Earthquake with magnitude of ML 2.0 on date 19-03-2021 and time 00:53:56 (Italy) in region 1 km W Montieri (GR)

A magnitude ML 2.0 earthquake occured in region: 1 km W Montieri (GR), on

  • 18-03-2021 23:53:56 (UTC)
  • 19-03-2021 00:53:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.13, 11.01 at 9 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montieri GR 1 1204 1204
Chiusdino SI 7 1903 3107
Castelnuovo di Val di Cecina PI 12 2231 5338
Monterotondo Marittimo GR 13 1371 6709
Massa Marittima GR 13 8375 15084
Monticiano SI 14 1571 16655
Radicondoli SI 15 914 17569
Roccastrada GR 18 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Siena (53903 inhabitants)
42 Km N of Grosseto (82087 inhabitants)
71 Km S of Scandicci (50609 inhabitants)
74 Km SE of Livorno (159219 inhabitants)
74 Km S of Firenze (382808 inhabitants)
80 Km W of Arezzo (99543 inhabitants)
82 Km SE of Pisa (89158 inhabitants)
84 Km S of Prato (191150 inhabitants)
89 Km SE of Lucca (89046 inhabitants)
90 Km S of Pistoia (90315 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
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 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 http://www.hsit.it. 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
Bulletin
Rev1000
ML 2.0 2021-03-18
23:53:56
43.1303 11.0105 9 2021-04-16
08:47:46
Bollettino Sismico Italiano INGV 88345591
Reviewed
Rev100
ML 2.1 2021-03-18
23:53:55
43.1302 11.0127 10 2021-03-19
00:00:43
Sala Sismica INGV-Roma 88263801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-18 23:53:56 ± 0.13
Latitude 43.1303 ± 0.0072
Longitude 11.0105 ± 0.0099
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88345591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 785
Semi-minor axis of confidence ellipse (meter) 689
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 151
Circular confidence region, given by single value of horizontal uncertainty (meter) 780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.08004
Epicentral distance of station farthest from the epicenter (degree) 1.03152
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 31
Type of magnitude ML
Reference to an origin 88345591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-16 08:46:26

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 23
Type of magnitude ML
Reference to an origin 88263801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-19 00:00:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RUFI.EHZ. 2021-03-18T23:54:22.21 0.6 undecidable manual S 27 0.7941 50 -0.17 43
IV.CELB.HHZ. 2021-03-18T23:54:19.62 0.6 undecidable manual S 237 0.6997 50 0.05 45
IV.PII.HHZ. 2021-03-18T23:54:18.65 0.6 undecidable manual S 329 0.688 50 -0.59 39
IV.PARC.HHZ. 2021-03-18T23:54:16.07 0.3 undecidable manual P 59 1.0315 50 0.79 51
IV.MCIV.CHZ. 2021-03-18T23:54:15.48 0.6 undecidable manual S 126 0.6007 50 -1.16 31
TV.SF04.EHZ. 2021-03-18T23:54:14.34 0.3 undecidable manual S 122 0.5594 50 -1.06 50
IV.RONT.HHZ. 2021-03-18T23:54:14.66 0.3 undecidable manual P 19 0.9155 50 1.36 39
IV.SSP9.EHZ. 2021-03-18T23:54:14.47 0.3 undecidable manual P 61 0.9272 50 0.96 48
IV.MGAB.HHZ. 2021-03-18T23:54:12.19 0.3 undecidable manual P 105 0.8337 50 0.28 62
IV.ARCI.HHZ. 2021-03-18T23:54:11.00 0.6 undecidable manual S 129 0.4389 50 -0.85 37
IV.RUFI.EHZ. 2021-03-18T23:54:11.59 0.3 undecidable manual P 27 0.7941 50 0.36 62
IV.CELB.HHZ. 2021-03-18T23:54:10.60 0.3 undecidable manual P 237 0.6997 50 0.99 50
IV.SACS.HHZ. 2021-03-18T23:54:10.73 0.3 undecidable manual P 113 0.715 50 0.86 53
IV.CSNT.HHZ. 2021-03-18T23:54:09.56 0.6 undecidable manual S 31 0.3984 50 -1.08 34
IV.PII.HHZ. 2021-03-18T23:54:09.63 0.3 undecidable manual P 329 0.688 50 0.22 65
IV.CASP.HHZ. 2021-03-18T23:54:08.76 0.6 undecidable manual S 197 0.3552 50 -0.62 42
IV.MCIV.CHZ. 2021-03-18T23:54:08.27 0.1 undecidable manual P 126 0.6007 50 0.36 86
TV.SF04.EHZ. 2021-03-18T23:54:07.53 0.1 undecidable manual P 122 0.5594 50 0.33 87
IV.MAGO.CHZ. 2021-03-18T23:54:06.17 0.6 undecidable manual S 299 0.2941 50 -1.38 30
IV.ARCI.HHZ. 2021-03-18T23:54:05.30 0.1 undecidable manual P 129 0.4389 50 0.14 93
IV.CSNT.HHZ. 2021-03-18T23:54:04.25 0.1 positive manual P 31 0.3984 50 -0.21 92
IV.CASP.HHZ. 2021-03-18T23:54:03.82 0.1 undecidable manual P 197 0.3552 50 0.1 95
IV.RIBO.EHZ. 2021-03-18T23:54:03.44 0.3 undecidable manual S 172 0.1835 115 -0.32 70
IV.MAGO.CHZ. 2021-03-18T23:54:02.39 0.1 negative manual P 299 0.2941 50 -0.28 93
IV.FROS.CHZ. 2021-03-18T23:54:01.35 0.3 undecidable manual S 53 0.1322 122 -0.7 63
IV.RIBO.EHZ. 2021-03-18T23:54:00.61 0.1 undecidable manual P 172 0.1835 115 0.13 98
IV.TRIF.CHZ. 2021-03-18T23:54:00.24 0.3 undecidable manual S 259 0.08 136 -0.24 73
IV.FROS.CHZ. 2021-03-18T23:53:59.39 0.1 positive manual P 53 0.1322 122 -0.1 99
IV.TRIF.CHZ. 2021-03-18T23:53:58.70 0.1 negative manual P 259 0.08 136 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:2.6 0.005728004 0.0896 AML other m 2021-03-18T23:54:00.47
IV.TRIF.CHN. ML:2.8 0.0080000565 0.1152 AML other m 2021-03-18T23:54:00.36
IV.FROS.CHE. ML:2.4 0.0025416015 0.1408 AML other m 2021-03-18T23:54:01.44
IV.FROS.CHN. ML:2.5 0.003015 0.16 AML other m 2021-03-18T23:54:01.65
IV.MAGO.CHN. ML:2 0.000507 0.16 AML other m 2021-03-18T23:54:06.37
IV.MAGO.CHE. ML:1.9 0.0003245 0.62 AML other m 2021-03-18T23:54:07.68
IV.CASP.HHE. ML:2.2 0.000543 0.22 AML other m 2021-03-18T23:54:09.13
IV.CASP.HHN. ML:2 0.0003659728 0.0768 AML other m 2021-03-18T23:54:09.02
IV.CSNT.HHN. ML:2.1 0.0003645 0.18 AML other m 2021-03-18T23:54:09.78
IV.CSNT.HHE. ML:1.9 0.0002505 1.84 AML other m 2021-03-18T23:54:09.02
IV.ARCI.HHE. ML:2 0.00028646145 0.1024 AML other m 2021-03-18T23:54:11.80
IV.ARCI.HHN. ML:1.9 0.0001976534 0.1792 AML other m 2021-03-18T23:54:12.10
TV.SF04.EHN. ML:2.4 0.0004573907 0.1408 AML other m 2021-03-18T23:54:14.47
IV.MGAB.HHE. ML:1.4 2.569003E-5 0.2432 AML other m 2021-03-18T23:54:14.57
IV.MCIV.CHE. ML:1.8 0.0001074528 0.1536 AML other m 2021-03-18T23:54:15.65
IV.MCIV.CHN. ML:1.8 0.0001095 0.16 AML other m 2021-03-18T23:54:16.52
TV.SF04.EHE. ML:2.3 0.000423 0.26 AML other m 2021-03-18T23:54:16.47
IV.CELB.HHN. ML:2.2 0.00024384045 0.2944 AML other m 2021-03-18T23:54:21.90
IV.CELB.HHE. ML:2 0.00016239175 0.064 AML other m 2021-03-18T23:54:20.80
IV.RUFI.EHN. ML:1.7 5.435445E-5 0.2176 AML other m 2021-03-18T23:54:22.98
IV.RUFI.EHE. ML:1.8 7.72437E-5 0.2176 AML other m 2021-03-18T23:54:22.98
IV.RONT.HHN. ML:1.9 7.64E-5 0.3 AML other m 2021-03-18T23:54:31.83
IV.RONT.HHE. ML:2 9.848489E-5 0.2816 AML other m 2021-03-18T23:54:33.88
IV.RIBO.EHE.01 ML:2.4 0.001859955 0.1792 AML other m 2021-03-18T23:54:03.84
IV.ARCI.HNE. ML:2.1 0.00032651005 0.1792 AML other m 2021-03-18T23:54:11.60
IV.ARCI.HNN. ML:2.2 0.0003842027 0.1664 AML other m 2021-03-18T23:54:11.17
IV.PII.HHE. ML:1.7 8.068258E-5 0.2944 AML other m 2021-03-18T23:54:20.08
IV.PII.HHN. ML:1.8 8.7808305E-5 0.32 AML other m 2021-03-18T23:54:20.24
IV.SACS.HHN. ML:1.2 2.301325E-5 0.6656 AML other m 2021-03-18T23:54:23.05
IV.MGAB.HHN. ML:1.4 2.27747E-5 0.2048 AML other m 2021-03-18T23:54:16.36
IV.PARC.HHN. ML:1.4 1.9571374E-5 0.3584 AML other m 2021-03-18T23:54:35.42
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