Earthquake with magnitude of ML 2.2 on date 27-09-2021 and time 16:58:14 (Italy) in region 6 km S Montieri (GR)

A magnitude ML 2.2 earthquake occured in region: 6 km S Montieri (GR), on

  • 27-09-2021 14:58:14 (UTC)
  • 27-09-2021 16:58:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.073, 11.023 at 10 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montieri GR 7 1204 1204
Chiusdino SI 11 1903 3107
Massa Marittima GR 11 8375 11482
Roccastrada GR 14 9199 20681
Monticiano SI 15 1571 22252
Monterotondo Marittimo GR 16 1371 23623
Castelnuovo di Val di Cecina PI 18 2231 25854
Gavorrano GR 19 8580 34434

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Grosseto (82087 inhabitants)
37 Km SW of Siena (53903 inhabitants)
77 Km S of Scandicci (50609 inhabitants)
79 Km SE of Livorno (159219 inhabitants)
80 Km S of Firenze (382808 inhabitants)
82 Km SW of Arezzo (99543 inhabitants)
87 Km SE of Pisa (89158 inhabitants)
90 Km S of Prato (191150 inhabitants)
96 Km SE of Lucca (89046 inhabitants)
96 Km S of Pistoia (90315 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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
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 2.2 2021-09-27
14:58:14
43.0732 11.0232 10 2021-09-27
15:04:41
Sala Sismica INGV-Roma 95950031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-27 14:58:14 ± 0.11
Latitude 43.0732 ± 0.0054
Longitude 11.0232 ± 0.0086
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95950031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 650
Semi-minor axis of confidence ellipse (meter) 506
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 261
Circular confidence region, given by single value of horizontal uncertainty (meter) 650
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 53
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.74284
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 12
Magnitude information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.5
Num. used stations 36
Type of magnitude ML
Reference to an origin 95950031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-27 15:04:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
SL.LJU.BHZ. 2021-09-27T15:00:03.27 3.0 undecidable manual Sn 2.35 0
IV.GATE.HHZ. 2021-09-27T14:59:56.75 3.0 undecidable manual Sg 10.93 0
IV.COLB.HHZ. 2021-09-27T14:59:54.02 3.0 undecidable manual Sg 9.12 0
IV.PLLN.EHZ. 2021-09-27T14:59:51.25 3.0 positive manual Pg 13.56 0
IV.CAGR.HHZ. 2021-09-27T14:59:49.72 3.0 undecidable manual Pn 5.8 0
IV.PAOL.HNZ. 2021-09-27T14:59:48.36 3.0 undecidable manual Sn 1.13 0
IV.PIPA.HHZ. 2021-09-27T14:59:37.71 3.0 positive manual Pn -0.62 0
IV.LPEL.HHZ. 2021-09-27T14:59:34.74 3.0 undecidable manual Sg 6.7 0
IV.LAV9.HNZ. 2021-09-27T14:59:09.12 3.0 undecidable manual Sn -2.19 0
GU.STV.HHZ. 2021-09-27T14:59:06.95 3.0 undecidable manual Pn 5.75 0
IV.GAVE.EHZ. 2021-09-27T14:59:00.30 3.0 undecidable manual S -0.31 0
IV.IMOL.HNZ. 2021-09-27T14:59:00.46 3.0 undecidable manual S 0.49 0
IV.POFI.HHZ. 2021-09-27T14:58:53.47 3.0 undecidable manual Pn -0.36 0
IV.APEC.HHZ. 2021-09-27T14:58:51.45 3.0 undecidable manual S -2.02 0
GU.GSCL.HHZ. 2021-09-27T14:58:40.70 3.0 positive manual P 1.62 0
IV.CAFI.HHZ. 2021-09-27T14:58:39.05 0.6 undecidable manual S 69 0.7329 50 0.13 43
IV.BRSN.HNZ. 2021-09-27T14:58:39.53 3.0 undecidable manual P -1.08 0
IV.PII.HHZ. 2021-09-27T14:58:39.03 0.6 undecidable manual S 331 0.7428 50 -0.16 43
IV.CRMI.HHZ. 2021-09-27T14:58:38.50 0.3 undecidable manual S 358 0.7231 50 -0.1 66
IV.CELB.HHZ. 2021-09-27T14:58:37.25 0.3 undecidable manual S 242 0.6781 50 -0.04 67
IV.ATVO.HHZ. 2021-09-27T14:58:35.75 3.0 undecidable manual P 0.4 0
GU.MAIM.HHZ. 2021-09-27T14:58:32.75 3.0 positive manual P -0.38 0
IV.CRE.HHZ. 2021-09-27T14:58:32.00 3.0 positive manual P 0.06 0
IV.RUFI.EHZ. 2021-09-27T14:58:31.55 3.0 negative manual P 0.03 0
IV.OSSC.HHZ. 2021-09-27T14:58:31.04 0.3 undecidable manual S 20 0.4784 50 -0.33 66
TV.SF04.EHZ. 2021-09-27T14:58:31.61 0.3 undecidable manual S 117 0.5234 50 -1.08 49
IV.MGAB.HHZ. 2021-09-27T14:58:30.53 3.0 positive manual P -0.25 0
IV.PII.HHZ. 2021-09-27T14:58:29.29 1.0 positive manual P 331 0.7428 50 0.56 20
IV.CAFI.HHZ. 2021-09-27T14:58:29.08 0.3 negative manual P 69 0.7329 50 0.51 60
IV.ARCI.HHZ. 2021-09-27T14:58:28.24 0.6 undecidable manual S 124 0.3975 50 -0.74 39
IV.CELB.HHZ. 2021-09-27T14:58:28.52 0.1 positive manual P 242 0.6781 50 0.89 69
IV.CRMI.HHZ. 2021-09-27T14:58:28.92 0.1 undecidable manual P 358 0.7231 50 0.53 80
IV.MAGO.CHZ. 2021-09-27T14:58:25.96 0.6 undecidable manual S 307 0.3327 50 -1.09 34
TV.SF04.EHZ. 2021-09-27T14:58:25.34 0.1 negative manual P 117 0.5234 50 0.36 87
IV.CASP.HHZ. 2021-09-27T14:58:25.56 0.6 undecidable manual S 202 0.3049 50 -0.66 41
IV.OSSC.HHZ. 2021-09-27T14:58:24.57 0.3 negative manual P 20 0.4784 50 0.36 66
IV.ARCI.HHZ. 2021-09-27T14:58:23.06 0.1 negative manual P 124 0.3975 50 0.22 91
IV.CASP.HHZ. 2021-09-27T14:58:21.26 0.1 positive manual P 202 0.3049 50 0.02 97
IV.MAGO.CHZ. 2021-09-27T14:58:21.73 0.1 undecidable manual P 307 0.3327 50 0.01 97
IV.FROS.CHZ. 2021-09-27T14:58:21.32 0.6 undecidable manual S 35 0.1673 118 -0.41 46
IV.RIBO.EHZ.01 2021-09-27T14:58:20.07 0.6 undecidable manual S 172 0.125 125 -0.26 48
IV.TRIF.CHZ. 2021-09-27T14:58:18.89 0.3 undecidable manual S 295 0.0971 132 -0.6 66
IV.RIBO.EHZ.01 2021-09-27T14:58:18.03 0.1 undecidable manual P 172 0.125 125 0.19 97
IV.FROS.CHZ. 2021-09-27T14:58:18.66 0.1 negative manual P 35 0.1673 118 0.01 100
IV.TRIF.CHZ. 2021-09-27T14:58:17.46 0.1 positive manual P 295 0.0971 132 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHN. ML:2.5 0.003615 0.68 AML other m 2021-09-27T14:58:19.76
IV.TRIF.CHE. ML:2.6 0.0044 0.96 AML other m 2021-09-27T14:58:19.09
IV.FROS.CHN. ML:3.1 0.010755 0.36 AML other m 2021-09-27T14:58:21.47
IV.FROS.CHE. ML:2.9 0.006345 0.72 AML other m 2021-09-27T14:58:22.47
IV.CASP.HHE. ML:2.8 0.0024 0.28 AML other m 2021-09-27T14:58:25.80
IV.CASP.HNE. ML:2.6 0.001735 0.26 AML other m 2021-09-27T14:58:25.95
IV.CASP.HHN. ML:2.7 0.00233 0.26 AML other m 2021-09-27T14:58:25.76
IV.CASP.HNN. ML:2.8 0.0027 0.24 AML other m 2021-09-27T14:58:25.78
IV.MAGO.CHN. ML:2.5 0.0011575 0.1 AML other m 2021-09-27T14:58:26.19
IV.MAGO.CHE. ML:2.1 0.0005235 0.82 AML other m 2021-09-27T14:58:26.22
IV.ARCI.HHN. ML:2.4 0.0007975 0.22 AML other m 2021-09-27T14:58:28.41
IV.ARCI.HNN. ML:2.4 0.00077 0.22 AML other m 2021-09-27T14:58:28.41
IV.ARCI.HHE. ML:2.4 0.000717 1.5 AML other m 2021-09-27T14:58:28.16
IV.ARCI.HNE. ML:2.3 0.000686 1.5 AML other m 2021-09-27T14:58:28.16
IV.OSSC.HHE. ML:2.1 0.000304 0.52 AML other m 2021-09-27T14:58:31.73
IV.OSSC.HHN. ML:2 0.0002195 0.86 AML other m 2021-09-27T14:58:32.63
TV.SF04.EHN. ML:2.6 0.000829 0.22 AML other m 2021-09-27T14:58:35.19
TV.SF04.EHE. ML:0.7 1.2305E-5 0.42 AML other m 2021-09-27T14:58:36.89
IV.CELB.HHE. ML:2.7 0.000837 0.38 AML other m 2021-09-27T14:58:39.47
IV.CELB.HHN. ML:2.5 0.0004465 0.22 AML other m 2021-09-27T14:58:39.73
IV.PII.HHN. ML:1.7 7.24E-5 0.38 AML other m 2021-09-27T14:58:40.86
IV.PII.HHE. ML:1.9 0.000109 1.62 AML other m 2021-09-27T14:58:40.81
IV.CRMI.HHN. ML:1.4 3.675E-5 0.6 AML other m 2021-09-27T14:58:41.31
IV.CRMI.HHE. ML:1.3 3.215E-5 0.66 AML other m 2021-09-27T14:58:41.32
IV.CAFI.HHE. ML:1.7 6.63E-5 1.36 AML other m 2021-09-27T14:58:43.12
IV.CAFI.HHN. ML:1.6 6.2E-5 1.26 AML other m 2021-09-27T14:58:44.88
IV.RUFI.EHE. ML:2 0.00011185 0.52 AML other m 2021-09-27T14:58:45.27
IV.MGAB.HHN. ML:1.5 3.965E-5 0.42 AML other m 2021-09-27T14:58:45.31
IV.RUFI.EHN. ML:1.9 9.48E-5 0.44 AML other m 2021-09-27T14:58:45.21
IV.MGAB.HHE. ML:1.5 4.24E-5 0.56 AML other m 2021-09-27T14:58:46.61
IV.CRE.HHN. ML:1.8 6.865E-5 0.5 AML other m 2021-09-27T14:58:46.72
IV.CRE.HHE. ML:1.8 7.0E-5 1 AML other m 2021-09-27T14:58:49.75
IV.APEC.HHE. ML:2.1 8.25E-5 1.06 AML other m 2021-09-27T14:58:58.18
IV.APEC.HHN. ML:2.2 0.0001051 0.08 AML other m 2021-09-27T14:59:05.94
IV.PAOL.HNN. ML:4 0.0006565 0.78 AML other m 2021-09-27T14:59:54.62
IV.PAOL.HNE. ML:4 0.000648 0.96 AML other m 2021-09-27T15:00:01.72
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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