Earthquake with magnitude of ML 1.2 on date 20-05-2020 and time 09:40:08 (Italy) in region 2 km S Chiusdino (SI)

A magnitude ML 1.2 earthquake occured in region: 2 km S Chiusdino (SI), on

  • 20-05-2020 07:40:08 (UTC)
  • 20-05-2020 09:40:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.14, 11.08 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 2 1903 1903
Montieri GR 6 1204 3107
Monticiano SI 8 1571 4678
Radicondoli SI 14 914 5592
Roccastrada GR 16 9199 14791
Castelnuovo di Val di Cecina PI 16 2231 17022
Monterotondo Marittimo GR 18 1371 18393
Massa Marittima GR 19 8375 26768
Sovicille SI 20 10116 36884

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Siena (53903 inhabitants)
42 Km N of Grosseto (82087 inhabitants)
69 Km S of Scandicci (50609 inhabitants)
71 Km S of Firenze (382808 inhabitants)
74 Km W of Arezzo (99543 inhabitants)
78 Km SE of Livorno (159219 inhabitants)
82 Km S of Prato (191150 inhabitants)
84 Km SE of Pisa (89158 inhabitants)
89 Km S of Pistoia (90315 inhabitants)
91 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
Bulletin
Rev1000
ML 1.2 2020-05-20
07:40:08
43.14 11.08 9 2020-11-19
12:36:56
Bollettino Sismico Italiano INGV 81671111
Reviewed
Rev100
ML 1.5 2020-05-20
07:40:08
43.14 11.08 9 2020-05-20
07:46:02
Sala Sismica INGV-Roma 79355821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-20 07:40:08 ± 0.18
Latitude 43.14 ± 0.01
Longitude 11.08 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 81671111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1245
Semi-minor axis of confidence ellipse (meter) 803
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 320
Circular confidence region, given by single value of horizontal uncertainty (meter) 1250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.48114
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 81671111
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-08-05 10:06:31

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 79355821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-20 07:46:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2020-05-20T07:41:54.49 3.0 positive manual Pg 22.98 0
CR.ZAG.BHZ. 2020-05-20T07:41:51.68 3.0 undecidable manual Sn 2.47 0
OT.OT05.EHZ. 2020-05-20T07:41:42.87 3.0 undecidable manual Sn -1.12 0
IV.ECTS.HHZ. 2020-05-20T07:41:41.26 3.0 undecidable manual Pn 6.56 0
IV.PTRJ.HHZ. 2020-05-20T07:41:39.99 3.0 undecidable manual Sn 7.39 0
CR.STON.BHZ. 2020-05-20T07:41:31.40 3.0 positive manual Pg 18.75 0
IV.ROSPO.HHZ. 2020-05-20T07:41:30.98 3.0 undecidable manual Sn 4.63 0
IV.LPEL.HHZ. 2020-05-20T07:41:28.00 3.0 undecidable manual Sg 10.85 0
IV.ERC.EHZ. 2020-05-20T07:41:19.50 3.0 undecidable manual Pn -3.87 0
IV.EUCT.HNZ. 2020-05-20T07:40:57.67 3.0 undecidable manual Sg 0.78 0
IV.ARRO.EHZ. 2020-05-20T07:40:47.97 3.0 undecidable manual Sn -0.89 0
IV.FAGN.HHZ. 2020-05-20T07:40:44.92 3.0 positive manual Pg 8.03 0
IV.SBPO.HNZ. 2020-05-20T07:40:42.33 3.0 undecidable manual Sg 1.16 0
IV.CRND.HNZ. 2020-05-20T07:40:41.10 3.0 undecidable manual Pg 5.29 0
CH.MUGIO.HHZ. 2020-05-20T07:40:38.12 3.0 undecidable manual Pn -2.56 0
IV.NDIM.HHZ. 2020-05-20T07:40:35.13 3.0 undecidable manual Sg -2.06 0
IV.ARCI.HHZ. 2020-05-20T07:40:22.49 0.3 undecidable manual S 135 0.4074 50 -0.6 63
IV.CASP.HHZ. 2020-05-20T07:40:22.04 0.3 undecidable manual S 205 0.3858 50 -0.41 67
IV.PIEI.HHZ. 2020-05-20T07:40:21.41 3.0 undecidable manual Pg 1.44 0
TV.SF01.EHZ. 2020-05-20T07:40:18.30 0.6 undecidable manual P 133 0.4811 50 0.26 45
IV.ARCI.HHZ. 2020-05-20T07:40:17.03 0.3 undecidable manual P 135 0.4074 50 0.25 69
IV.CASP.HHZ. 2020-05-20T07:40:16.92 0.3 undecidable manual P 205 0.3858 50 0.51 65
IV.RIBO.EHZ.01 2020-05-20T07:40:16.21 0.1 undecidable manual S 188 0.1943 113 -0.09 99
IV.RIBO.EHZ.01 2020-05-20T07:40:13.25 0.1 undecidable manual P 188 0.1943 113 0.39 93
IV.TRIF.CHZ. 2020-05-20T07:40:13.81 0.3 undecidable manual S 259 0.1349 122 -0.45 69
IV.FROS.CHZ. 2020-05-20T07:40:12.42 0.3 undecidable manual S 38 0.0863 134 -0.34 72
IV.TRIF.CHZ. 2020-05-20T07:40:11.86 0.1 undecidable manual P 259 0.1349 122 0.18 98
IV.FROS.CHZ. 2020-05-20T07:40:10.95 0.1 undecidable manual P 38 0.0863 134 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:1.7 0.00065193495 0.1024 AML other m 2020-05-20T07:40:12.82
IV.FROS.CHN. ML:1.5 0.00041168845 0.1088 AML other m 2020-05-20T07:40:12.71
IV.TRIF.CHN. ML:1.3 0.0001789012 0.096 AML other m 2020-05-20T07:40:14.01
IV.TRIF.CHE. ML:1.2 0.00017162225 0.1216 AML other m 2020-05-20T07:40:14.11
IV.RIBO.EHE.01 ML:1.4 0.00016406445 0.1792 AML other m 2020-05-20T07:40:16.50
IV.CASP.HHE. ML:1 2.76245093E-5 0.1024 AML other m 2020-05-20T07:40:22.50
IV.CASP.HHN. ML:1 3.313559E-5 0.1024 AML other m 2020-05-20T07:40:22.37
IV.ARCI.HHN. ML:0.7 1.6915E-5 0.1152 AML other m 2020-05-20T07:40:23.56
IV.ARCI.HHE. ML:0.7 1.51776575E-5 0.1408 AML other m 2020-05-20T07:40:23.45
TV.SF01.EHN. ML:1.2 3.366997E-5 0.2176 AML other m 2020-05-20T07:40:26.49
TV.SF01.EHE. ML:1.2 4.1801705E-5 0.32 AML other m 2020-05-20T07:40:26.36
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