Earthquake with magnitude of ML 1.8 on date 30-08-2020 and time 04:24:09 (UTC) in region 4 km W Chiusdino (SI)

A magnitude ML 1.8 earthquake occured in region: 4 km W Chiusdino (SI), on

  • 30-08-2020 04:24:09 (UTC)
  • 30-08-2020 06:24:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.163, 11.047 at 10 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 4 1903 1903
Montieri GR 4 1204 3107
Radicondoli SI 11 914 4021
Monticiano SI 11 1571 5592
Castelnuovo di Val di Cecina PI 12 2231 7823
Monterotondo Marittimo GR 16 1371 9194
Massa Marittima GR 18 8375 17569
Roccastrada GR 20 9199 26768
Sovicille SI 20 10116 36884
Casole d'Elsa SI 20 3897 40781

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Siena (53903 inhabitants)
45 Km N of Grosseto (82087 inhabitants)
67 Km S of Scandicci (50609 inhabitants)
70 Km S of Firenze (382808 inhabitants)
74 Km SE of Livorno (159219 inhabitants)
76 Km W of Arezzo (99543 inhabitants)
80 Km S of Prato (191150 inhabitants)
81 Km SE of Pisa (89158 inhabitants)
86 Km S of Pistoia (90315 inhabitants)
88 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 1.8 2020-08-30
04:24:09
43.163 11.0467 10 2020-11-19
12:37:01
Bollettino Sismico Italiano INGV 82902251
Reviewed
Rev100
ML 1.8 2020-08-30
04:24:09
43.1642 11.0428 10 2020-08-30
04:35:15
Sala Sismica INGV-Roma 82455441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-30 04:24:09 ± 0.1
Latitude 43.1630 ± 0.0054
Longitude 11.0467 ± 0.0074
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 82902251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 609
Semi-minor axis of confidence ellipse (meter) 591
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.73654
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 82902251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-15 02:08:56

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 82455441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-30 04:35:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2020-08-30T04:25:47.91 3.0 undecidable manual Sg 6.79 0
ST.ZIAN.EHZ. 2020-08-30T04:25:39.31 3.0 undecidable manual Sn -1.31 0
XK.GIZZ.HHZ. 2020-08-30T04:25:32.67 3.0 positive manual Pg 9.71 0
IV.ZOVE.EHZ. 2020-08-30T04:25:28.15 3.0 undecidable manual Sg 7.66 0
IV.CORL.HHZ. 2020-08-30T04:25:17.73 3.0 undecidable manual Pn -2.69 0
IV.MCRV.HHZ. 2020-08-30T04:25:07.57 3.0 undecidable manual Pg 9.44 0
ST.GAGG.HHZ. 2020-08-30T04:25:06.96 3.0 positive manual Pg 11.65 0
ST.DOSS.HHZ. 2020-08-30T04:24:55.49 3.0 undecidable manual Pn 3.09 0
IV.PE3.EHZ. 2020-08-30T04:24:47.39 3.0 undecidable manual S 1.72 0
IV.CPGN.EHZ. 2020-08-30T04:24:44.96 3.0 undecidable manual S -0.69 0
IV.MAON.HHZ. 2020-08-30T04:24:34.79 0.6 undecidable manual S 175 0.7365 50 0.85 36
IV.CRTC.HHZ. 2020-08-30T04:24:31.11 3.0 negative manual P 0.65 0
IV.LAV9.HHZ. 2020-08-30T04:24:30.78 3.0 positive manual P 0.01 0
IV.FOSV.EHZ. 2020-08-30T04:24:29.54 3.0 undecidable manual P 3.64 0
TV.SF11.HHZ. 2020-08-30T04:24:28.48 1.0 undecidable manual S 122 0.5477 50 0.14 23
TV.SF01.EHZ. 2020-08-30T04:24:27.59 0.6 undecidable manual S 133 0.5153 50 0.2 46
TV.SF13.HHZ. 2020-08-30T04:24:27.79 0.6 undecidable manual S 129 0.5423 50 -0.39 44
IV.ARCI.HHZ. 2020-08-30T04:24:24.59 0.3 undecidable manual S 135 0.4416 50 -0.6 63
IV.MAON.HHZ. 2020-08-30T04:24:24.41 0.3 undecidable manual P 175 0.7365 50 0.87 53
IV.CASP.HHZ. 2020-08-30T04:24:23.17 0.3 undecidable manual S 200 0.3948 50 -0.64 63
IV.CSNT.HHZ. 2020-08-30T04:24:22.40 0.3 undecidable manual S 30 0.357 50 -0.29 70
TV.SF11.HHZ. 2020-08-30T04:24:20.44 0.3 undecidable manual P 122 0.5477 50 0.14 69
IV.MAGO.CHN. 2020-08-30T04:24:20.61 0.3 undecidable manual S 291 0.304 50 -0.5 67
TV.SF13.HHZ. 2020-08-30T04:24:20.45 0.3 undecidable manual P 129 0.5423 50 0.24 68
TV.SF01.EHZ. 2020-08-30T04:24:19.92 0.3 undecidable manual P 133 0.5153 50 0.17 69
IV.ARCI.HHZ. 2020-08-30T04:24:18.50 0.3 undecidable manual P 135 0.4416 50 0.01 72
IV.CSNT.HHZ. 2020-08-30T04:24:17.18 0.1 undecidable manual P 30 0.357 50 0.14 96
IV.RIBO.EHZ.01 2020-08-30T04:24:17.51 0.6 undecidable manual S 180 0.214 112 -0.7 42
IV.CASP.HHZ. 2020-08-30T04:24:17.81 0.3 undecidable manual P 200 0.3948 50 0.12 72
IV.MAGO.CHN. 2020-08-30T04:24:16.36 0.1 undecidable manual P 291 0.304 50 0.23 95
IV.TRIF.CHZ. 2020-08-30T04:24:14.70 0.3 undecidable manual S 245 0.1151 127 -0.18 75
IV.RIBO.EHZ.01 2020-08-30T04:24:14.44 0.6 undecidable manual P 180 0.214 112 -0.01 51
IV.FROS.CHZ. 2020-08-30T04:24:13.83 0.3 undecidable manual S 60 0.0926 133 -0.37 72
IV.FROS.CHZ. 2020-08-30T04:24:12.32 0.1 undecidable manual P 60 0.0926 133 0.18 100
IV.TRIF.CHZ. 2020-08-30T04:24:12.84 0.1 undecidable manual P 245 0.1151 127 0.31 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:2.2 0.001915 1.36 AML other m 2020-08-30T04:24:13.92
IV.FROS.CHN. ML:2 0.0011705 0.2 AML other m 2020-08-30T04:24:14.05
IV.TRIF.CHN. ML:2.1 0.001365 0.12 AML other m 2020-08-30T04:24:14.85
IV.TRIF.CHE. ML:2 0.001095 0.64 AML other m 2020-08-30T04:24:15.16
IV.RIBO.EHE.01 ML:1.8 0.0003975144 0.2016 AML other m 2020-08-30T04:24:17.79
IV.CSNT.HHE. ML:1.1 4.3749895E-5 0.0992 AML other m 2020-08-30T04:24:22.64
IV.CSNT.HHN. ML:1.1 4.4350585E-5 0.1408 AML other m 2020-08-30T04:24:22.62
IV.CASP.HHE. ML:1.6 0.0001349298 0.08 AML other m 2020-08-30T04:24:23.44
IV.CASP.HHN. ML:1.6 0.00012504588 0.0992 AML other m 2020-08-30T04:24:23.62
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