Earthquake with magnitude of ML 1.9 on date 30-09-2021 and time 14:55:42 (Italy) in region 2 km NW Montieri (GR)

A magnitude ML 1.9 earthquake occured in region: 2 km NW Montieri (GR), on

  • 30-09-2021 12:55:42 (UTC)
  • 30-09-2021 14:55:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.146, 11.005 at 8 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 2 1204 1204
Chiusdino SI 7 1903 3107
Castelnuovo di Val di Cecina PI 11 2231 5338
Monterotondo Marittimo GR 12 1371 6709
Radicondoli SI 13 914 7623
Massa Marittima GR 14 8375 15998
Monticiano SI 14 1571 17569
Roccastrada GR 20 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Siena (53903 inhabitants)
44 Km N of Grosseto (82087 inhabitants)
70 Km S of Scandicci (50609 inhabitants)
72 Km SE of Livorno (159219 inhabitants)
72 Km S of Firenze (382808 inhabitants)
80 Km W of Arezzo (99543 inhabitants)
80 Km SE of Pisa (89158 inhabitants)
82 Km S of Prato (191150 inhabitants)
88 Km SE of Lucca (89046 inhabitants)
88 Km S of Pistoia (90315 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 1.9 2021-09-30
12:55:42
43.1457 11.0052 8 2021-09-30
13:04:11
Sala Sismica INGV-Roma 96066421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-30 12:55:42 ± 0.09
Latitude 43.1457 ± 0.0063
Longitude 11.0052 ± 0.0099
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96066421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 699
Semi-minor axis of confidence ellipse (meter) 674
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 123
Circular confidence region, given by single value of horizontal uncertainty (meter) 700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.85256
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 96066421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-30 13:04:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.RSP.HHZ. 2021-09-30T12:57:32.80 3.0 undecidable manual Sg 16.66 0
IV.IOCA.HHZ. 2021-09-30T12:57:22.22 3.0 undecidable manual Sg 9.72 0
SL.LJU.BHZ. 2021-09-30T12:56:57.12 3.0 negative manual Pg 15.36 0
IV.ZEN8.EHZ. 2021-09-30T12:56:55.74 3.0 undecidable manual Sn 0.58 0
MN.VSL.HHZ. 2021-09-30T12:56:43.26 3.0 negative manual Pn 1.44 0
IV.SBPO.HNZ. 2021-09-30T12:56:41.64 3.0 undecidable manual Sg 0.99 0
IV.PE3.EHZ. 2021-09-30T12:56:21.12 3.0 undecidable manual S -2.44 0
IV.CRE.HHZ. 2021-09-30T12:56:11.08 3.0 undecidable manual S 0
IV.BOSL.HHZ. 2021-09-30T12:56:11.26 0.1 undecidable manual S 19 0.8292 50 0.7 73
GU.MAIM.HHZ. 2021-09-30T12:56:10.44 0.3 undecidable manual S 334 0.8526 50 -0.81 52
IV.RUFI.EHZ. 2021-09-30T12:56:09.18 0.3 undecidable manual S 28 0.7824 50 0 66
IV.CRMI.HHZ. 2021-09-30T12:56:04.84 0.6 undecidable manual S 358 0.6493 50 -0.41 42
IV.CASP.HHZ. 2021-09-30T12:56:02.06 0.1 undecidable manual P 0.3696 1.105 0
GU.POPM.HHZ. 2021-09-30T12:56:01.25 3.0 undecidable manual P 0.01 0
IV.LMD.HHZ. 2021-09-30T12:56:01.86 3.0 undecidable manual P -1.83 0
IV.CRE.HHZ. 2021-09-30T12:56:00.38 3.0 undecidable manual P 0
GU.MAIM.HHZ. 2021-09-30T12:56:00.10 0.6 undecidable manual P 334 0.8526 50 0.83 35
IV.BOSL.HHZ. 2021-09-30T12:55:59.05 0.1 undecidable manual P 19 0.8292 50 0.17 85
IV.RUFI.EHZ. 2021-09-30T12:55:58.62 1.0 positive manual P 28 0.7824 50 0.54 20
IV.MOCL.EHZ. 2021-09-30T12:55:58.87 3.0 undecidable manual P -1.42 0
IV.CAFI.HHZ. 2021-09-30T12:55:57.26 0.1 negative manual P 75 0.7231 50 0.19 86
IV.OSSC.HHZ. 2021-09-30T12:55:57.89 0.3 undecidable manual S 25 0.4164 50 -0.44 66
IV.CELB.HHZ. 2021-09-30T12:55:57.56 3.0 positive manual P 0.32 0
IV.CRMI.HHZ. 2021-09-30T12:55:56.12 0.3 negative manual P 358 0.6493 50 0.31 64
IV.CSNT.HHZ. 2021-09-30T12:55:56.66 0.3 undecidable manual S 32 0.3876 50 -0.81 57
IV.PII.HHZ. 2021-09-30T12:55:56.50 0.6 negative manual P 329 0.6727 50 0.29 43
IV.MCIV.CHZ. 2021-09-30T12:55:55.34 0.1 undecidable manual P 127 0.6133 50 0.16 89
TV.SF04.EHZ. 2021-09-30T12:55:54.62 0.1 positive manual P 123 0.5702 50 0.17 90
IV.ARCI.HHZ. 2021-09-30T12:55:52.34 0.1 negative manual P 130 0.4524 50 -0.09 93
IV.OSSC.HHZ. 2021-09-30T12:55:51.71 0.6 positive manual P 25 0.4164 50 -0.1 47
IV.CSNT.HHZ. 2021-09-30T12:55:51.19 0.1 positive manual P 32 0.3876 50 -0.13 94
IV.RIBO.EHZ.01 2021-09-30T12:55:50.63 0.3 undecidable manual S 171 0.1988 110 -0.46 68
IV.FROS.CHZ. 2021-09-30T12:55:48.33 0.6 undecidable manual S 60 0.1277 120 -0.26 48
IV.RIBO.EHZ.01 2021-09-30T12:55:47.58 0.3 undecidable manual P 171 0.1988 110 -0.05 74
IV.TRIF.CHZ. 2021-09-30T12:55:47.03 0.1 undecidable manual S 248 0.0809 132 -0.11 100
IV.FROS.CHZ. 2021-09-30T12:55:46.36 0.1 positive manual P 60 0.1277 120 0.17 98
IV.TRIF.CHZ. 2021-09-30T12:55:45.52 0.1 negative manual P 248 0.0809 132 0.17 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHN. ML:3.2 0.022 0.18 AML other m 2021-09-30T12:55:47.16
IV.TRIF.CHE. ML:3.1 0.02125 0.14 AML other m 2021-09-30T12:55:47.91
IV.FROS.CHN. ML:3 0.01056 0.4 AML other m 2021-09-30T12:55:48.73
IV.FROS.CHE. ML:2.7 0.005205 1.1 AML other m 2021-09-30T12:55:49.72
IV.CSNT.HHN. ML:2.1 0.000423 1.84 AML other m 2021-09-30T12:55:56.94
IV.CSNT.HHE. ML:2.1 0.0004025 1.5 AML other m 2021-09-30T12:55:57.99
IV.ARCI.HHE. ML:2.1 0.0003305 0.54 AML other m 2021-09-30T12:55:58.59
IV.OSSC.HHE. ML:1.8 0.000179 0.9 AML other m 2021-09-30T12:55:58.48
IV.ARCI.HHN. ML:2.2 0.000388 0.44 AML other m 2021-09-30T12:55:59.19
IV.OSSC.HHN. ML:1.7 0.0001595 0.54 AML other m 2021-09-30T12:56:01.61
IV.MCIV.CHE. ML:1.9 0.0001325 0.18 AML other m 2021-09-30T12:56:02.74
IV.MCIV.CHN. ML:1.7 9.23E-5 1.68 AML other m 2021-09-30T12:56:05.05
IV.CRMI.HHN. ML:1.4 4.715E-5 0.5 AML other m 2021-09-30T12:56:06.46
IV.PII.HHN. ML:2 0.0001665 1.7 AML other m 2021-09-30T12:56:07.97
IV.PII.HHE. ML:2 0.0001465 0.24 AML other m 2021-09-30T12:56:07.81
IV.CRMI.HHE. ML:1.3 3.015E-5 0.76 AML other m 2021-09-30T12:56:08.69
IV.CELB.HHE. ML:2.4 0.0003325 1.68 AML other m 2021-09-30T12:56:08.87
IV.CELB.HHN. ML:2.3 0.0002645 0.48 AML other m 2021-09-30T12:56:08.94
IV.CAFI.HHE. ML:1.5 3.93E-5 0.74 AML other m 2021-09-30T12:56:09.80
IV.MOCL.EHE. ML:1.9 8.565E-5 0.44 AML other m 2021-09-30T12:56:10.55
IV.MOCL.EHN. ML:1.9 8.175E-5 0.42 AML other m 2021-09-30T12:56:10.96
IV.RUFI.EHE. ML:1.8 7.7095E-5 1.52 AML other m 2021-09-30T12:56:11.97
IV.CAFI.HHN. ML:1.5 4.125E-5 0.82 AML other m 2021-09-30T12:56:12.93
IV.RUFI.EHN. ML:1.7 6.175E-5 1.2 AML other m 2021-09-30T12:56:12.04
IV.CRE.HHN. ML:1.8 7.315E-5 1.68 AML other m 2021-09-30T12:56:14.84
IV.BOSL.HHN. ML:1.6 4.015E-5 0.42 AML other m 2021-09-30T12:56:14.38
IV.BOSL.HHE. ML:1.6 4.355E-5 1.38 AML other m 2021-09-30T12:56:15.05
GU.POPM.HHN. ML:1.8 5.55E-5 0.42 AML other m 2021-09-30T12:56:15.23
IV.CRE.HHE. ML:1.8 7.735E-5 1.24 AML other m 2021-09-30T12:56:16.84
GU.POPM.HHE. ML:1.8 5.96E-5 1.18 AML other m 2021-09-30T12:56:17.09
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