Earthquake with magnitude of ML 0.9 on date 09-03-2020 and time 18:17:17 (UTC) in region 3 km N Castiglione d'Orcia (SI)

A magnitude ML 0.9 earthquake occured in region: 3 km N Castiglione d'Orcia (SI), on

  • 09-03-2020 18:17:17 (UTC)
  • 09-03-2020 19:17:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.03, 11.61 at 14 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
Castiglione d'Orcia SI 3 2346 2346
San Quirico d'Orcia SI 4 2662 5008
Pienza SI 8 2107 7115
Montalcino SI 10 5093 12208
Seggiano GR 12 961 13169
San Giovanni d'Asso SI 14 853 14022
Buonconvento SI 16 3173 17195
Montepulciano SI 16 14097 31292
Castel del Piano GR 16 4690 35982
Abbadia San Salvatore SI 17 6444 42426
Arcidosso GR 18 4285 46711
Trequanda SI 19 1254 47965
Chianciano Terme SI 19 7105 55070
Radicofani SI 20 1097 56167

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km SE of Siena (53903 inhabitants)
50 Km NE of Grosseto (82087 inhabitants)
54 Km SW of Arezzo (99543 inhabitants)
64 Km W of Perugia (166134 inhabitants)
79 Km NW of Viterbo (67173 inhabitants)
87 Km SE of Firenze (382808 inhabitants)
88 Km SE of Scandicci (50609 inhabitants)
90 Km W of Foligno (57155 inhabitants)
100 Km NW of Terni (111501 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 0.9 2020-03-09
18:17:17
43.03 11.61 14 2020-03-09
18:34:25
Sala Sismica INGV-Roma 77158031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-09 18:17:17 ± 0.15
Latitude 43.03 ± 0.01
Longitude 11.61 ± 0.01
Depth (km) 14 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77158031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1149
Semi-minor axis of confidence ellipse (meter) 354
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 242
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 189
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50092
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 77158031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-09 18:34:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SOLUN.HHZ. 2020-03-09T18:19:14.19 3.0 undecidable manual Sn 1.78 0
CR.STON.BHZ. 2020-03-09T18:19:05.24 3.0 undecidable manual Sn -1.26 0
ST.PANI.EHZ. 2020-03-09T18:18:59.65 3.0 undecidable manual Sg 10.22 0
AC.VLO.HHZ. 2020-03-09T18:18:40.65 3.0 undecidable manual Pn -0.67 0
IV.QLNO.HHZ. 2020-03-09T18:18:38.33 3.0 undecidable manual Sn -0.81 0
CR.ZAG.BHZ. 2020-03-09T18:18:32.92 3.0 negative manual Pg 13.42 0
CH.DAVOX.HHZ. 2020-03-09T18:18:29.32 3.0 positive manual Pg 8.76 0
IV.NDIM.HNZ. 2020-03-09T18:18:28.58 3.0 undecidable manual Sg 5.53 0
IV.MUCR.HHZ. 2020-03-09T18:18:23.19 3.0 undecidable manual Pn -3.22 0
IV.ERC.EHZ. 2020-03-09T18:18:22.08 3.0 undecidable manual Pn 2.77 0
IV.SPS2.HHZ. 2020-03-09T18:18:18.92 3.0 negative manual Pn -2.79 0
CR.STON.BHZ. 2020-03-09T18:18:13.46 3.0 negative manual Pn -3.77 0
NI.VINO.HHZ. 2020-03-09T18:18:13.71 3.0 undecidable manual Pg 1.83 0
IV.PTRJ.HHZ. 2020-03-09T18:18:13.27 3.0 undecidable manual Sn -3.18 0
IV.BOZZ.HNZ. 2020-03-09T18:17:59.90 3.0 negative manual Pg 2.89 0
OT.OT05.EHZ. 2020-03-09T18:17:57.25 3.0 positive manual Pn -0.41 0
IV.VVLD.HHZ. 2020-03-09T18:17:56.94 3.0 undecidable manual Sn 0.94 0
IV.ARVD.HHZ. 2020-03-09T18:17:50.67 3.0 undecidable manual Sg -2.12 0
IV.LPEL.HHZ. 2020-03-09T18:17:41.30 3.0 undecidable manual Pn -0.9 0
IV.CSNT.HHE. 2020-03-09T18:17:34.27 0.6 undecidable manual S 333 0.5009 94 -0.5 43
IV.RIBO.EHZ.01 2020-03-09T18:17:32.21 0.6 undecidable manual S 259 0.4182 95 -0.13 48
IV.FROS.CHZ. 2020-03-09T18:17:31.44 0.6 undecidable manual S 299 0.3759 96 0.34 48
TV.SF14.HHE. 2020-03-09T18:17:27.66 0.3 undecidable manual S 179 0.2734 100 -0.44 71
IV.RIBO.EHZ.01 2020-03-09T18:17:26.20 0.3 undecidable manual P 259 0.4182 95 0.15 74
IV.CSNT.HHE. 2020-03-09T18:17:26.90 0.6 undecidable manual P 333 0.5009 94 -0.56 42
TV.SF01.EHZ. 2020-03-09T18:17:26.27 0.3 undecidable manual S 189 0.2194 104 -0.25 74
TV.SF03.EHZ. 2020-03-09T18:17:26.68 0.6 undecidable manual S 166 0.2329 103 -0.24 50
IV.ARCI.HHZ. 2020-03-09T18:17:26.27 0.3 undecidable manual S 209 0.2014 106 0.25 75
IV.FROS.CHZ. 2020-03-09T18:17:25.46 0.1 undecidable manual P 299 0.3759 96 0.13 100
TV.SF04.EHZ. 2020-03-09T18:17:25.61 0.6 undecidable manual S 169 0.197 107 -0.27 50
TV.SF13.HHE. 2020-03-09T18:17:25.97 0.6 undecidable manual S 178 0.2104 105 -0.3 49
TV.SF11.HHE. 2020-03-09T18:17:24.83 0.3 undecidable manual S 162 0.1682 112 -0.26 75
TV.SF03.EHZ. 2020-03-09T18:17:23.21 0.3 undecidable manual P 166 0.2329 103 0.29 73
TV.SF14.HHE. 2020-03-09T18:17:23.39 0.1 undecidable manual P 179 0.2734 100 -0.21 99
IV.ARCI.HHZ. 2020-03-09T18:17:22.39 0.3 undecidable manual P 209 0.2014 106 -0.01 78
TV.SF11.HHE. 2020-03-09T18:17:22.34 0.1 undecidable manual P 162 0.1682 112 0.48 95
TV.SF04.EHZ. 2020-03-09T18:17:22.63 0.3 undecidable manual P 169 0.197 107 0.31 74
TV.SF13.HHE. 2020-03-09T18:17:22.79 0.1 undecidable manual P 178 0.2104 105 0.24 99
TV.SF01.EHZ. 2020-03-09T18:17:22.79 0.3 undecidable manual P 189 0.2194 104 0.1 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHE. ML:1.5 0.0002065 1.46 AML other m 2020-03-09T18:17:26.78
IV.ARCI.HHE. ML:1 5.3624315E-5 1.3056 AML other m 2020-03-09T18:17:26.30
IV.ARCI.HHN. ML:0.6 2.669915E-5 0.4608 AML other m 2020-03-09T18:17:26.32
TV.SF01.EHE. ML:1.3 0.00010268029 0.384 AML other m 2020-03-09T18:17:26.63
TV.SF01.EHN. ML:0.9 4.385958E-5 0.9984 AML other m 2020-03-09T18:17:26.55
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download