Earthquake with magnitude of ML 2.1 on date 27-10-2020 and time 20:11:48 (UTC) in region 2 km W Castiglione d'Orcia (SI)

A magnitude ML 2.1 earthquake occured in region: 2 km W Castiglione d'Orcia (SI), on

  • 27-10-2020 20:11:48 (UTC)
  • 27-10-2020 21:11:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0060, 11.5890 at 11 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
Castiglione d'Orcia SI 2 2346 2346
San Quirico d'Orcia SI 6 2662 5008
Seggiano GR 9 961 5969
Montalcino SI 10 5093 11062
Pienza SI 11 2107 13169
Castel del Piano GR 13 4690 17859
Arcidosso GR 15 4285 22144
Abbadia San Salvatore SI 16 6444 28588
San Giovanni d'Asso SI 17 853 29441
Buonconvento SI 17 3173 32614
Montepulciano SI 19 14097 46711
Radicofani SI 19 1097 47808
Piancastagnaio SI 19 4230 52038
Santa Fiora GR 19 2622 54660

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km SE of Siena (53903 inhabitants)
47 Km NE of Grosseto (82087 inhabitants)
57 Km SW of Arezzo (99543 inhabitants)
66 Km W of Perugia (166134 inhabitants)
78 Km NW of Viterbo (67173 inhabitants)
89 Km SE of Firenze (382808 inhabitants)
90 Km SE of Scandicci (50609 inhabitants)
91 Km W of Foligno (57155 inhabitants)
100 Km NW of Terni (111501 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 2.1 2020-10-27
20:11:48
43.0058 11.5888 11 2021-02-26
14:56:08
Bollettino Sismico Italiano INGV 85052921
Reviewed
Rev100
ML 2.1 2020-10-27
20:11:48
43.0078 11.5958 11 2020-10-27
20:18:36
Sala Sismica INGV-Roma 84189971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-27 20:11:48 ± 0.08
Latitude 43.0058 ± 0.0027
Longitude 11.5888 ± 0.0049
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85052921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 418
Semi-minor axis of confidence ellipse (meter) 203
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 279
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
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) 0.15199
Epicentral distance of station farthest from the epicenter (degree) 0.83367
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 84189971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-27 20:18:36

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 85052921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-27 16:00:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2020-10-27T20:12:10.16 0.6 undecidable manual S 23 74.0703 50 -0.45 41
IV.ATMC.EHE. 2020-10-27T20:12:09.31 0.6 undecidable manual S 45 69.0753 50 0.02 46
IV.ATMI.HHZ. 2020-10-27T20:12:08.82 0.6 undecidable manual S 56 65.8896 50 0.38 43
IV.CASP.HHZ. 2020-10-27T20:12:07.64 0.6 undecidable manual S 248 63.492 50 -0.14 45
IV.ATVA.EHE. 2020-10-27T20:12:07.94 0.3 undecidable manual S 62 63.9915 50 0.02 70
IV.CSNT.HHZ. 2020-10-27T20:12:05.98 0.6 undecidable manual S 335 57.1983 50 -0.13 45
IV.ASQU.HHE. 2020-10-27T20:12:03.76 0.1 undecidable manual P 10 89.244 50 0.24 84
IV.RUFI.EHE. 2020-10-27T20:12:03.60 0.3 undecidable manual P 356 92.5407 50 -0.43 60
IV.PARC.HHZ. 2020-10-27T20:12:03.51 0.1 negative manual P 36 88.5447 50 0.09 87
IV.MOMA.HHZ. 2020-10-27T20:12:03.19 0.1 undecidable manual P 105 82.8504 50 0.65 76
IV.MGAB.HHZ. 2020-10-27T20:12:02.00 0.6 undecidable manual S 103 43.7229 50 -0.51 43
IV.ATPI.EHZ. 2020-10-27T20:12:02.57 0.3 undecidable manual P 53 82.1511 50 0.13 66
IV.ATVO.HHZ. 2020-10-27T20:12:02.00 0.1 undecidable manual P 57 78.1662 50 0.17 87
IV.RIBO.EHZ. 2020-10-27T20:12:02.48 0.6 undecidable manual S 262 44.4222 50 -0.24 46
IV.MURB.HHZ. 2020-10-27T20:12:02.36 0.3 undecidable manual P 69 80.9523 50 0.11 66
IV.CRE.HHZ. 2020-10-27T20:12:01.47 0.1 undecidable manual P 23 74.0703 50 0.28 86
IV.SSP9.EHZ. 2020-10-27T20:12:01.82 0.6 undecidable manual P 35 76.7676 50 0.22 43
IV.BADI.EHZ. 2020-10-27T20:12:01.54 0.3 undecidable manual P 43 76.9674 50 -0.1 66
IV.ATMI.HHZ. 2020-10-27T20:12:00.29 0.6 undecidable manual P 56 65.8896 50 0.36 43
IV.ATMC.EHE. 2020-10-27T20:12:00.29 0.1 undecidable manual P 45 69.0753 50 -0.14 89
IV.SACS.HHZ. 2020-10-27T20:11:59.62 0.6 undecidable manual S 124 31.3464 50 0.41 45
IV.CASP.HHZ. 2020-10-27T20:11:59.89 0.1 undecidable manual P 248 63.492 50 0.34 87
IV.ATVA.EHE. 2020-10-27T20:11:59.07 0.3 undecidable manual P 62 63.9915 50 -0.56 61
IV.TRIF.CHZ. 2020-10-27T20:11:58.91 0.3 undecidable manual P 282 56.8986 50 0.36 66
IV.MCIV.CHZ. 2020-10-27T20:11:57.29 0.6 undecidable manual S 164 26.1516 50 -0.55 44
TV.SF01.EHZ. 2020-10-27T20:11:57.04 0.3 undecidable manual S 186 21.5673 50 0.43 69
TV.SF14.HHZ. 2020-10-27T20:11:57.62 0.6 undecidable manual S 176 27.8499 50 -0.67 42
IV.CSNT.HHZ. 2020-10-27T20:11:57.90 0.1 undecidable manual P 335 57.1983 50 -0.69 78
TV.SF03.EHZ. 2020-10-27T20:11:56.76 0.3 undecidable manual S 161 23.8539 50 -0.45 68
IV.CAFI.HHZ. 2020-10-27T20:11:56.75 0.1 positive manual P 40 47.1195 50 -0.28 90
TV.SF13.HHZ. 2020-10-27T20:11:56.11 0.3 undecidable manual S 173 20.9679 50 -0.32 70
IV.MGAB.HHZ. 2020-10-27T20:11:56.36 0.1 undecidable manual P 103 43.7229 50 -0.15 93
IV.RIBO.EHZ. 2020-10-27T20:11:56.81 0.1 positive manual P 262 44.4222 50 0.19 93
IV.ARCI.HHZ. 2020-10-27T20:11:56.05 0.6 undecidable manual S 208 19.3695 119 0.04 50
TV.SF04.EHZ. 2020-10-27T20:11:55.75 0.3 undecidable manual S 163 19.7691 119 -0.36 70
IV.FROS.CHZ. 2020-10-27T20:11:55.97 0.1 undecidable manual P 303 41.7249 50 -0.23 92
TV.SF14.HHZ. 2020-10-27T20:11:54.27 0.1 positive manual P 176 27.8499 50 0.2 95
IV.SACS.HHZ. 2020-10-27T20:11:54.75 0.1 undecidable manual P 124 31.3464 50 0.15 96
TV.SF11.HHZ. 2020-10-27T20:11:54.94 0.3 undecidable manual S 154 16.872 122 -0.32 71
IV.MCIV.CHZ. 2020-10-27T20:11:54.02 0.1 positive manual P 164 26.1516 50 0.21 95
TV.SF01.EHZ. 2020-10-27T20:11:53.22 0.1 positive manual P 186 21.5673 50 0.12 98
TV.SF13.HHZ. 2020-10-27T20:11:53.19 0.1 positive manual P 173 20.9679 50 0.19 97
TV.SF03.EHZ. 2020-10-27T20:11:53.67 0.1 positive manual P 161 23.8539 50 0.22 95
TV.SF11.HHZ. 2020-10-27T20:11:52.35 0.1 positive manual P 154 16.872 122 0.03 100
IV.ARCI.HHZ. 2020-10-27T20:11:52.79 0.1 positive manual P 208 19.3695 119 0.03 100
TV.SF04.EHZ. 2020-10-27T20:11:52.97 0.1 positive manual P 163 19.7691 119 0.15 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHN. ML:2.7 0.003965 1.6 AML other m 2020-10-27T20:11:56.85
TV.SF04.EHE. ML:2.9 0.0055 0.18 AML other m 2020-10-27T20:11:57.17
IV.ARCI.HHN. ML:2.1 0.0009575 0.44 AML other m 2020-10-27T20:11:57.38
TV.SF01.EHE. ML:2.6 0.002895 0.22 AML other m 2020-10-27T20:11:57.35
TV.SF01.EHN. ML:2.8 0.004845 0.22 AML other m 2020-10-27T20:11:57.33
IV.ARCI.HHE. ML:2.2 0.001145 1.14 AML other m 2020-10-27T20:11:58.63
IV.MCIV.CHN. ML:2.2 0.0008215 0.5 AML other m 2020-10-27T20:11:58.48
IV.MCIV.CHE. ML:2.2 0.000992 0.66 AML other m 2020-10-27T20:11:59.97
IV.FROS.CHN. ML:2.1 0.000446 0.94 AML other m 2020-10-27T20:12:03.41
IV.MGAB.HHN. ML:2.0 0.000288 0.34 AML other m 2020-10-27T20:12:05.55
IV.MGAB.HHE. ML:2.0 0.0003035 0.38 AML other m 2020-10-27T20:12:05.56
IV.FROS.CHE. ML:2.2 0.0005484999999999999 1.64 AML other m 2020-10-27T20:12:05.89
IV.CSNT.HHE. ML:2.1 0.0002485 0.26 AML other m 2020-10-27T20:12:06.35
IV.SACS.HHE. ML:1.6 0.00020150000000000002 0.4 AML other m 2020-10-27T20:12:06.70
IV.SACS.HHN. ML:1.7 0.000231 0.84 AML other m 2020-10-27T20:12:07.03
IV.TRIF.CHN. ML:2.0 0.00023649999999999998 0.28 AML other m 2020-10-27T20:12:07.59
IV.CSNT.HHN. ML:1.9 0.000189 0.48 AML other m 2020-10-27T20:12:08.53
IV.TRIF.CHE. ML:2.2 0.00031800000000000003 1.74 AML other m 2020-10-27T20:12:09.12
IV.ATMI.HHE. ML:2.4 0.0005409999999999999 0.32 AML other m 2020-10-27T20:12:10.36
IV.CASP.HHN. ML:2.1 0.00022449999999999998 1.34 AML other m 2020-10-27T20:12:10.19
IV.CASP.HHE. ML:2.1 0.000255 0.36 AML other m 2020-10-27T20:12:11.19
IV.ATMI.HHN. ML:2.7 0.0008985000000000001 0.36 AML other m 2020-10-27T20:12:11.10
IV.CRE.HHN. ML:2.0 0.000153 1.06 AML other m 2020-10-27T20:12:12.25
IV.CRE.HHE. ML:2.1 0.0001965 0.82 AML other m 2020-10-27T20:12:14.55
IV.MURB.HHN. ML:3.0 0.00128 0.32 AML other m 2020-10-27T20:12:14.29
IV.MURB.HNN. ML:2.9 0.001145 0.32 AML other m 2020-10-27T20:12:14.14
IV.MURB.HHE. ML:2.7 0.0007965 0.28 AML other m 2020-10-27T20:12:15.36
IV.MURB.HNE. ML:2.7 0.0007655000000000001 0.28 AML other m 2020-10-27T20:12:15.51
IV.BADI.EHN. ML:1.9 0.0001205 1.44 AML other m 2020-10-27T20:12:16.14
IV.ATVO.HHE. ML:2.2 0.000247 0.36 AML other m 2020-10-27T20:12:16.30
IV.ATVO.HHN. ML:1.9 0.0001205 0.34 AML other m 2020-10-27T20:12:16.32
IV.BADI.EHE. ML:1.9 0.00011885000000000002 0.72 AML other m 2020-10-27T20:12:16.79
IV.MOMA.HHE. ML:1.9 0.00009465 1.46 AML other m 2020-10-27T20:12:17.18
IV.SSP9.EHE. ML:2.0 0.00014635 0.44 AML other m 2020-10-27T20:12:17.40
IV.ATPI.EHN. ML:2.1 0.00016450000000000001 0.36 AML other m 2020-10-27T20:12:17.69
IV.ATPI.EHE. ML:1.9 0.00010290000000000001 0.72 AML other m 2020-10-27T20:12:17.62
IV.SSP9.EHN. ML:2.0 0.000148 1.14 AML other m 2020-10-27T20:12:20.04
IV.PARC.HHN. ML:2.0 0.0001038 1.64 AML other m 2020-10-27T20:12:20.06
IV.PARC.HHE. ML:1.8 0.00008065 1.3 AML other m 2020-10-27T20:12:21.34
IV.MOMA.HHN. ML:1.7 0.00007175 0.36 AML other m 2020-10-27T20:12:23.62
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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