Earthquake with magnitude of ML 1.1 on date 21-09-2021 and time 12:11:43 (Italy) in region 7 km W Campagnatico (GR)

A magnitude ML 1.1 earthquake occured in region: 7 km W Campagnatico (GR), on

  • 21-09-2021 10:11:43 (UTC)
  • 21-09-2021 12:11:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.868, 11.195 at 13 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
Campagnatico GR 7 2412 2412
Grosseto GR 14 82087 84499
Civitella Paganico GR 16 3154 87653
Roccastrada GR 16 9199 96852
Cinigiano GR 17 2618 99470

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NE of Grosseto (82087 inhabitants)
51 Km S of Siena (53903 inhabitants)
87 Km SW of Arezzo (99543 inhabitants)
90 Km NW of Viterbo (67173 inhabitants)
99 Km S of Scandicci (50609 inhabitants)
99 Km NW of Civitavecchia (52991 inhabitants)
100 Km S of Firenze (382808 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 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 1.1 2021-09-21
10:11:43
42.868 11.1953 13 2021-09-21
10:21:59
Sala Sismica INGV-Roma 95693281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 10:11:43 ± 0.07
Latitude 42.8680 ± 0.0063
Longitude 11.1953 ± 0.0049
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95693281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 663
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 197
Circular confidence region, given by single value of horizontal uncertainty (meter) 660
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.36512
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 95693281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-21 10:21:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OT.OT11.EHZ. 2021-09-21T10:13:16.03 3.0 undecidable manual Sn 5.55 0
IX.RSF3.HHZ.02 2021-09-21T10:13:12.17 3.0 undecidable manual Sn -3.52 0
IV.SPS2.HHZ. 2021-09-21T10:13:12.15 3.0 negative manual Pg 14.25 0
IV.IACL.HHZ. 2021-09-21T10:13:08.52 3.0 undecidable manual Pg 14.1 0
IV.CAPR.HNZ. 2021-09-21T10:12:56.81 3.0 undecidable manual Sg 7.35 0
IV.FREG.EHZ. 2021-09-21T10:12:53.41 3.0 undecidable manual Sn -3.36 0
IV.PZUN.HHZ. 2021-09-21T10:12:41.63 3.0 negative manual Pn 0.53 0
IV.OVO.HHZ. 2021-09-21T10:12:35.79 3.0 undecidable manual Pg 7.28 0
OX.MPRI.HHZ. 2021-09-21T10:12:27.73 3.0 undecidable manual Pn 0.04 0
IV.QLNO.HHZ. 2021-09-21T10:12:21.14 3.0 undecidable manual Pg 5.75 0
IV.ZEN8.EHZ. 2021-09-21T10:12:18.78 3.0 undecidable manual Pg 2.3 0
IV.MOCL.EHZ. 2021-09-21T10:12:08.99 3.0 undecidable manual Sg 3.07 0
TV.SF11.HHN. 2021-09-21T10:11:57.02 1.0 undecidable manual S 90 0.3543 93 0.11 25
TV.SF03.EHE. 2021-09-21T10:11:57.46 0.3 undecidable manual S 100 0.3651 93 0.23 73
IV.MCIV.CHZ. 2021-09-21T10:11:57.26 0.3 undecidable manual S 104 0.3642 93 0.07 75
TV.SF04.EHZ. 2021-09-21T10:11:56.24 0.6 undecidable manual S 95 0.3426 94 -0.32 48
IV.TRIF.CHZ. 2021-09-21T10:11:56.27 0.6 undecidable manual S 319 0.3265 94 0.18 50
TV.SF14.HHN. 2021-09-21T10:11:55.58 0.1 undecidable manual S 110 0.3274 94 -0.54 91
IV.CRE.HHZ. 2021-09-21T10:11:55.23 3.0 undecidable manual P 0
IV.SEI.HHZ. 2021-09-21T10:11:54.06 3.0 undecidable manual Pn -0.64 0
IV.CASP.HHZ. 2021-09-21T10:11:53.87 0.3 undecidable manual S 252 0.2536 96 -0.08 77
IV.ARCI.HHZ. 2021-09-21T10:11:52.22 0.3 undecidable manual S 94 0.2059 99 -0.31 74
TV.SF04.EHZ. 2021-09-21T10:11:51.55 1.0 negative manual P 95 0.3426 94 0.32 24
TV.SF11.HHN. 2021-09-21T10:11:51.46 0.3 undecidable manual P 90 0.3543 93 0.03 76
TV.SF03.EHE. 2021-09-21T10:11:51.87 0.3 undecidable manual P 100 0.3651 93 0.25 73
IV.MCIV.CHZ. 2021-09-21T10:11:51.74 0.1 undecidable manual P 104 0.3642 93 0.14 99
TV.SF14.HHN. 2021-09-21T10:11:51.14 0.1 undecidable manual P 110 0.3274 94 0.17 99
IV.TRIF.CHZ. 2021-09-21T10:11:50.86 0.1 undecidable manual P 319 0.3265 94 -0.1 100
IV.RIBO.EHZ.01 2021-09-21T10:11:50.38 0.3 undecidable manual S 307 0.1358 112 -0.14 78
IV.CASP.HHZ. 2021-09-21T10:11:49.62 1.0 undecidable manual P 252 0.2536 96 -0.1 26
IV.ARCI.HHZ. 2021-09-21T10:11:49.20 0.3 negative manual P 94 0.2059 99 0.3 74
IV.RIBO.EHZ.01 2021-09-21T10:11:47.64 0.6 undecidable manual P 307 0.1358 112 -0.1 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARCI.HHN. ML:0.9 4.5914265E-5 0.2624 AML other m 2021-09-21T10:11:55.96
IV.ARCI.HHE. ML:0.9 4.957476E-5 0.2816 AML other m 2021-09-21T10:11:56.53
IV.CASP.HHE. ML:0.9 3.790797E-5 0.3968 AML other m 2021-09-21T10:11:55.27
IV.CASP.HHN. ML:0.8 3.7331085E-5 0.3008 AML other m 2021-09-21T10:11:56.43
IV.RIBO.EHE.01 ML:1.6 0.00035992405 0.3008 AML other m 2021-09-21T10:11:51.52
IV.ARCI.HNE. ML:1 6.436455E-5 0.5376 AML other m 2021-09-21T10:11:57.21
IV.ARCI.HNN. ML:0.9 5.151516E-5 0.2816 AML other m 2021-09-21T10:11:55.68
IV.CASP.HNE. ML:1.3 9.0453545E-5 0.4096 AML other m 2021-09-21T10:11:56.98
IV.CASP.HNN. ML:1.6 0.00018377755 0.6912 AML other m 2021-09-21T10:11:54.57
TV.SF04.EHN. ML:1.7 0.0001838542 0.2624 AML other m 2021-09-21T10:11:58.57
IV.CRE.HHN. ML:1.3 2.090203E-5 0.1792 AML other m 2021-09-21T10:12:03.92
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