Earthquake with magnitude of ML 1.2 on date 05-09-2021 and time 17:51:54 (Italy) in region 7 km SW Radicondoli (SI)

A magnitude ML 1.2 earthquake occured in region: 7 km SW Radicondoli (SI), on

  • 05-09-2021 15:51:54 (UTC)
  • 05-09-2021 17:51:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.199, 11.014 at 7 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
Radicondoli SI 7 914 914
Montieri GR 8 1204 2118
Chiusdino SI 8 1903 4021
Castelnuovo di Val di Cecina PI 9 2231 6252
Monterotondo Marittimo GR 14 1371 7623
Monticiano SI 15 1571 9194
Casole d'Elsa SI 16 3897 13091
Pomarance PI 16 5897 18988
Massa Marittima GR 19 8375 27363
Sovicille SI 20 10116 37479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km W of Siena (53903 inhabitants)
49 Km N of Grosseto (82087 inhabitants)
64 Km S of Scandicci (50609 inhabitants)
67 Km SW of Firenze (382808 inhabitants)
69 Km SE of Livorno (159219 inhabitants)
76 Km SE of Pisa (89158 inhabitants)
76 Km S of Prato (191150 inhabitants)
76 Km W of Arezzo (99543 inhabitants)
82 Km S of Pistoia (90315 inhabitants)
83 Km SE of Lucca (89046 inhabitants)
97 Km SE of Viareggio (62467 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 1.2 2021-09-05
15:51:54
43.1992 11.0138 7 2021-09-05
16:13:04
Sala Sismica INGV-Roma 95078901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-05 15:51:54 ± 0.19
Latitude 43.1992 ± 0.0135
Longitude 11.0138 ± 0.0136
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95078901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1580
Semi-minor axis of confidence ellipse (meter) 278
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 331
Circular confidence region, given by single value of horizontal uncertainty (meter) 1580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.59625
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 95078901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-05 16:13:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARCI.HHZ. 2021-09-05T15:52:12.06 1.0 undecidable manual S 136 0.4838 50 -0.28 23
IV.CASP.HNE. 2021-09-05T15:52:09.52 0.6 undecidable manual S 195 0.4227 50 -0.99 36
IV.OSSC.HHE. 2021-09-05T15:52:08.33 1.0 undecidable manual S 27 0.3651 50 -0.5 22
TV.SF04.EHZ. 2021-09-05T15:52:07.44 0.1 undecidable manual P 127 0.5963 50 0.66 80
IV.SF14.HHZ. 2021-09-05T15:52:06.21 3.0 undecidable manual P 0
IV.ARCI.HHZ. 2021-09-05T15:52:05.08 0.1 undecidable manual P 136 0.4838 50 0.22 93
IV.CASP.HNE. 2021-09-05T15:52:03.71 0.1 undecidable manual P 195 0.4227 50 -0.1 96
IV.OSSC.HHE. 2021-09-05T15:52:02.65 0.3 undecidable manual P 27 0.3651 50 -0.19 72
IV.MAGO.CHE. 2021-09-05T15:52:00.83 0.3 undecidable manual P 286 0.2698 103 0.02 76
IV.TRIF.CHZ. 2021-09-05T15:51:59.60 0.3 undecidable manual S 224 0.1169 119 -0.18 75
IV.FROS.CHZ. 2021-09-05T15:51:58.65 0.1 undecidable manual S 84 0.1043 121 -0.71 86
IV.FROS.CHZ. 2021-09-05T15:51:58.03 0.1 undecidable manual P 84 0.1043 121 0.66 88
IV.TRIF.CHZ. 2021-09-05T15:51:57.81 0.1 undecidable manual P 224 0.1169 119 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:1.6 0.0004518772 0.0896 AML other m 2021-09-05T15:51:59.74
IV.TRIF.CHN. ML:1.5 0.00041317165 0.0896 AML other m 2021-09-05T15:52:00.31
IV.FROS.CHN. ML:1.4 0.0002995 0.18 AML other m 2021-09-05T15:52:00.74
IV.FROS.CHE. ML:1.3 0.00024670255 0.128 AML other m 2021-09-05T15:52:00.71
IV.ARCI.HHE. ML:1 2.2942445E-5 1.28 AML other m 2021-09-05T15:52:05.78
IV.ARCI.HHN. ML:0.9 1.7512239E-5 1.1776 AML other m 2021-09-05T15:52:25.22
IV.ARCI.HNE. ML:1.4 6.2533395E-5 1.1776 AML other m 2021-09-05T15:52:10.28
IV.ARCI.HNN. ML:1.2 3.569422E-5 0.768 AML other m 2021-09-05T15:52:15.93
TV.SF04.EHE. ML:0.7 8.120181E-6 1.2032 AML other m 2021-09-05T15:52:27.65
TV.SF04.EHN. ML:1.2 2.8570785E-5 0.3968 AML other m 2021-09-05T15:52:18.76
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