Earthquake with magnitude of ML 1.0 on date 25-11-2020 and time 12:16:22 (Italy) in region 4 km NW Chiusdino (SI)

A magnitude ML 1.0 earthquake occured in region: 4 km NW Chiusdino (SI), on

  • 25-11-2020 11:16:22 (UTC)
  • 25-11-2020 12:16:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1850, 11.0590 at 9 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
Chiusdino SI 4 1903 1903
Montieri GR 7 1204 3107
Radicondoli SI 9 914 4021
Monticiano SI 11 1571 5592
Castelnuovo di Val di Cecina PI 13 2231 7823
Monterotondo Marittimo GR 17 1371 9194
Sovicille SI 18 10116 19310
Casole d'Elsa SI 18 3897 23207
Pomarance PI 20 5897 29104

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Siena (53903 inhabitants)
47 Km N of Grosseto (82087 inhabitants)
65 Km S of Scandicci (50609 inhabitants)
67 Km S of Firenze (382808 inhabitants)
73 Km SE of Livorno (159219 inhabitants)
74 Km W of Arezzo (99543 inhabitants)
78 Km S of Prato (191150 inhabitants)
79 Km SE of Pisa (89158 inhabitants)
84 Km S of Pistoia (90315 inhabitants)
86 Km SE of Lucca (89046 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.0 2020-11-25
11:16:22
43.1847 11.0587 9 2020-11-25
11:26:38
Sala Sismica INGV-Roma 85005081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-25 11:16:22 ± 0.13
Latitude 43.1847 ± 0.0090
Longitude 11.0587 ± 0.0136
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85005081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1339
Semi-minor axis of confidence ellipse (meter) 325
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
Circular confidence region, given by single value of horizontal uncertainty (meter) 1340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41818
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 5
Type of magnitude ML
Reference to an origin 85005081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-25 11:26:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.EHE. 2020-11-25T11:16:56.81 3.0 undecidable manual S -2.83 0
IV.ASSB.HHN. 2020-11-25T11:16:46.42 3.0 undecidable manual S -0.11 0
IV.MOMA.HHZ. 2020-11-25T11:16:44.55 3.0 undecidable manual S -2.47 0
IV.COR1.EHN. 2020-11-25T11:16:39.69 3.0 undecidable manual P -0.47 0
IV.CASP.HHZ. 2020-11-25T11:16:37.70 0.3 undecidable manual S 200 46.4202 50 -0.06 71
IV.CSNT.HHE. 2020-11-25T11:16:34.71 0.3 undecidable manual S 30 37.0296 50 -0.54 65
IV.CPGN.EHZ. 2020-11-25T11:16:34.97 3.0 undecidable manual P 0.18 0
IV.CASP.HHZ. 2020-11-25T11:16:32.10 1.0 positive manual P 200 46.4202 50 0.78 19
IV.RIBO.EHZ.01 2020-11-25T11:16:31.91 0.3 undecidable manual S 182 26.1516 110 -0.28 71
IV.CSNT.HHE. 2020-11-25T11:16:29.83 0.1 undecidable manual P 30 37.0296 50 -0.05 97
IV.MAGO.CHN. 2020-11-25T11:16:29.86 0.3 undecidable manual P 287 33.8439 50 0.47 67
IV.RIBO.EHZ.01 2020-11-25T11:16:28.49 0.6 undecidable manual P 182 26.1516 110 0.38 46
IV.TRIF.CHE. 2020-11-25T11:16:28.13 0.3 undecidable manual S 239 14.7741 122 -0.5 69
IV.FROS.CHZ. 2020-11-25T11:16:26.82 0.3 undecidable manual S 71 8.3805 138 -0.09 76
IV.TRIF.CHE. 2020-11-25T11:16:26.14 0.1 undecidable manual P 239 14.7741 122 0.08 100
IV.FROS.CHZ. 2020-11-25T11:16:25.41 0.1 positive manual P 71 8.3805 138 0.35 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:1.2 0.00022755705000000002 0.4736 AML other m 2020-11-25T11:16:29.67
IV.FROS.CHN. ML:1.4 0.0003932493 0.0896 AML other m 2020-11-25T11:16:27.24
IV.RIBO.EHE.01 ML:0.9 0.00004598802 0.3008 AML other m 2020-11-25T11:16:36.65
IV.CASP.HHN. ML:0.5 0.000011780175000000001 0.5632 AML other m 2020-11-25T11:16:39.31
IV.CASP.HHE. ML:0.8 0.00002077124 0.1856 AML other m 2020-11-25T11:16:42.19
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