Earthquake with magnitude of ML 1.8 on date 08-09-2020 and time 17:15:20 (Italy) in region 2 km SW Radicofani (SI)

A magnitude ML 1.8 earthquake occured in region: 2 km SW Radicofani (SI), on

  • 08-09-2020 15:15:20 (UTC)
  • 08-09-2020 17:15:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8860, 11.7520 at 7 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
Radicofani SI 2 1097 1097
Abbadia San Salvatore SI 6 6444 7541
Piancastagnaio SI 6 4230 11771
San Casciano dei Bagni SI 10 1632 13403
Castell'Azzara GR 13 1476 14879
Santa Fiora GR 15 2622 17501
Cetona SI 15 2755 20256
Sarteano SI 15 4717 24973
Proceno VT 16 557 25530
Seggiano GR 17 961 26491
Castiglione d'Orcia SI 17 2346 28837
Castel del Piano GR 17 4690 33527
Arcidosso GR 17 4285 37812
Acquapendente VT 18 5506 43318
Allerona TR 20 1794 45112

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km E of Grosseto (82087 inhabitants)
57 Km W of Perugia (166134 inhabitants)
59 Km SE of Siena (53903 inhabitants)
60 Km NW of Viterbo (67173 inhabitants)
66 Km S of Arezzo (99543 inhabitants)
78 Km W of Foligno (57155 inhabitants)
82 Km W of Terni (111501 inhabitants)
88 Km N of Civitavecchia (52991 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 1.8 2020-09-08
15:15:20
42.8858 11.752 7 2021-02-26
14:56:06
Bollettino Sismico Italiano INGV 84772831
Reviewed
Rev100
ML 2.0 2020-09-08
15:15:20
42.8838 11.7618 7 2020-09-08
15:31:12
Sala Sismica INGV-Roma 82739201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-08 15:15:20 ± 0.07
Latitude 42.8858 ± 0.0063
Longitude 11.7520 ± 0.0049
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84772831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 691
Semi-minor axis of confidence ellipse (meter) 429
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 178
Circular confidence region, given by single value of horizontal uncertainty (meter) 690.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.74644
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.4
Num. used stations 31
Type of magnitude ML
Reference to an origin 82739201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-08 15:31:12

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 84772831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-30 08:36:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PZUN.HHZ. 2020-09-08T15:17:13.90 3.0 undecidable manual Sg 6.66 0
IV.CMPR.HHZ. 2020-09-08T15:17:12.69 3.0 undecidable manual Sg 7.19 0
IV.SGTA.HHZ. 2020-09-08T15:16:48.66 3.0 undecidable manual Sn -4.93 0
IV.IMI.HHZ. 2020-09-08T15:16:48.59 3.0 undecidable manual Sn 0.77 0
XK.GIZZ.HHZ. 2020-09-08T15:16:42.82 3.0 negative manual Pn 2.89 0
IV.RAVA.EHZ. 2020-09-08T15:16:23.91 3.0 undecidable manual Sg 2.26 0
OT.OT05.EHZ. 2020-09-08T15:16:18.92 3.0 positive manual Pg 7.16 0
IV.EUCT.HNZ. 2020-09-08T15:16:15.11 3.0 positive manual Pg 5.31 0
IV.CMPR.HHZ. 2020-09-08T15:16:15.63 3.0 undecidable manual Pn -4.22 0
IV.SARZ.HHZ. 2020-09-08T15:16:06.29 3.0 negative manual Pn -1.66 0
IV.SBPO.HNZ. 2020-09-08T15:16:04.29 3.0 positive manual Pg 4.66 0
IV.MNTT.EHZ. 2020-09-08T15:16:04.74 3.0 undecidable manual S -3.6 0
IV.CAFI.HHZ. 2020-09-08T15:15:37.19 0.6 undecidable manual S 19 52.1034 50 -0.17 46
IV.CRE.HHZ. 2020-09-08T15:15:35.43 0.3 undecidable manual P 11 82.8504 50 0.61 58
IV.BARO.EHZ. 2020-09-08T15:15:33.65 0.6 undecidable manual P 161 74.8695 50 0.06 45
IV.CASP.HHZ. 2020-09-08T15:15:33.60 0.6 undecidable manual P 262 72.8715 50 0.32 43
IV.MOMA.HHZ. 2020-09-08T15:15:32.30 0.3 undecidable manual P 98 67.1772 50 -0.1 68
IV.CSNT.HHZ. 2020-09-08T15:15:32.99 0.3 undecidable manual P 330 75.0693 50 -0.63 59
IV.FROS.CHE. 2020-09-08T15:15:31.49 0.1 negative manual P 307 60.1953 50 0.16 91
IV.MGAB.HHZ. 2020-09-08T15:15:30.08 0.3 undecidable manual S 84 29.4483 104 -0.6 65
IV.CAFI.HHZ. 2020-09-08T15:15:29.99 0.3 undecidable manual P 19 52.1034 50 -0.1 70
IV.ARCI.HHZ. 2020-09-08T15:15:27.94 0.3 undecidable manual S 261 22.755 108 -0.52 67
TV.SF14.HHN. 2020-09-08T15:15:26.47 0.3 undecidable manual S 218 18.2706 112 -0.53 68
IV.SACS.HHE. 2020-09-08T15:15:26.26 0.6 undecidable manual S 108 13.4754 119 0.79 41
TV.SF01.EHZ. 2020-09-08T15:15:26.61 0.3 undecidable manual S 242 17.3715 113 -0.1 75
IV.LATE.HHZ. 2020-09-08T15:15:26.22 0.3 undecidable manual P 172 30.4473 104 -0.22 71
IV.MGAB.HHZ. 2020-09-08T15:15:25.84 0.3 undecidable manual P 84 29.4483 104 -0.39 69
IV.MCIV.CHZ. 2020-09-08T15:15:25.61 0.3 undecidable manual S 207 13.3755 119 0.16 74
TV.SF13.HHZ. 2020-09-08T15:15:25.26 0.3 undecidable manual S 235 13.0758 119 -0.11 75
IV.ARCI.HHZ. 2020-09-08T15:15:25.11 0.3 undecidable manual P 261 22.755 108 0.16 73
TV.SF04.EHZ. 2020-09-08T15:15:24.17 0.3 undecidable manual S 233 9.2796 128 -0.09 76
TV.SF03.EHE. 2020-09-08T15:15:24.42 0.3 undecidable manual S 210 10.6782 125 -0.23 74
TV.SF14.HHN. 2020-09-08T15:15:24.16 0.3 undecidable manual P 218 18.2706 112 0.05 75
TV.SF01.EHZ. 2020-09-08T15:15:24.21 0.3 undecidable manual P 242 17.3715 113 0.27 72
TV.SF13.HHZ. 2020-09-08T15:15:23.44 0.1 positive manual P 235 13.0758 119 0.28 97
IV.SACS.HHE. 2020-09-08T15:15:23.36 0.1 undecidable manual P 108 13.4754 119 0.14 100
TV.SF11.HHN. 2020-09-08T15:15:23.47 0.3 undecidable manual S 252 6.2937 140 -0.03 77
IV.MCIV.CHZ. 2020-09-08T15:15:23.33 0.1 positive manual P 207 13.3755 119 0.12 100
TV.SF11.HHN. 2020-09-08T15:15:22.29 0.1 negative manual P 252 6.2937 140 0.2 99
TV.SF04.EHZ. 2020-09-08T15:15:22.82 0.3 undecidable manual P 233 9.2796 128 0.29 73
TV.SF03.EHE. 2020-09-08T15:15:22.91 0.3 undecidable manual P 210 10.6782 125 0.16 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHE. ML:2.5 0.0053692390000000005 0.2048 AML other m 2020-09-08T15:15:24.67
TV.SF04.EHN. ML:2.6 0.0072927895 0.2688 AML other m 2020-09-08T15:15:24.76
TV.SF01.EHN. ML:2.3 0.0016813349999999997 0.2048 AML other m 2020-09-08T15:15:26.75
IV.MCIV.CHE. ML:2.2 0.0016720455 0.2304 AML other m 2020-09-08T15:15:27.22
IV.MCIV.CHN. ML:2.1 0.0016323805 0.2048 AML other m 2020-09-08T15:15:27.62
TV.SF01.EHE. ML:2.3 0.0016755420000000001 0.3328 AML other m 2020-09-08T15:15:28.15
IV.ARCI.HNN. ML:2.0 0.0006748914500000001 0.256 AML other m 2020-09-08T15:15:28.40
IV.ARCI.HNE. ML:1.9 0.00054598845 0.1664 AML other m 2020-09-08T15:15:29.47
IV.ARCI.HHE. ML:1.9 0.00055478275 0.1792 AML other m 2020-09-08T15:15:29.56
IV.ARCI.HHN. ML:1.8 0.00038461610000000004 0.256 AML other m 2020-09-08T15:15:30.53
IV.MGAB.HHN. ML:1.8 0.0003594225 0.2304 AML other m 2020-09-08T15:15:31.37
IV.MGAB.HNN. ML:1.8 0.00031843935 0.2176 AML other m 2020-09-08T15:15:31.37
IV.MGAB.HHE. ML:1.8 0.00035440950000000004 0.1408 AML other m 2020-09-08T15:15:33.20
IV.MGAB.HNE. ML:1.8 0.00028785810000000003 0.1408 AML other m 2020-09-08T15:15:33.27
IV.LATE.HHE. ML:1.7 0.00026341844999999995 0.1408 AML other m 2020-09-08T15:15:34.76
IV.LATE.HHN. ML:1.9 0.00037695485 1.5264 AML other m 2020-09-08T15:15:36.85
IV.CAFI.HHE. ML:1.4 0.000058357285 0.3712 AML other m 2020-09-08T15:15:38.37
IV.CRE.HHN. ML:1.4 0.000029331400000000002 0.2432 AML other m 2020-09-08T15:15:38.67
IV.CAFI.HHN. ML:1.2 0.00003783164 1.5776 AML other m 2020-09-08T15:15:41.01
IV.MOMA.HHN. ML:1.7 0.00009706231500000002 0.2176 AML other m 2020-09-08T15:15:44.17
IV.MOMA.HHE. ML:1.9 0.00013227565 0.256 AML other m 2020-09-08T15:15:44.42
IV.BARO.EHE. ML:1.4 0.000041834765 0.4224 AML other m 2020-09-08T15:15:48.11
IV.BARO.EHN. ML:1.3 0.000028521565 1.4496 AML other m 2020-09-08T15:15:51.92
IV.CRE.HHE. ML:1.4 0.00003025 0.42 AML other m 2020-09-08T15:15:58.12
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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