Earthquake with magnitude of ML 1.3 on date 30-10-2020 and time 06:21:08 (Italy) in region 3 km SW San Quirico d'Orcia (SI)

A magnitude ML 1.3 earthquake occured in region: 3 km SW San Quirico d'Orcia (SI), on

  • 30-10-2020 05:21:08 (UTC)
  • 30-10-2020 06:21:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.03, 11.59 at 8 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
San Quirico d'Orcia SI 3 2662 2662
Castiglione d'Orcia SI 4 2346 5008
Montalcino SI 9 5093 10101
Pienza SI 9 2107 12208
Seggiano GR 12 961 13169
San Giovanni d'Asso SI 13 853 14022
Buonconvento SI 15 3173 17195
Castel del Piano GR 16 4690 21885
Montepulciano SI 17 14097 35982
Abbadia San Salvatore SI 18 6444 42426
Arcidosso GR 18 4285 46711
Trequanda SI 19 1254 47965

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Siena (53903 inhabitants)
49 Km NE of Grosseto (82087 inhabitants)
54 Km SW of Arezzo (99543 inhabitants)
66 Km W of Perugia (166134 inhabitants)
80 Km NW of Viterbo (67173 inhabitants)
86 Km SE of Firenze (382808 inhabitants)
87 Km SE of Scandicci (50609 inhabitants)
91 Km W of Foligno (57155 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 1.3 2020-10-30
05:21:08
43.03 11.59 8 2020-10-30
05:27:39
Sala Sismica INGV-Roma 84253471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-30 05:21:08 ± 0.22
Latitude 43.03 ± 0.01
Longitude 11.59 ± 0.01
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84253471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1539
Semi-minor axis of confidence ellipse (meter) 830
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 153
Circular confidence region, given by single value of horizontal uncertainty (meter) 1540
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.58276
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 84253471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-30 05:27:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CASP.HHZ. 2020-10-30T05:21:28.86 0.3 undecidable manual S 246 0.5828 50 0.02 70
IV.CSNT.HHZ. 2020-10-30T05:21:25.59 0.6 undecidable manual S 334 0.4901 50 -0.52 43
IV.RIBO.EHZ.01 2020-10-30T05:21:23.23 1.0 undecidable manual S 258 0.4056 50 -0.36 23
IV.CAFI.HHZ. 2020-10-30T05:21:22.80 0.3 undecidable manual S 43 0.4038 50 -0.74 60
IV.SACS.HHZ. 2020-10-30T05:21:20.71 1.0 undecidable manual S 128 0.2986 103 0.53 22
IV.CASP.HHZ. 2020-10-30T05:21:20.78 0.1 undecidable manual P 246 0.5828 50 0.58 82
IV.CSNT.HHZ. 2020-10-30T05:21:18.48 0.1 undecidable manual P 334 0.4901 50 -0.14 93
IV.CAFI.HHZ. 2020-10-30T05:21:17.26 0.1 undecidable manual P 43 0.4038 50 0.12 95
IV.MGAB.HHZ. 2020-10-30T05:21:17.57 0.6 positive manual P -0.01 0.84
IV.RIBO.EHZ.01 2020-10-30T05:21:17.32 0.1 undecidable manual P 258 0.4056 50 0.16 95
TV.SF01.EHZ. 2020-10-30T05:21:16.61 0.3 undecidable manual S 185 0.2221 107 -0.74 62
IV.ARCI.HHZ. 2020-10-30T05:21:16.51 0.6 undecidable manual S 205 0.1996 109 -0.02 51
TV.SF04.EHZ. 2020-10-30T05:21:16.06 0.1 undecidable manual S 165 0.2041 109 -0.64 86
IV.SACS.HHZ. 2020-10-30T05:21:15.71 0.1 undecidable manual P 128 0.2986 103 0.51 89
TV.SF04.EHZ. 2020-10-30T05:21:13.42 0.1 undecidable manual P 165 0.2041 109 0.23 97
TV.SF01.EHZ. 2020-10-30T05:21:13.62 0.1 undecidable manual P 185 0.2221 107 0.06 100
IV.ARCI.HHZ. 2020-10-30T05:21:13.17 0.1 undecidable manual P 205 0.1996 109 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAFI.HHN. ML:0 2.2939735E-5 0.32 AML other m 2020-10-30T05:21:26.66
IV.CAFI.HHE. ML:0 1.7652755E-5 0.9184 AML other m 2020-10-30T05:21:28.55
IV.ARCI.HHE. ML:1.2 0.00011561241 0.3392 AML other m 2020-10-30T05:21:18.49
IV.ARCI.HHN. ML:1.2 9.8839815E-5 0.5824 AML other m 2020-10-30T05:21:17.45
TV.SF04.EHE. ML:2 0.0006353539 0.16 AML other m 2020-10-30T05:21:17.07
TV.SF04.EHN. ML:2 0.00067243125 0.1984 AML other m 2020-10-30T05:21:16.29
IV.SACS.HNE. ML:1.5 0.00014318055 2.7392 AML other m 2020-10-30T05:21:18.27
IV.SACS.HNN. ML:1.6 0.0001572104 2.3008 AML other m 2020-10-30T05:21:26.82
IV.SACS.HHE. ML:0.8 2.951463E-5 2.7008 AML other m 2020-10-30T05:21:31.90
IV.SACS.HHN. ML:0.8 2.328623E-5 0.64 AML other m 2020-10-30T05:21:23.63
IV.CAFI.HNE. ML:1.7 0.0001446891 2.528 AML other m 2020-10-30T05:21:29.61
IV.CAFI.HNN. ML:1.6 0.00012065585 1.6288 AML other m 2020-10-30T05:21:25.47
IV.RIBO.EHE.01 ML:1.8 0.0001771373 0.2784 AML other m 2020-10-30T05:21:24.37
IV.MGAB.HNN. ML:1.7 0.0001500248 1.6192 AML other m 2020-10-30T05:21:38.40
IV.MGAB.HHE. ML:1.1 4.075545E-5 0.4576 AML other m 2020-10-30T05:21:25.51
IV.MGAB.HHN. ML:1.1 3.745307E-5 0.4192 AML other m 2020-10-30T05:21:27.64
IV.MGAB.HNE. ML:1.6 0.00012207546 1.4016 AML other m 2020-10-30T05:21:28.68
IV.CSNT.HHN. ML:1.2 3.979917E-5 0.1408 AML other m 2020-10-30T05:21:27.20
IV.CSNT.HHE. ML:1 2.733219E-5 1.1808 AML other m 2020-10-30T05:21:28.76
IV.CASP.HHN. ML:1.2 2.9358475E-5 0.2176 AML other m 2020-10-30T05:21:31.45
IV.CASP.HHE. ML:1.2 2.867567E-5 0.3616 AML other m 2020-10-30T05:21:29.68
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