Earthquake with magnitude of ML 1.7 on date 28-10-2020 and time 02:48:29 (Italy) in region 2 km W Castiglione d'Orcia (SI)

A magnitude ML 1.7 earthquake occured in region: 2 km W Castiglione d'Orcia (SI), on

  • 28-10-2020 01:48:29 (UTC)
  • 28-10-2020 02:48:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43, 11.59 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 7 2662 5008
Seggiano GR 8 961 5969
Montalcino SI 11 5093 11062
Pienza SI 12 2107 13169
Castel del Piano GR 12 4690 17859
Arcidosso GR 15 4285 22144
Abbadia San Salvatore SI 15 6444 28588
San Giovanni d'Asso SI 17 853 29441
Buonconvento SI 18 3173 32614
Radicofani SI 18 1097 33711
Piancastagnaio SI 18 4230 37941
Santa Fiora GR 19 2622 40563
Montepulciano SI 19 14097 54660
Cinigiano GR 20 2618 57278

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)
77 Km NW of Viterbo (67173 inhabitants)
90 Km SE of Firenze (382808 inhabitants)
91 Km W of Foligno (57155 inhabitants)
91 Km SE of Scandicci (50609 inhabitants)
99 Km W 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 1.7 2020-10-28
01:48:29
43 11.59 11 2021-02-26
14:56:02
Bollettino Sismico Italiano INGV 84384461
Reviewed
Rev100
ML 1.7 2020-10-28
01:48:29
43.01 11.59 10 2020-10-28
02:18:46
Sala Sismica INGV-Roma 84193761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-28 01:48:29 ± 0.09
Latitude 43.00 ± 0.00
Longitude 11.59 ± 0.01
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 84384461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 499
Semi-minor axis of confidence ellipse (meter) 418
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 263
Circular confidence region, given by single value of horizontal uncertainty (meter) 500
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.14479
Epicentral distance of station farthest from the epicenter (degree) 0.95868
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 84384461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-11 12:15:40

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 84193761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-28 02:18:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATMI.HHZ. 2020-10-28T01:48:50.03 0.3 undecidable manual S 56 0.5971 50 0.2 67
IV.CASP.HHZ. 2020-10-28T01:48:49.91 0.6 undecidable manual S 249 0.5702 50 0.89 37
IV.PE3.EHZ. 2020-10-28T01:48:47.95 0.3 undecidable manual P 43 0.9587 50 0.47 58
IV.PARC.HHZ. 2020-10-28T01:48:44.81 0.3 undecidable manual P 36 0.8031 50 0 66
IV.ATVO.HHZ. 2020-10-28T01:48:43.39 0.3 undecidable manual P 57 0.7078 50 0.21 65
IV.RIBO.EHZ.01 2020-10-28T01:48:43.56 0.3 undecidable manual S 263 0.4002 50 -0.44 64
IV.MGAB.HHZ. 2020-10-28T01:48:43.35 0.3 undecidable manual S 102 0.3912 50 -0.37 67
IV.MURB.HHZ. 2020-10-28T01:48:43.82 0.3 undecidable manual P 68 0.7311 50 0.24 64
IV.FROS.CHZ. 2020-10-28T01:48:42.79 0.1 undecidable manual S 304 0.3804 50 -0.62 80
IV.CRE.HHZ. 2020-10-28T01:48:42.80 0.1 undecidable manual P 23 0.6736 50 0.21 88
IV.ATMI.HHZ. 2020-10-28T01:48:41.17 0.3 undecidable manual P 56 0.5971 50 -0.12 68
IV.CASP.HHZ. 2020-10-28T01:48:41.61 0.1 undecidable manual P 249 0.5702 50 0.79 76
IV.CSNT.HHZ. 2020-10-28T01:48:39.34 0.1 undecidable manual P 335 0.5225 50 -0.67 78
IV.CAFI.HHZ. 2020-10-28T01:48:38.05 0.1 undecidable manual P 40 0.4299 50 -0.37 89
TV.SF14.HHN. 2020-10-28T01:48:38.92 0.6 undecidable manual S 176 0.2437 50 -0.43 45
IV.RIBO.EHZ.01 2020-10-28T01:48:38.13 0.1 undecidable manual P 263 0.4002 50 0.2 94
IV.MCIV.CHZ. 2020-10-28T01:48:38.57 0.6 undecidable manual S 164 0.2284 50 -0.33 46
TV.SF13.HHE. 2020-10-28T01:48:37.27 0.1 undecidable manual S 173 0.1808 50 -0.23 96
TV.SF01.EHZ. 2020-10-28T01:48:37.62 0.6 undecidable manual S 186 0.1871 50 -0.06 49
TV.SF03.EHN. 2020-10-28T01:48:37.93 0.6 undecidable manual S 160 0.2077 50 -0.35 46
IV.ARCI.HHZ. 2020-10-28T01:48:37.39 0.6 undecidable manual S 210 0.1691 50 0.26 48
IV.FROS.CHZ. 2020-10-28T01:48:37.40 0.1 undecidable manual P 304 0.3804 50 -0.18 92
IV.MGAB.HHZ. 2020-10-28T01:48:37.73 0.1 undecidable manual P 102 0.3912 50 -0.03 96
TV.SF04.EHZ. 2020-10-28T01:48:36.86 0.1 undecidable manual S 162 0.1709 50 -0.32 95
IV.SACS.HHZ. 2020-10-28T01:48:36.18 0.1 undecidable manual P 122 0.277 50 0.37 91
TV.SF11.HHZ. 2020-10-28T01:48:36.03 0.3 undecidable manual S 153 0.1448 124 -0.33 72
IV.MCIV.CHZ. 2020-10-28T01:48:35.19 0.1 undecidable manual P 164 0.2284 50 0.21 96
TV.SF14.HHN. 2020-10-28T01:48:35.43 0.3 undecidable manual P 176 0.2437 50 0.19 72
TV.SF04.EHZ. 2020-10-28T01:48:34.14 0.1 undecidable manual P 162 0.1709 50 0.15 97
TV.SF13.HHE. 2020-10-28T01:48:34.38 0.1 positive manual P 173 0.1808 50 0.21 96
IV.ARCI.HHZ. 2020-10-28T01:48:34.00 0.1 positive manual P 210 0.1691 50 0.04 100
TV.SF03.EHN. 2020-10-28T01:48:34.79 0.3 undecidable manual P 160 0.2077 50 0.17 73
TV.SF01.EHZ. 2020-10-28T01:48:34.39 0.1 undecidable manual P 186 0.1871 50 0.11 99
TV.SF11.HHZ. 2020-10-28T01:48:33.66 0.1 undecidable manual P 153 0.1448 124 0.15 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHN. ML:2.2 0.00134 0.18 AML other m 2020-10-28T01:48:37.84
TV.SF04.EHE. ML:2.3 0.00161 1.82 AML other m 2020-10-28T01:48:38.99
IV.ARCI.HHN. ML:1.6 0.0003195 0.4 AML other m 2020-10-28T01:48:38.55
TV.SF01.EHE. ML:2.1 0.000824 0.24 AML other m 2020-10-28T01:48:38.64
TV.SF01.EHN. ML:2.4 0.001745 0.24 AML other m 2020-10-28T01:48:38.51
IV.ARCI.HHE. ML:1.7 0.0003535 0.28 AML other m 2020-10-28T01:48:39.30
IV.MCIV.CHN. ML:1.7 0.0002765 0.84 AML other m 2020-10-28T01:48:40.25
IV.MCIV.CHE. ML:1.7 0.000259 0.7 AML other m 2020-10-28T01:48:41.54
IV.SACS.HHN. ML:1.2 7.575E-5 1.2 AML other m 2020-10-28T01:48:43.08
IV.SACS.HHE. ML:1.2 7.37E-5 1.4 AML other m 2020-10-28T01:48:44.77
IV.FROS.CHN. ML:1.7 0.000154 1.42 AML other m 2020-10-28T01:48:46.81
IV.MGAB.HHE. ML:1.5 9.205E-5 0.52 AML other m 2020-10-28T01:48:47.34
IV.MGAB.HHN. ML:1.5 9.115E-5 0.16 AML other m 2020-10-28T01:48:47.21
IV.CSNT.HHN. ML:1.6 7.935E-5 1.84 AML other m 2020-10-28T01:48:47.05
IV.CSNT.HHE. ML:1.5 6.705E-5 0.8 AML other m 2020-10-28T01:48:48.71
IV.CAFI.HHN. ML:1.2 4.38E-5 0.9 AML other m 2020-10-28T01:48:48.40
IV.FROS.CHE. ML:1.8 0.000192 1.06 AML other m 2020-10-28T01:48:49.31
IV.CAFI.HHE. ML:1.2 4.66E-5 0.64 AML other m 2020-10-28T01:48:49.62
IV.CASP.HHE. ML:1.7 9.565E-5 0.8 AML other m 2020-10-28T01:48:50.38
IV.CASP.HHN. ML:1.6 8.265E-5 0.22 AML other m 2020-10-28T01:48:52.28
IV.ATMI.HHE. ML:2 0.0002005 0.26 AML other m 2020-10-28T01:48:52.43
IV.ATMI.HHN. ML:2 0.0001985 0.3 AML other m 2020-10-28T01:48:55.78
IV.MURB.HHE. ML:2.2 0.000213 0.24 AML other m 2020-10-28T01:48:56.96
IV.ATVO.HHE. ML:1.7 7.065E-5 0.38 AML other m 2020-10-28T01:48:57.87
IV.MURB.HHN. ML:2.6 0.0005085 0.26 AML other m 2020-10-28T01:48:58.64
IV.ATVO.HHN. ML:1.4 4.195E-5 0.72 AML other m 2020-10-28T01:48:58.39
IV.CESX.HHN. ML:0 8.965E-5 0.24 AML other m 2020-10-28T01:49:02.52
IV.CESX.HHE. ML:0 7.235E-5 0.24 AML other m 2020-10-28T01:49:02.88
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