Earthquake with magnitude of ML 2.4 on date 28-10-2020 and time 02:31:20 (UTC) in region 3 km W Castiglione d'Orcia (SI)

A magnitude ML 2.4 earthquake occured in region: 3 km W Castiglione d'Orcia (SI), on

  • 28-10-2020 02:31:20 (UTC)
  • 28-10-2020 03:31:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9960, 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 3 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 14 4285 22144
Abbadia San Salvatore SI 15 6444 28588
San Giovanni d'Asso SI 18 853 29441
Buonconvento SI 18 3173 32614
Radicofani SI 18 1097 33711
Santa Fiora GR 18 2622 36333
Piancastagnaio SI 18 4230 40563
Montepulciano SI 19 14097 54660
Cinigiano GR 20 2618 57278

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km SE of Siena (53903 inhabitants)
47 Km NE of Grosseto (82087 inhabitants)
58 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 2.4 2020-10-28
02:31:20
42.9958 11.5887 11 2021-02-26
14:56:02
Bollettino Sismico Italiano INGV 84392041
Reviewed
Rev100
ML 2.4 2020-10-28
02:31:20
43.0052 11.5997 11 2020-10-28
02:40:15
Sala Sismica INGV-Roma 84194321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-28 02:31:20 ± 0.05
Latitude 42.9958 ± 0.0036
Longitude 11.5887 ± 0.0049
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84392041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 900
Semi-minor axis of confidence ellipse (meter) 620
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 315
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 38
Number of associated phases, regardless of their use for origin computation 72
Number of defining phases 67
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.20689
Number of stations at which the event was observed 49
Number of stations from which data was used for origin computation 44
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 78
Type of magnitude ML
Reference to an origin 84392041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-11 12:37:26

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 78
Type of magnitude ML
Reference to an origin 84194321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-28 02:40:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.MOSI.HHZ. 2020-10-28T02:33:08.75 3.0 undecidable manual Sg 7.38 0
IV.CTI.HHZ. 2020-10-28T02:32:45.69 3.0 undecidable manual Sn -0.01 0
IV.VENL.HNZ. 2020-10-28T02:32:34.21 3.0 undecidable manual Sn 2.27 0
IV.SGG.HHZ. 2020-10-28T02:32:13.29 3.0 undecidable manual Pg 9.84 0
IV.PTRJ.HNZ. 2020-10-28T02:32:08.61 3.0 undecidable manual Pn 3.76 0
IV.MURB.HHZ. 2020-10-28T02:31:46.15 0.3 undecidable manual S 68 81.3519 90 1.05 48
IV.ATPI.EHZ. 2020-10-28T02:31:45.99 0.6 undecidable manual S 52 82.8504 90 0.5 40
IV.SSP9.EHZ. 2020-10-28T02:31:44.44 0.3 undecidable manual S 34 77.6667 90 0.34 64
IV.COR1.EHZ. 2020-10-28T02:31:44.01 0.3 undecidable manual P 58 133.9659 90 1.04 44
IV.ATVO.HHZ. 2020-10-28T02:31:44.01 0.6 undecidable manual S 57 78.8655 90 -0.41 41
IV.BADI.EHZ. 2020-10-28T02:31:44.30 0.3 undecidable manual S 43 77.7666 90 0.15 66
IV.CSP1.EHZ. 2020-10-28T02:31:43.09 0.3 undecidable manual P 85 131.4684 90 0.48 54
IV.CRE.HHZ. 2020-10-28T02:31:43.45 0.6 undecidable manual S 23 75.0693 90 0.04 44
IV.EL6.EHZ. 2020-10-28T02:31:42.47 0.3 undecidable manual P 73 127.872 90 0.41 56
IV.ATMI.HHZ. 2020-10-28T02:31:41.29 0.6 undecidable manual S 55 66.5778 90 0.14 45
IV.FDMO.HHZ. 2020-10-28T02:31:41.46 0.3 undecidable manual P 87 121.5894 90 0.36 57
IV.ARVD.HHZ. 2020-10-28T02:31:41.88 0.3 undecidable manual P 63 122.6883 90 0.65 53
IV.MPAG.EHZ. 2020-10-28T02:31:40.80 0.3 undecidable manual P 53 117.7932 90 0.33 58
IV.CASP.HHZ. 2020-10-28T02:31:40.80 0.3 undecidable manual S 249 63.0924 90 0.59 59
IV.PE3.EHZ. 2020-10-28T02:31:39.09 0.6 undecidable manual P 43 106.7154 90 0.3 40
IV.SSFR.HHZ. 2020-10-28T02:31:39.74 0.6 undecidable manual P 63 108.114 90 0.72 35
IV.CPGN.EHZ. 2020-10-28T02:31:39.65 0.6 undecidable manual P 33 107.0151 90 0.83 34
IV.NARO.HHZ. 2020-10-28T02:31:38.56 0.3 undecidable manual P 49 105.2169 90 0.02 63
IV.RINC.HHZ. 2020-10-28T02:31:37.85 0.1 undecidable manual P 1 98.8233 90 0.29 82
IV.CSNT.HHZ. 2020-10-28T02:31:37.77 0.3 undecidable manual S 336 58.1973 90 -1.14 46
IV.FOSV.EHZ. 2020-10-28T02:31:37.78 0.3 undecidable manual P 70 100.5216 90 -0.05 63
IV.TRIF.CHZ. 2020-10-28T02:31:37.92 0.6 undecidable manual S 284 57.1983 90 -0.72 38
IV.PARC.HHZ. 2020-10-28T02:31:36.00 0.3 undecidable manual P 36 89.4438 90 -0.12 64
IV.APEC.HHZ. 2020-10-28T02:31:36.48 0.3 undecidable manual P 47 91.6416 90 0.01 65
IV.RUFI.EHE. 2020-10-28T02:31:36.67 0.6 undecidable manual P 356 93.6396 90 -0.1 42
IV.MAGO.CHZ. 2020-10-28T02:31:35.52 0.6 undecidable manual P 293 81.3519 90 0.64 38
IV.ATFO.HHZ. 2020-10-28T02:31:35.90 0.6 undecidable manual P 62 89.5437 90 -0.24 42
IV.MOMA.HHZ. 2020-10-28T02:31:35.45 0.3 undecidable manual P 105 82.5507 90 0.4 61
IV.ATPI.EHZ. 2020-10-28T02:31:35.04 0.3 undecidable manual P 52 82.8504 90 -0.07 65
IV.ASSB.HHZ. 2020-10-28T02:31:35.78 0.3 undecidable manual P 86 86.9463 90 0.05 66
IV.ATCC.EHZ. 2020-10-28T02:31:35.82 0.3 undecidable manual P 76 87.7455 90 -0.03 65
IV.BADI.EHZ. 2020-10-28T02:31:34.21 0.1 undecidable manual P 43 77.7666 90 -0.12 87
IV.MURB.HHZ. 2020-10-28T02:31:34.71 0.3 undecidable manual P 68 81.3519 90 -0.17 64
IV.CAFI.HHZ. 2020-10-28T02:31:34.87 0.3 undecidable manual S 39 48.0186 90 -1.31 42
IV.SSP9.EHZ. 2020-10-28T02:31:34.36 0.3 undecidable manual P 34 77.6667 90 0.06 67
IV.MGAB.HHZ. 2020-10-28T02:31:34.92 0.6 undecidable manual S 102 43.5231 90 -0.07 47
IV.MAON.HHZ. 2020-10-28T02:31:34.20 0.1 undecidable manual P 211 73.1712 90 0.58 77
IV.ATVO.HHZ. 2020-10-28T02:31:34.44 0.1 undecidable manual P 57 78.8655 90 -0.05 88
IV.RIBO.EHZ. 2020-10-28T02:31:34.58 0.6 undecidable manual S 263 44.3223 90 -0.63 41
IV.CRE.HHZ. 2020-10-28T02:31:33.74 0.3 undecidable manual P 23 75.0693 90 -0.17 65
IV.FROS.CHZ. 2020-10-28T02:31:33.54 0.3 undecidable manual S 304 42.3243 90 -1.13 48
IV.ATMI.HHZ. 2020-10-28T02:31:32.51 0.1 undecidable manual P 55 66.5778 90 -0.09 89
IV.CASP.HHZ. 2020-10-28T02:31:32.58 0.1 positive manual P 249 63.0924 90 0.52 81
IV.TRIF.CHZ. 2020-10-28T02:31:31.34 0.1 undecidable manual P 284 57.1983 90 0.19 90
IV.SACS.HHZ. 2020-10-28T02:31:31.27 0.3 undecidable manual S 122 30.747 90 -0.31 69
TV.SF14.HHN. 2020-10-28T02:31:30.08 0.3 undecidable manual S 175 26.751 90 -0.45 69
IV.CSNT.HHZ. 2020-10-28T02:31:30.51 0.1 undecidable manual P 336 58.1973 90 -0.8 73
IV.RIBO.EHZ. 2020-10-28T02:31:29.24 0.1 undecidable manual P 263 44.3223 90 0.07 94
TV.SF03.EHN. 2020-10-28T02:31:29.13 0.3 undecidable manual S 160 22.8549 90 -0.34 71
IV.CAFI.HHZ. 2020-10-28T02:31:29.27 0.1 undecidable manual P 39 48.0186 90 -0.46 85
IV.MCIV.CHZ. 2020-10-28T02:31:29.65 0.3 undecidable manual S 163 25.1526 90 -0.44 69
TV.SF04.EHZ. 2020-10-28T02:31:28.04 0.3 undecidable manual S 162 18.6702 90 -0.33 71
IV.MGAB.HHZ. 2020-10-28T02:31:28.80 0.1 undecidable manual P 102 43.5231 90 -0.24 91
TV.SF13.HHN. 2020-10-28T02:31:28.34 0.1 undecidable manual S 173 19.869 90 -0.33 95
IV.FROS.CHZ. 2020-10-28T02:31:28.48 0.1 undecidable manual P 304 42.3243 90 -0.38 88
IV.ARCI.HHZ. 2020-10-28T02:31:28.67 0.3 undecidable manual S 210 18.4704 90 0.37 68
TV.SF01.EHZ. 2020-10-28T02:31:28.65 0.6 undecidable manual S 186 20.4684 90 -0.2 49
IV.SACS.HHZ. 2020-10-28T02:31:27.14 0.1 positive manual P 122 30.747 90 0.06 96
TV.SF11.HHZ. 2020-10-28T02:31:27.23 0.1 undecidable manual S 153 15.873 90 -0.39 94
TV.SF14.HHN. 2020-10-28T02:31:26.62 0.1 positive manual P 175 26.751 90 0.15 94
IV.MCIV.CHZ. 2020-10-28T02:31:26.37 0.1 positive manual P 163 25.1526 90 0.16 94
TV.SF03.EHN. 2020-10-28T02:31:26.02 0.1 positive manual P 160 22.8549 90 0.16 95
IV.ARCI.HHZ. 2020-10-28T02:31:25.09 0.1 positive manual P 210 18.4704 90 -0.09 99
TV.SF01.EHZ. 2020-10-28T02:31:25.59 0.1 positive manual P 186 20.4684 90 0.09 96
TV.SF04.EHZ. 2020-10-28T02:31:25.31 0.1 positive manual P 162 18.6702 90 0.09 97
TV.SF13.HHN. 2020-10-28T02:31:25.57 0.1 positive manual P 173 19.869 90 0.17 95
TV.SF11.HHZ. 2020-10-28T02:31:24.72 0.1 undecidable manual P 153 15.873 90 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHN. ML:3.2 0.01199 0.78 AML other m 2020-10-28T02:31:28.12
IV.ARCI.HHE. ML:2.4 0.001875 0.92 AML other m 2020-10-28T02:31:29.05
IV.ARCI.HHN. ML:2.4 0.0020499999999999997 0.32 AML other m 2020-10-28T02:31:29.69
TV.SF04.EHE. ML:3.1 0.0105 0.32 AML other m 2020-10-28T02:31:29.76
TV.SF01.EHN. ML:3.1 0.00879 0.24 AML other m 2020-10-28T02:31:29.66
TV.SF01.EHE. ML:2.8 0.00545 0.28 AML other m 2020-10-28T02:31:30.47
IV.MCIV.CHN. ML:2.6 0.00217 0.38 AML other m 2020-10-28T02:31:31.60
IV.MCIV.CHE. ML:2.5 0.0019950000000000002 0.66 AML other m 2020-10-28T02:31:32.37
IV.FROS.CHE. ML:2.7 0.001465 1.76 AML other m 2020-10-28T02:31:34.10
IV.SACS.HHE. ML:2.0 0.0005265 0.46 AML other m 2020-10-28T02:31:35.25
IV.CAFI.HHE. ML:2.4 0.0007070000000000001 0.32 AML other m 2020-10-28T02:31:35.65
IV.CAFI.HNE. ML:2.5 0.0008629999999999999 0.3 AML other m 2020-10-28T02:31:35.98
IV.CAFI.HHN. ML:2.5 0.0008715 0.28 AML other m 2020-10-28T02:31:35.97
IV.CAFI.HNN. ML:2.3 0.000619 0.28 AML other m 2020-10-28T02:31:36.40
IV.SACS.HHN. ML:2.1 0.0005475000000000001 0.58 AML other m 2020-10-28T02:31:37.41
IV.MGAB.HHE. ML:2.4 0.000828 0.78 AML other m 2020-10-28T02:31:37.52
IV.MGAB.HNE. ML:2.4 0.000753 0.8 AML other m 2020-10-28T02:31:37.51
IV.FROS.CHN. ML:2.6 0.0012050000000000001 0.44 AML other m 2020-10-28T02:31:38.22
IV.TRIF.CHE. ML:2.4 0.0005755000000000001 0.3 AML other m 2020-10-28T02:31:39.54
IV.CSNT.HHE. ML:2.3 0.00038449999999999997 1.02 AML other m 2020-10-28T02:31:40.01
IV.CSNT.HHN. ML:2.3 0.0004355 1.78 AML other m 2020-10-28T02:31:40.03
IV.MGAB.HHN. ML:2.4 0.000782 0.26 AML other m 2020-10-28T02:31:40.61
IV.MGAB.HNN. ML:2.4 0.000798 0.26 AML other m 2020-10-28T02:31:40.61
IV.CASP.HHE. ML:2.4 0.0004885 0.82 AML other m 2020-10-28T02:31:41.58
IV.CASP.HHN. ML:2.4 0.0005195 0.32 AML other m 2020-10-28T02:31:43.44
IV.TRIF.CHN. ML:2.4 0.0005755000000000001 1.4 AML other m 2020-10-28T02:31:43.00
IV.CRE.HHN. ML:2.6 0.0006699999999999999 0.24 AML other m 2020-10-28T02:31:44.40
IV.ATMI.HHN. ML:3.0 0.00171 0.5 AML other m 2020-10-28T02:31:45.72
IV.CRE.HHE. ML:2.5 0.000505 0.28 AML other m 2020-10-28T02:31:46.16
IV.ATMI.HHE. ML:2.9 0.00145 1.36 AML other m 2020-10-28T02:31:46.30
IV.MAON.HHN. ML:2.3 0.0003035 1.36 AML other m 2020-10-28T02:31:47.22
IV.BADI.EHN. ML:2.3 0.00027749999999999997 1.22 AML other m 2020-10-28T02:31:47.65
IV.MAON.HHE. ML:2.2 0.000249 0.96 AML other m 2020-10-28T02:31:47.37
IV.BADI.EHE. ML:2.4 0.00038700000000000003 0.98 AML other m 2020-10-28T02:31:47.89
IV.ATVO.HHE. ML:2.6 0.000584 1.6 AML other m 2020-10-28T02:31:48.09
IV.MURB.HHN. ML:3.6 0.005105 0.26 AML other m 2020-10-28T02:31:49.84
IV.MAGO.CHE. ML:1.9 0.00010954999999999999 0.4 AML other m 2020-10-28T02:31:49.71
IV.MURB.HNN. ML:3.5 0.004425 0.26 AML other m 2020-10-28T02:31:49.84
IV.MAGO.CHN. ML:2.0 0.000127 0.4 AML other m 2020-10-28T02:31:49.79
IV.MURB.HHE. ML:3.2 0.001935 0.22 AML other m 2020-10-28T02:31:49.81
IV.MURB.HNE. ML:3.3 0.0024850000000000002 0.24 AML other m 2020-10-28T02:31:49.82
IV.ATVO.HHN. ML:2.4 0.0003195 0.84 AML other m 2020-10-28T02:31:49.52
IV.SSP9.EHE. ML:2.5 0.0005434999999999999 0.56 AML other m 2020-10-28T02:31:50.29
IV.ATPI.EHE. ML:2.4 0.00035499999999999996 0.5 AML other m 2020-10-28T02:31:50.60
IV.ASSB.HHN. ML:2.2 0.00019700000000000002 0.4 AML other m 2020-10-28T02:31:51.05
IV.ATPI.EHN. ML:2.4 0.000365 0.5 AML other m 2020-10-28T02:31:51.25
IV.ATCC.EHE. ML:2.7 0.000648 0.54 AML other m 2020-10-28T02:31:51.52
IV.PARC.HHE. ML:2.2 0.00020600000000000002 0.3 AML other m 2020-10-28T02:31:51.53
IV.ATFO.HHN. ML:2.5 0.00038250000000000003 1.66 AML other m 2020-10-28T02:31:52.12
IV.ATCC.EHN. ML:2.6 0.0005434999999999999 0.4 AML other m 2020-10-28T02:31:52.38
IV.ASSB.HHE. ML:2.2 0.000203 0.8 AML other m 2020-10-28T02:31:52.01
IV.ATFO.HHE. ML:2.7 0.0005945 0.42 AML other m 2020-10-28T02:31:52.40
IV.FOSV.EHN. ML:2.1 0.0001192 0.64 AML other m 2020-10-28T02:31:52.67
IV.PARC.HHN. ML:2.4 0.00026700000000000004 1.4 AML other m 2020-10-28T02:31:52.90
IV.APEC.HHN. ML:2.4 0.00029200000000000005 0.3 AML other m 2020-10-28T02:31:52.83
IV.MOMA.HHN. ML:2.2 0.000231 1.72 AML other m 2020-10-28T02:31:53.87
IV.APEC.HHE. ML:2.5 0.00036199999999999996 0.38 AML other m 2020-10-28T02:31:53.62
IV.SSP9.EHN. ML:2.4 0.00032250000000000003 0.74 AML other m 2020-10-28T02:31:53.53
IV.SSFR.HNN. ML:2.5 0.0002695 0.74 AML other m 2020-10-28T02:31:54.13
IV.MOMA.HHE. ML:2.3 0.00025550000000000003 0.3 AML other m 2020-10-28T02:31:54.69
IV.NARO.HHE. ML:2.0 0.00008625 1.3 AML other m 2020-10-28T02:31:55.88
IV.FOSV.EHE. ML:2.2 0.000147 0.88 AML other m 2020-10-28T02:31:55.89
IV.PE3.EHE. ML:2.8 0.000572 0.74 AML other m 2020-10-28T02:31:57.00
IV.SSFR.HHN. ML:2.5 0.000286 0.26 AML other m 2020-10-28T02:31:57.32
IV.SSFR.HHE. ML:2.5 0.000261 0.24 AML other m 2020-10-28T02:31:58.55
IV.NARO.HHN. ML:2.0 0.00009379999999999999 0.94 AML other m 2020-10-28T02:31:58.53
IV.SSFR.HNE. ML:2.5 0.000275 1.02 AML other m 2020-10-28T02:31:59.52
IV.PE3.EHN. ML:2.8 0.000499 1.58 AML other m 2020-10-28T02:32:00.91
IV.EL6.EHN. ML:2.4 0.0001696 0.9 AML other m 2020-10-28T02:32:01.53
IV.MPAG.EHN. ML:2.1 0.00010155 0.42 AML other m 2020-10-28T02:32:02.09
IV.FDMO.HHN. ML:2.1 0.0000969 0.92 AML other m 2020-10-28T02:32:02.84
IV.MPAG.EHE. ML:2.1 0.0000875 1.02 AML other m 2020-10-28T02:32:02.98
IV.ARVD.HHN. ML:2.0 0.00007285 0.9 AML other m 2020-10-28T02:32:03.37
IV.EL6.EHE. ML:2.4 0.00017649999999999998 0.66 AML other m 2020-10-28T02:32:04.92
IV.ARVD.HHE. ML:2.1 0.0000956 1.28 AML other m 2020-10-28T02:32:05.00
IV.FDMO.HHE. ML:2.1 0.00008255 0.52 AML other m 2020-10-28T02:32:05.04
IV.CSP1.EHE. ML:2.5 0.0002085 1.22 AML other m 2020-10-28T02:32:05.95
IV.CSP1.EHN. ML:2.7 0.00033099999999999997 0.66 AML other m 2020-10-28T02:32:05.83
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
Waveforms Seismic signals in miniseed + resp format Download