Earthquake with magnitude of ML 3.2 on date 27-09-2023 and time 22:49:05 (UTC) in region Tirreno Meridionale (MARE)

A magnitude ML 3.2 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 27-09-2023 22:49:05 (UTC)
  • 28-09-2023 00:49:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.5420, 14.4510 at 454 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

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 https://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
Reviewed
Rev100
ML 3.2 2023-09-27
22:49:05
39.5415 14.451 454 2023-09-27
23:03:34
Sala Sismica INGV-Roma 121526871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-27 22:49:05 ± 0.44
Latitude 39.5415 ± 0.0414
Longitude 14.4510 ± 0.1644
Depth (km) 454 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121526871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 14086
Semi-minor axis of confidence ellipse (meter) 4304
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 86
Circular confidence region, given by single value of horizontal uncertainty (meter) 14090.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 267
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 22
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.92635
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 14
Magnitude information

ML:3.2

Field Value
Value 3.2
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 121526871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-27 23:03:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MURB.HHZ. 2023-09-27T22:51:09.10 3.0 undecidable manual Pg 5.84 0
IV.SOI.EHZ. 2023-09-27T22:50:56.61 0.6 undecidable manual S 139 213.8193 154 -0.31 32
IV.MTTG.HHZ. 2023-09-27T22:50:55.93 0.6 undecidable manual S 147 201.9423 155 0.1 36
IV.PLAC.HHZ. 2023-09-27T22:50:55.60 0.6 undecidable manual S 125 209.8344 155 -0.95 26
IV.GMB1.HHZ. 2023-09-27T22:50:55.17 0.6 undecidable manual S 142 192.363 157 0.18 37
IY.SPDC.HHZ. 2023-09-27T22:50:54.41 0.6 undecidable manual S 127 183.483 158 0.16 39
IV.CELI.HHZ. 2023-09-27T22:50:54.50 0.6 undecidable manual S 94 176.8896 158 0.79 34
IV.LAV9.HNZ. 2023-09-27T22:50:53.51 3.0 undecidable manual Pg 7.87 0
IV.CAR1.HNE. 2023-09-27T22:50:51.28 0.6 undecidable manual S 101 154.2345 161 -0.72 38
IV.CET2.HHZ. 2023-09-27T22:50:50.72 0.6 undecidable manual S 90 128.6712 164 0.39 46
IV.ACATE.EHZ. 2023-09-27T22:50:48.14 3.0 undecidable manual Sn -6.31 0
7C.SPAOL.HNZ. 2023-09-27T22:50:46.22 3.0 undecidable manual Sg 5.95 0
IV.ERC.EHZ. 2023-09-27T22:50:26.41 3.0 undecidable manual Pn -6.73 0
IY.MCDA.HHZ.00 2023-09-27T22:50:10.73 3.0 positive manual Pn 2.64 0
IV.PLAC.HHZ. 2023-09-27T22:50:09.60 0.6 undecidable manual P 125 209.8344 155 -0.14 34
IV.GMB1.HHZ. 2023-09-27T22:50:09.63 0.3 negative manual P 142 192.363 157 0.79 46
IV.SERS.HHZ. 2023-09-27T22:50:09.66 3.0 positive manual P 2.1 0
IV.SOI.EHZ. 2023-09-27T22:50:09.77 1.0 undecidable manual P 139 213.8193 154 -0.18 16
IV.PIPA.HHZ. 2023-09-27T22:50:09.93 3.0 positive manual Pn 0.1 0
IV.SELL.HHZ. 2023-09-27T22:50:09.71 3.0 positive manual P 2.43 0
IV.GRI.EHZ. 2023-09-27T22:50:09.40 0.6 undecidable manual P 115 187.1682 157 0.81 31
IV.MTTG.HHZ. 2023-09-27T22:50:09.17 1.0 undecidable manual P 147 201.9423 155 -0.16 18
IV.CELI.HHZ. 2023-09-27T22:50:09.02 0.6 undecidable manual P 94 176.8896 158 0.92 32
IY.SPDC.HHZ. 2023-09-27T22:50:08.32 0.6 positive manual P 127 183.483 158 -0.09 40
IV.GIZZ.HHE. 2023-09-27T22:50:07.09 0.1 undecidable manual P 112 163.2144 160 -0.4 82
IV.SPS2.HHZ. 2023-09-27T22:50:07.87 1.0 positive manual P 99 164.1135 160 0.33 21
IV.CET2.HHZ. 2023-09-27T22:50:06.60 0.6 undecidable manual P 90 128.6712 164 0.45 45
IV.CAR1.HNE. 2023-09-27T22:50:06.60 0.1 undecidable manual P 101 154.2345 161 -0.51 83
IV.GRIS.HNZ. 2023-09-27T22:50:05.95 0.1 undecidable manual P 79 121.7892 165 0.04 100
MN.CUC.HNE. 2023-09-27T22:50:05.94 0.1 undecidable manual P 66 126.6732 164 -0.14 97
IV.MGR.HHZ. 2023-09-27T22:50:05.49 0.1 undecidable manual P 54 114.8961 165 -0.2 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CET2.HHE. ML:3.2 0.000054690305 0.8192 AML other m 2023-09-27T22:50:18.84
IV.CET2.HHN. ML:3.2 0.00005985485 0.768 AML other m 2023-09-27T22:50:47.66
IY.SPDC.HHE. ML:3.6 0.0001103704 0.3712 AML other m 2023-09-27T22:51:00.84
IY.SPDC.HHN. ML:3.4 0.00008390259499999999 0.5376 AML other m 2023-09-27T22:50:57.72
IV.MTTG.HHE. ML:3.3 0.00006396654 1.5104 AML other m 2023-09-27T22:50:42.98
IV.MTTG.HHN. ML:3.3 0.000057306405000000004 1.1392 AML other m 2023-09-27T22:50:21.27
IV.CELI.HHE. ML:2.9 0.000024409595 0.64 AML other m 2023-09-27T22:50:58.47
IV.CELI.HHN. ML:2.8 0.000022390865 0.8576 AML other m 2023-09-27T22:51:03.54
IV.CELI.HNE. ML:3.7 0.00015664895 6.4128 AML other m 2023-09-27T22:51:08.84
IV.CELI.HNN. ML:3.2 0.000052602445 4.7744 AML other m 2023-09-27T22:51:09.34
IV.GRI.EHE. ML:3.0 0.000029549954999999997 0.448 AML other m 2023-09-27T22:50:10.09
IV.GRI.EHN. ML:2.9 0.000023996074999999997 0.3456 AML other m 2023-09-27T22:50:55.29
IV.PLAC.HHE. ML:3.1 0.000038564614999999994 0.3072 AML other m 2023-09-27T22:50:56.76
IV.PLAC.HHN. ML:3.1 0.000033115355 0.5376 AML other m 2023-09-27T22:50:59.81
IV.PLAC.HNE. ML:3.2 0.000051285375 0.8704 AML other m 2023-09-27T22:50:40.33
IV.PLAC.HNN. ML:3.6 0.00010642842499999999 4.0576 AML other m 2023-09-27T22:51:05.77
IV.GMB1.HHE. ML:3.2 0.00004320794 0.3968 AML other m 2023-09-27T22:50:58.24
IV.GMB1.HHN. ML:3.0 0.00003230728 0.192 AML other m 2023-09-27T22:50:58.66
IV.GMB1.HNE. ML:3.1 0.000039198395 0.5248 AML other m 2023-09-27T22:50:58.30
IV.GMB1.HNN. ML:3.1 0.000039532765000000006 0.576 AML other m 2023-09-27T22:50:51.32
IV.SERS.HHE. ML:2.9 0.00002641276 1.8816 AML other m 2023-09-27T22:50:56.02
IV.SERS.HHN. ML:2.8 0.000021432964999999997 0.6016 AML other m 2023-09-27T22:50:55.78
IV.SERS.HNE. ML:3.2 0.000044148005 0.8576 AML other m 2023-09-27T22:50:14.58
IV.SERS.HNN. ML:3.1 0.000042171785 1.1136 AML other m 2023-09-27T22:50:38.19
IV.SELL.HHE. ML:2.7 0.0000134352755 0.9216 AML other m 2023-09-27T22:50:14.46
IV.SELL.HHN. ML:2.5 0.00001242984 0.768 AML other m 2023-09-27T22:50:13.79
IV.SELL.HNE. ML:3.4 0.0000840859 0.5888 AML other m 2023-09-27T22:50:09.24
IV.SELL.HNN. ML:3.5 0.00010317860000000001 0.9088 AML other m 2023-09-27T22:50:35.21
IV.SOI.EHE. ML:3.1 0.000034503605 1.2288 AML other m 2023-09-27T22:50:45.08
IV.SOI.EHN. ML:3.1 0.00004162652 1.4976 AML other m 2023-09-27T22:50:53.36
IV.PIPA.HNE. ML:3.9 0.00021536685 0.7936 AML other m 2023-09-27T22:50:33.27
IV.PIPA.HNN. ML:3.9 0.00024446705 0.9728 AML other m 2023-09-27T22:50:09.59
IV.PIPA.HHE. ML:3.3 0.000053373439999999996 1.4848 AML other m 2023-09-27T22:50:25.47
IV.PIPA.HHN. ML:3.2 0.000042622035 1.1264 AML other m 2023-09-27T22:50:47.11
IY.MCDA.HHE.00 ML:3.6 0.0001121486 1.4848 AML other m 2023-09-27T22:50:44.68
IY.MCDA.HHN.00 ML:3.5 0.00009573045499999999 1.3696 AML other m 2023-09-27T22:50:19.42
IV.ERC.EHE. ML:3.3 0.000057834445 1.0496 AML other m 2023-09-27T22:50:59.28
IV.ERC.EHN. ML:3.2 0.000042987499999999995 0.9216 AML other m 2023-09-27T22:51:07.53
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