Earthquake with magnitude of ML 1.3 on date 01-12-2021 and time 14:50:03 (Italy) in region 1 km NE Montieri (GR)

A magnitude ML 1.3 earthquake occured in region: 1 km NE Montieri (GR), on

  • 01-12-2021 13:50:03 (UTC)
  • 01-12-2021 14:50:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.138, 11.027 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 1 1204 1204
Chiusdino SI 5 1903 3107
Castelnuovo di Val di Cecina PI 12 2231 5338
Monticiano SI 13 1571 6909
Monterotondo Marittimo GR 14 1371 8280
Radicondoli SI 14 914 9194
Massa Marittima GR 15 8375 17569
Roccastrada GR 18 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SW of Siena (53903 inhabitants)
43 Km N of Grosseto (82087 inhabitants)
70 Km S of Scandicci (50609 inhabitants)
73 Km S of Firenze (382808 inhabitants)
74 Km SE of Livorno (159219 inhabitants)
78 Km W of Arezzo (99543 inhabitants)
82 Km SE of Pisa (89158 inhabitants)
83 Km S of Prato (191150 inhabitants)
89 Km S of Pistoia (90315 inhabitants)
89 Km SE of Lucca (89046 inhabitants)
Recent and historical seismicity
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
Reviewed
Rev100
ML 1.3 2021-12-01
13:50:03
43.138 11.0267 10 2021-12-01
14:18:31
Sala Sismica INGV-Roma 98016971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-01 13:50:03 ± 0.1
Latitude 43.1380 ± 0.0063
Longitude 11.0267 ± 0.0099
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 98016971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 879
Semi-minor axis of confidence ellipse (meter) 240
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 122
Circular confidence region, given by single value of horizontal uncertainty (meter) 880
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.43527
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 98016971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-01 14:18:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BSSO.HHZ. 2021-12-01T13:51:49.33 3.0 undecidable manual Sg 11.45 0
IV.VTIR.HHZ. 2021-12-01T13:51:47.07 3.0 undecidable manual Sn -0.14 0
OX.MPRI.HHZ. 2021-12-01T13:51:21.80 3.0 undecidable manual Sn -1.5 0
IX.CSG3.HNZ.01 2021-12-01T13:51:04.72 3.0 undecidable manual Pn -0.1 0
IV.MILN.HNZ. 2021-12-01T13:51:00.08 3.0 undecidable manual Sg 5.72 0
OT.OT17.EHZ. 2021-12-01T13:50:57.88 3.0 positive manual Pn 0.6 0
IV.VENL.EHZ. 2021-12-01T13:50:31.64 3.0 negative manual Pn 0.76 0
IV.MDAR.HNZ. 2021-12-01T13:50:26.31 3.0 undecidable manual Pn -1.99 0
IV.OSSC.HHZ. 2021-12-01T13:50:18.21 0.3 undecidable manual S 22 0.4173 50 -0.28 68
IV.CASP.HHZ. 2021-12-01T13:50:16.49 0.3 undecidable manual S 199 0.3669 50 -0.51 65
IV.IMOL.HNZ. 2021-12-01T13:50:14.94 3.0 negative manual P -1.47 0
IV.MAGO.CHN. 2021-12-01T13:50:14.20 1.0 undecidable manual S 297 0.3004 50 -0.85 19
IV.ARCI.HNZ. 2021-12-01T13:50:12.65 0.1 undecidable manual P 131 0.4353 50 0.23 91
IV.OSSC.HHZ. 2021-12-01T13:50:12.36 0.3 undecidable manual P 22 0.4173 50 0.25 68
IV.CASP.HHZ. 2021-12-01T13:50:11.55 0.1 undecidable manual P 199 0.3669 50 0.3 91
IV.RIBO.EHZ.01 2021-12-01T13:50:10.88 0.6 undecidable manual S 176 0.1898 115 -0.57 44
IV.MAGO.CHN. 2021-12-01T13:50:10.24 0.1 undecidable manual P 297 0.3004 50 0.12 96
IV.FROS.CHZ. 2021-12-01T13:50:08.75 0.3 undecidable manual S 53 0.1187 127 -0.34 71
IV.RIBO.EHZ.01 2021-12-01T13:50:08.23 0.1 undecidable manual P 176 0.1898 115 0.19 97
IV.TRIF.CHZ. 2021-12-01T13:50:08.17 0.3 undecidable manual S 256 0.0935 133 -0.17 74
IV.TRIF.CHZ. 2021-12-01T13:50:06.54 0.1 negative manual P 256 0.0935 133 0.29 96
IV.FROS.CHZ. 2021-12-01T13:50:06.77 0.1 undecidable manual P 53 0.1187 127 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:1.7 0.0006883584 0.0832 AML other m 2021-12-01T13:50:08.25
IV.TRIF.CHN. ML:1.9 0.00103710815 0.096 AML other m 2021-12-01T13:50:08.28
IV.FROS.CHN. ML:1.2 0.000170185 0.1472 AML other m 2021-12-01T13:50:08.95
IV.FROS.CHE. ML:1 0.000114288345 0.1088 AML other m 2021-12-01T13:50:09.01
IV.RIBO.EHE.01 ML:1.2 0.000111391375 0.16 AML other m 2021-12-01T13:50:11.19
IV.RIBO.EHN.01 ML:1.3 0.00013166844 0.1216 AML other m 2021-12-01T13:50:11.28
IV.CASP.HNE. ML:1.5 0.00011139479 1.152 AML other m 2021-12-01T13:50:17.02
IV.CASP.HNN. ML:1.6 0.00012702756 0.7552 AML other m 2021-12-01T13:50:16.12
IV.CASP.HHE. ML:1.2 5.7741595E-5 0.224 AML other m 2021-12-01T13:50:16.67
IV.CASP.HHN. ML:1 3.452699E-5 0.0768 AML other m 2021-12-01T13:50:16.72
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download