 AML other m 2021-10-31T08:33:34.67
MN.TIP.HNN. ML:2.5 8.255495E-5 0.9984 AML other m 2021-10-31T08:33:19.73
IV.CELI.HNE. ML:2.2 4.3664615E-5 3.8208 AML other m 2021-10-31T08:33:17.39
IV.CELI.HNN. ML:2.2 3.9476355E-5 0.7616 AML other m 2021-10-31T08:33:19.12
IV.CELI.HHE. ML:2.1 3.7033535E-5 2.1184 AML other m 2021-10-31T08:33:19.05
IV.CELI.HHN. ML:1.8 1.7545915E-5 0.7616 AML other m 2021-10-31T08:33:18.72
IV.LRP.EHE. ML:2.7 2.897271E-5 3.7632 AML other m 2021-10-31T08:34:33.77
IV.LRP.EHN. ML:2.6 2.153131E-5 22.6176 AML other m 2021-10-31T08:34:29.92
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, 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, 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.
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