Earthquake with magnitude of ML 2.4 on date 27-10-2020 and time 10:42:16 (UTC) in region 2 km W Castiglione d'Orcia (SI)

A magnitude ML 2.4 earthquake occured in region: 2 km W Castiglione d'Orcia (SI), on

  • 27-10-2020 10:42:16 (UTC)
  • 27-10-2020 11:42:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9990, 11.5940 at 10 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 11 2107 13169
Castel del Piano GR 13 4690 17859
Abbadia San Salvatore SI 15 6444 24303
Arcidosso GR 15 4285 28588
San Giovanni d'Asso SI 17 853 29441
Buonconvento SI 18 3173 32614
Radicofani SI 18 1097 33711
Piancastagnaio SI 18 4230 37941
Montepulciano SI 19 14097 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)
77 Km NW of Viterbo (67173 inhabitants)
90 Km SE of Firenze (382808 inhabitants)
90 Km W of Foligno (57155 inhabitants)
91 Km SE of Scandicci (50609 inhabitants)
99 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 2.4 2020-10-27
10:42:16
42.9992 11.5943 10 2021-02-26
14:56:07
Bollettino Sismico Italiano INGV 84978951
Reviewed
Rev100
ML 2.4 2020-10-27
10:42:16
43.0002 11.5947 10 2020-10-27
10:57:57
Sala Sismica INGV-Roma 84178021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-27 10:42:16 ± 0.07
Latitude 42.9992 ± 0.0036
Longitude 11.5943 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84978951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 421
Semi-minor axis of confidence ellipse (meter) 403
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
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) 38
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 54
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.14479
Epicentral distance of station farthest from the epicenter (degree) 1.14753
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 36
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 62
Type of magnitude ML
Reference to an origin 84978951
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-24 09:04:04

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 60
Type of magnitude ML
Reference to an origin 84178021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-27 10:57:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2020-10-27T10:42:43.95 0.6 undecidable manual S 10 89.8434 50 0.37 41
IV.CRE.HHZ. 2020-10-27T10:42:39.50 0.6 undecidable manual S 23 74.5698 50 0.01 45
IV.ATMC.EHE. 2020-10-27T10:42:38.42 0.6 undecidable manual S 44 69.2751 50 0.32 43
IV.EL6.EHZ. 2020-10-27T10:42:38.75 0.6 undecidable manual P 73 127.3725 50 0.65 35
IV.CASP.HHZ. 2020-10-27T10:42:37.14 0.3 undecidable manual S 249 63.5919 50 0.56 61
IV.ATMI.HHZ. 2020-10-27T10:42:37.25 0.6 undecidable manual S 55 65.9895 50 0.05 46
IV.ATVA.EHE. 2020-10-27T10:42:36.64 0.6 undecidable manual S 61 63.8916 50 -0.02 46
IV.MPAG.EHZ. 2020-10-27T10:42:36.96 0.3 undecidable manual P 53 117.1938 50 0.43 57
IV.SSFR.HHZ. 2020-10-27T10:42:35.46 0.6 undecidable manual P 63 107.6145 50 0.41 39
IV.PE3.EHZ. 2020-10-27T10:42:35.19 0.3 undecidable manual P 43 106.116 50 0.36 59
IV.RINC.HHE. 2020-10-27T10:42:34.07 0.1 undecidable manual P 1 98.4237 50 0.43 79
IV.CSNT.HHZ. 2020-10-27T10:42:34.71 0.6 undecidable manual S 335 57.9975 50 -0.38 43
IV.APEC.HHZ. 2020-10-27T10:42:32.76 0.3 undecidable manual P 47 91.0422 50 0.25 62
IV.ASQU.HHZ. 2020-10-27T10:42:32.23 0.1 undecidable manual P 10 89.8434 50 -0.09 86
IV.ASSB.HHZ. 2020-10-27T10:42:32.34 0.3 undecidable manual P 86 86.4468 50 0.54 59
IV.PARC.HHZ. 2020-10-27T10:42:32.11 0.1 undecidable manual P 36 88.8444 50 -0.06 87
IV.ATPI.EHZ. 2020-10-27T10:42:31.02 0.3 undecidable manual P 52 82.251 50 -0.14 65
IV.RIBO.EHZ. 2020-10-27T10:42:31.20 0.6 undecidable manual S 263 44.8218 50 -0.36 44
IV.MGAB.HHZ. 2020-10-27T10:42:31.02 0.6 undecidable manual S 103 43.1235 50 -0.09 47
IV.MOMA.HHZ. 2020-10-27T10:42:31.78 0.3 undecidable manual P 105 82.1511 50 0.64 57
IV.BADI.EHZ. 2020-10-27T10:42:30.14 0.3 undecidable manual P 43 77.2671 50 -0.24 64
IV.CAFI.HHZ. 2020-10-27T10:42:30.85 0.6 undecidable manual S 39 47.4192 50 -1.39 28
IV.MAON.HHZ. 2020-10-27T10:42:30.06 0.3 undecidable manual P 211 73.7706 50 0.22 65
IV.SSP9.EHZ. 2020-10-27T10:42:30.68 0.3 undecidable manual P 34 77.0673 50 0.32 63
IV.MURB.HHZ. 2020-10-27T10:42:30.86 0.1 undecidable manual P 68 80.7636 50 -0.07 88
IV.ATVO.HHZ. 2020-10-27T10:42:30.33 0.3 undecidable manual P 57 78.2661 50 -0.2 65
IV.CRE.HHZ. 2020-10-27T10:42:30.08 0.1 undecidable manual P 23 74.5698 50 0.11 88
IV.ATMI.HHZ. 2020-10-27T10:42:28.94 0.1 undecidable manual P 55 65.9895 50 0.3 86
IV.ATMC.EHE. 2020-10-27T10:42:28.82 0.1 undecidable manual P 44 69.2751 50 -0.34 85
IV.CASP.HHZ. 2020-10-27T10:42:28.49 0.6 undecidable manual P 249 63.5919 50 0.21 44
IV.TRIF.CHZ. 2020-10-27T10:42:27.62 0.3 undecidable manual P 283 57.498 50 0.28 66
IV.ATVA.EHE. 2020-10-27T10:42:27.72 0.3 undecidable manual P 61 63.8916 50 -0.61 60
TV.SF14.HHZ. 2020-10-27T10:42:26.24 0.6 undecidable manual S 177 27.1506 50 -0.6 43
IV.CSNT.HHZ. 2020-10-27T10:42:26.63 0.1 undecidable manual P 335 57.9975 50 -0.79 75
TV.SF03.EHZ. 2020-10-27T10:42:25.27 0.3 undecidable manual S 161 23.0547 114 -0.41 68
IV.MCIV.CHZ. 2020-10-27T10:42:25.98 0.6 undecidable manual S 165 25.3524 50 -0.39 46
IV.RIBO.EHZ. 2020-10-27T10:42:25.33 0.1 positive manual P 263 44.8218 50 -0.06 94
IV.CAFI.HHZ. 2020-10-27T10:42:25.34 0.1 undecidable manual P 39 47.4192 50 -0.44 87
IV.ARCI.HHZ. 2020-10-27T10:42:24.65 0.6 undecidable manual S 211 18.9699 118 0.22 48
TV.SF04.EHZ. 2020-10-27T10:42:24.17 0.3 undecidable manual S 164 18.9699 118 -0.23 72
IV.MGAB.HHZ. 2020-10-27T10:42:24.88 0.1 undecidable manual P 103 43.1235 50 -0.24 91
TV.SF13.HHZ. 2020-10-27T10:42:24.55 0.3 undecidable manual S 174 20.1687 117 -0.24 71
TV.SF01.EHZ. 2020-10-27T10:42:24.90 0.3 undecidable manual S 187 20.9679 116 -0.13 73
IV.FROS.CHZ. 2020-10-27T10:42:24.69 0.1 undecidable manual P 303 42.5241 50 -0.33 90
IV.SACS.HHZ. 2020-10-27T10:42:23.32 0.1 positive manual P 123 30.5472 50 0.14 95
TV.SF11.HHZ. 2020-10-27T10:42:23.42 0.3 undecidable manual S 155 16.0728 122 -0.12 74
TV.SF03.EHZ. 2020-10-27T10:42:22.14 0.1 positive manual P 161 23.0547 114 0.15 96
IV.MCIV.CHZ. 2020-10-27T10:42:22.51 0.1 positive manual P 165 25.3524 50 0.13 96
TV.SF14.HHZ. 2020-10-27T10:42:22.74 0.1 positive manual P 177 27.1506 50 0.08 97
TV.SF01.EHZ. 2020-10-27T10:42:21.70 0.1 positive manual P 187 20.9679 116 0.09 98
IV.ARCI.HHZ. 2020-10-27T10:42:21.26 0.1 positive manual P 211 18.9699 118 0 100
TV.SF04.EHZ. 2020-10-27T10:42:21.42 0.1 positive manual P 164 18.9699 118 0.17 97
TV.SF13.HHZ. 2020-10-27T10:42:21.66 0.1 positive manual P 174 20.1687 117 0.19 96
TV.SF11.HHZ. 2020-10-27T10:42:20.82 0.1 undecidable manual P 155 16.0728 122 0.07 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHE. ML:3.2 0.011672965 0.1984 AML other m 2020-10-27T10:42:25.64
IV.ARCI.HHN. ML:2.5 0.002663597 0.4608 AML other m 2020-10-27T10:42:25.82
TV.SF04.EHN. ML:3.1 0.009556619 0.2944 AML other m 2020-10-27T10:42:25.69
TV.SF01.EHE. ML:3.0 0.007000968000000001 0.2432 AML other m 2020-10-27T10:42:25.79
TV.SF01.EHN. ML:3.3 0.0143043 0.2432 AML other m 2020-10-27T10:42:25.78
IV.ARCI.HHE. ML:2.5 0.002602638 0.2816 AML other m 2020-10-27T10:42:26.44
IV.MCIV.CHN. ML:2.5 0.0019273305 0.2752 AML other m 2020-10-27T10:42:27.53
IV.MCIV.CHE. ML:2.5 0.001929904 0.2048 AML other m 2020-10-27T10:42:28.35
IV.SACS.HNE. ML:2.1 0.00059641035 0.2368 AML other m 2020-10-27T10:42:31.05
IV.SACS.HHE. ML:2.1 0.0005971328000000001 0.224 AML other m 2020-10-27T10:42:31.05
IV.CAFI.HNE. ML:2.2 0.0005332834 0.4096 AML other m 2020-10-27T10:42:31.71
IV.CAFI.HNN. ML:2.1 0.00036019835 0.4096 AML other m 2020-10-27T10:42:32.22
IV.CAFI.HHN. ML:2.2 0.000436618 0.2432 AML other m 2020-10-27T10:42:32.57
IV.SACS.HNN. ML:2.2 0.0007204310499999999 0.5952 AML other m 2020-10-27T10:42:33.19
IV.SACS.HHN. ML:2.2 0.00070275955 0.6016 AML other m 2020-10-27T10:42:33.19
IV.CAFI.HHE. ML:2.2 0.00042282745 0.3392 AML other m 2020-10-27T10:42:33.56
IV.FROS.CHN. ML:2.5 0.00110955115 0.544 AML other m 2020-10-27T10:42:34.09
IV.MGAB.HHE. ML:2.2 0.0005714902 0.1792 AML other m 2020-10-27T10:42:34.33
IV.MGAB.HNE. ML:2.2 0.00053918195 0.1984 AML other m 2020-10-27T10:42:34.33
IV.MGAB.HHN. ML:2.4 0.0007797206 0.1856 AML other m 2020-10-27T10:42:34.41
IV.MGAB.HNN. ML:2.4 0.0007352947000000001 0.192 AML other m 2020-10-27T10:42:34.41
IV.CSNT.HHN. ML:2.4 0.0006139027000000001 0.3008 AML other m 2020-10-27T10:42:35.55
IV.TRIF.CHE. ML:2.4 0.0006116927999999999 0.2368 AML other m 2020-10-27T10:42:35.61
IV.TRIF.CHN. ML:2.4 0.0006429979 0.2624 AML other m 2020-10-27T10:42:35.82
IV.CSNT.HHE. ML:2.4 0.00048269255 0.2048 AML other m 2020-10-27T10:42:35.88
IV.FROS.CHE. ML:2.6 0.0011626876500000001 0.3776 AML other m 2020-10-27T10:42:36.59
IV.CASP.HHE. ML:2.5 0.0006198949 0.2624 AML other m 2020-10-27T10:42:37.66
IV.CASP.HHN. ML:2.5 0.0006414999999999999 0.36 AML other m 2020-10-27T10:42:39.70
IV.ATMI.HHE. ML:3.0 0.0017112705 0.2944 AML other m 2020-10-27T10:42:39.68
IV.CRE.HHN. ML:2.5 0.0005463432 0.224 AML other m 2020-10-27T10:42:40.43
IV.CRE.HHE. ML:2.5 0.0005087283500000001 0.2752 AML other m 2020-10-27T10:42:42.19
IV.ATMI.HHN. ML:3.0 0.0017939505 0.3008 AML other m 2020-10-27T10:42:43.05
IV.ASQU.HHE. ML:2.6 0.0004446751 0.3392 AML other m 2020-10-27T10:42:44.72
IV.BADI.EHN. ML:2.3 0.0003130906 0.4608 AML other m 2020-10-27T10:42:44.73
IV.ATVO.HHE. ML:2.6 0.00058275655 0.3392 AML other m 2020-10-27T10:42:44.94
IV.MOMA.HNN. ML:2.3 0.00025748815 0.3008 AML other m 2020-10-27T10:42:46.05
IV.MOMA.HHE. ML:2.4 0.0003229912 0.3392 AML other m 2020-10-27T10:42:46.30
IV.MOMA.HNE. ML:2.4 0.00033883485 0.3328 AML other m 2020-10-27T10:42:46.30
IV.ATPI.EHN. ML:2.3 0.00028087815 0.32 AML other m 2020-10-27T10:42:46.31
IV.ATPI.HNE. ML:2.4 0.00032257285000000005 0.704 AML other m 2020-10-27T10:42:46.62
IV.ATPI.EHE. ML:2.3 0.00027703644999999997 0.6976 AML other m 2020-10-27T10:42:46.63
IV.MOMA.HHN. ML:2.3 0.00024349999999999998 0.5 AML other m 2020-10-27T10:42:46.63
IV.BADI.EHE. ML:2.4 0.00034789605 0.3008 AML other m 2020-10-27T10:42:46.91
IV.PARC.HHE. ML:2.2 0.00018915695 0.8 AML other m 2020-10-27T10:42:47.57
IV.ATPI.HNN. ML:2.4 0.00029944503 0.5888 AML other m 2020-10-27T10:42:47.27
IV.ASSB.HHN. ML:2.2 0.00018409834999999998 0.3392 AML other m 2020-10-27T10:42:47.15
IV.ATVO.HHN. ML:2.2 0.00025174595 0.32 AML other m 2020-10-27T10:42:48.21
IV.ASQU.HHN. ML:2.4 0.0002864895 0.544 AML other m 2020-10-27T10:42:48.19
IV.ASSB.HHE. ML:2.2 0.00019894529999999998 0.5248 AML other m 2020-10-27T10:42:49.07
IV.PARC.HHN. ML:2.3 0.00021334105 0.5376 AML other m 2020-10-27T10:42:49.53
IV.SSFR.HHN. ML:2.4 0.00024847265 0.2816 AML other m 2020-10-27T10:42:50.17
IV.SSFR.HNN. ML:2.5 0.00028140435 0.2688 AML other m 2020-10-27T10:42:50.04
IV.APEC.HHN. ML:2.4 0.00028591405000000003 0.32 AML other m 2020-10-27T10:42:51.76
IV.APEC.HHE. ML:2.5 0.00034057415 0.3648 AML other m 2020-10-27T10:42:52.64
IV.SSFR.HHE. ML:2.4 0.0002396837 0.3584 AML other m 2020-10-27T10:42:54.56
IV.SSFR.HNE. ML:2.5 0.00025343075 0.3584 AML other m 2020-10-27T10:42:54.57
IV.PE3.EHN. ML:2.7 0.0004921373 0.5824 AML other m 2020-10-27T10:42:56.63
IV.MPAG.EHN. ML:2.0 0.0000749731 0.5568 AML other m 2020-10-27T10:42:57.22
IV.PE3.EHE. ML:2.7 0.0005430074 0.4416 AML other m 2020-10-27T10:42:57.45
IV.MPAG.EHE. ML:1.9 0.0000669244 0.5248 AML other m 2020-10-27T10:42:58.52
IV.EL6.EHN. ML:2.5 0.00021217795 0.4032 AML other m 2020-10-27T10:42:58.55
IV.EL6.EHE. ML:2.5 0.0002057706 0.6656 AML other m 2020-10-27T10:43:00.66
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
Waveforms Seismic signals in miniseed + resp format Download