Earthquake with magnitude of ML 0.5 on date 20-05-2020 and time 06:42:17 (Italy) in region 1 km SW Chiusdino (SI)

A magnitude ML 0.5 earthquake occured in region: 1 km SW Chiusdino (SI), on

  • 20-05-2020 04:42:17 (UTC)
  • 20-05-2020 06:42:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1480, 11.0760 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 1 1903 1903
Montieri GR 5 1204 3107
Monticiano SI 9 1571 4678
Radicondoli SI 13 914 5592
Castelnuovo di Val di Cecina PI 15 2231 7823
Roccastrada GR 17 9199 17022
Monterotondo Marittimo GR 18 1371 18393
Massa Marittima GR 19 8375 26768
Sovicille SI 19 10116 36884

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Siena (53903 inhabitants)
43 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)
77 Km SE of Livorno (159219 inhabitants)
82 Km S of Prato (191150 inhabitants)
83 Km SE of Pisa (89158 inhabitants)
88 Km S of Pistoia (90315 inhabitants)
90 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 0.5 2020-05-20
04:42:17
43.1475 11.0757 9 2020-05-20
05:17:49
Sala Sismica INGV-Roma 79353691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-20 04:42:17 ± 0.24
Latitude 43.1475 ± 0.0126
Longitude 11.0757 ± 0.0173
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 79353691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1534
Semi-minor axis of confidence ellipse (meter) 981
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 324
Circular confidence region, given by single value of horizontal uncertainty (meter) 1530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38851
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 5
Type of magnitude ML
Reference to an origin 79353691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-20 05:17:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CPTP.HHZ. 2020-05-20T04:44:08.03 3.0 positive manual Pg 19.93 0
OT.OT05.EHZ. 2020-05-20T04:44:06.05 3.0 undecidable manual Sg 10.03 0
OT.OT11.EHZ. 2020-05-20T04:44:02.57 3.0 undecidable manual Sg 8.74 0
IV.CPOZ.HHZ. 2020-05-20T04:43:58.51 3.0 undecidable manual Sg 9.38 0
IV.MSAG.HHZ. 2020-05-20T04:43:55.50 3.0 undecidable manual Sn -4.74 0
IV.ECTS.HHZ. 2020-05-20T04:43:49.80 3.0 undecidable manual Pn 3.61 0
CH.FUORN.HHZ. 2020-05-20T04:43:43.21 3.0 undecidable manual Sg 1.09 0
IV.PZUN.HHZ. 2020-05-20T04:43:32.45 3.0 negative manual Pg 12.38 0
OT.OT13.EHZ. 2020-05-20T04:43:13.10 3.0 negative manual Pn -0.72 0
GU.RNCA.HHZ. 2020-05-20T04:43:10.32 3.0 undecidable manual Sn -0.52 0
IT.RMMM.HGZ. 2020-05-20T04:43:08.79 3.0 undecidable manual Sg -0.86 0
CH.FUORN.HHZ. 2020-05-20T04:43:03.80 3.0 undecidable manual Pg 1.55 0
ST.RONC.EHZ. 2020-05-20T04:42:53.95 3.0 positive manual Pg 0.98 0
IV.CASP.HHZ. 2020-05-20T04:42:31.57 0.3 undecidable manual S 203 43.1235 50 -0.54 65
IV.RIBO.EHZ.01 2020-05-20T04:42:26.03 0.3 undecidable manual S 186 22.1556 113 -0.03 75
IV.CASP.HHZ. 2020-05-20T04:42:26.43 0.3 undecidable manual P 203 43.1235 50 0.39 67
IV.TRIF.CHZ. 2020-05-20T04:42:23.38 0.3 undecidable manual S 256 14.4744 122 -0.3 72
IV.RIBO.EHZ.01 2020-05-20T04:42:22.83 0.6 undecidable manual P 186 22.1556 113 0.29 48
IV.TRIF.CHZ. 2020-05-20T04:42:21.49 0.1 positive manual P 256 14.4744 122 0.32 96
IV.FROS.CHZ. 2020-05-20T04:42:21.95 0.3 undecidable manual S 43 9.4794 134 -0.38 72
IV.FROS.CHZ. 2020-05-20T04:42:20.54 0.1 undecidable manual P 43 9.4794 134 0.15 100
IV.FIR.HHZ. 2020-05-20T04:42:15.77 3.0 undecidable manual P -0.99 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:0.5 0.000035826505 0.0704 AML other m 2020-05-20T04:42:23.62
IV.TRIF.CHN. ML:0.6 0.00004165552 0.112 AML other m 2020-05-20T04:42:23.56
IV.RIBO.EHE.01 ML:0.5 0.000018321057300000004 0.6592 AML other m 2020-05-20T04:42:26.09
IV.CASP.HHN. ML:0.5 0.000010441366 0 AML other m 2020-05-20T04:42:32.24
IV.CASP.HHE. ML:0.5 0.000011158885 1.4784 AML other m 2020-05-20T04:42:31.69
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