Earthquake with magnitude of ML 0.7 on date 09-08-2020 and time 10:43:24 (UTC) in region 3 km E Santa Fiora (GR)

A magnitude ML 0.7 earthquake occured in region: 3 km E Santa Fiora (GR), on

  • 09-08-2020 10:43:24 (UTC)
  • 09-08-2020 12:43:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.82, 11.63 at 3 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Santa Fiora GR 4 2622 2622
Piancastagnaio SI 6 4230 6852
Castell'Azzara GR 8 1476 8328
Abbadia San Salvatore SI 8 6444 14772
Arcidosso GR 9 4285 19057
Roccalbegna GR 10 1044 20101
Castel del Piano GR 11 4690 24791
Semproniano GR 12 1059 25850
Seggiano GR 13 961 26811
Radicofani SI 15 1097 27908
Sorano GR 17 3428 31336
Proceno VT 18 557 31893

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Grosseto (82087 inhabitants)
60 Km NW of Viterbo (67173 inhabitants)
60 Km SE of Siena (53903 inhabitants)
70 Km W of Perugia (166134 inhabitants)
75 Km S of Arezzo (99543 inhabitants)
82 Km N of Civitavecchia (52991 inhabitants)
88 Km W of Terni (111501 inhabitants)
89 Km W of Foligno (57155 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.7 2020-08-09
10:43:24
42.82 11.63 3 2020-08-09
10:54:03
Sala Sismica INGV-Roma 81807241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-09 10:43:24 ± 0.2
Latitude 42.82 ± 0.01
Longitude 11.63 ± 0.01
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81807241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 698
Semi-minor axis of confidence ellipse (meter) 143
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 185
Circular confidence region, given by single value of horizontal uncertainty (meter) 700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.11421
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0
Num. used stations 1
Type of magnitude ML
Reference to an origin 81807241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-09 10:54:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
AC.KBN.HHZ. 2020-08-09T10:44:50.94 3.0 negative manual Pn 5.04 0
IV.CMPR.HHZ. 2020-08-09T10:44:43.24 3.0 undecidable manual Sg 8.4 0
IV.HPAC.HHZ. 2020-08-09T10:44:33.20 3.0 negative manual Pn -2.94 0
IV.GRI.EHZ. 2020-08-09T10:44:28.24 3.0 undecidable manual Pg 8.97 0
IV.ROSPO.HHZ. 2020-08-09T10:44:24.64 3.0 undecidable manual Sg 15.77 0
XK.GIZZ.HHZ. 2020-08-09T10:44:19.48 3.0 negative manual Pn 3.35 0
IV.PTRJ.HHZ. 2020-08-09T10:44:14.99 3.0 undecidable manual Sg 6.66 0
IV.EUCT.HNZ. 2020-08-09T10:44:07.10 3.0 negative manual Pg 9.14 0
IV.BRSN.EHZ. 2020-08-09T10:44:00.59 3.0 undecidable manual Sn 1.18 0
IV.PESA.HHZ. 2020-08-09T10:43:54.02 3.0 undecidable manual Sn -0.48 0
IV.IMI.HHZ. 2020-08-09T10:43:54.02 3.0 undecidable manual Pn -2.15 0
IV.MNTT.EHZ. 2020-08-09T10:43:46.92 3.0 undecidable manual Sn -1.16 0
IV.AGLI.HHZ. 2020-08-09T10:43:45.51 3.0 undecidable manual Pg 1.2 0
IV.ARCI.HHZ. 2020-08-09T10:43:28.97 0.3 undecidable manual S 286 0.1142 102 0.24 71
IV.MCIV.CHZ. 2020-08-09T10:43:27.51 0.1 undecidable manual S 138 0.0558 114 0.95 75
IV.ARCI.HHZ. 2020-08-09T10:43:26.95 0.3 undecidable manual P 286 0.1142 102 0.13 73
TV.SF03.EHZ. 2020-08-09T10:43:26.20 0.1 undecidable manual S 111 0.0468 118 -0.07 99
TV.SF01.EHZ. 2020-08-09T10:43:26.47 0.1 undecidable manual S 260 0.0468 118 0.23 96
TV.SF14.HHE. 2020-08-09T10:43:26.54 0.6 undecidable manual S 187 0.0657 111 -0.37 47
TV.SF03.EHZ. 2020-08-09T10:43:25.27 0.1 undecidable manual P 111 0.0468 118 -0.13 98
TV.SF01.EHZ. 2020-08-09T10:43:25.33 0.1 undecidable manual P 260 0.0468 118 -0.06 100
TV.SF14.HHE. 2020-08-09T10:43:25.56 0.1 undecidable manual P 187 0.0657 111 -0.21 96
TV.SF04.EHZ. 2020-08-09T10:43:25.86 0.1 undecidable manual S 58 0.0297 130 0.14 98
TV.SF11.HHE. 2020-08-09T10:43:25.66 0.1 undecidable manual P 39 0.0621 112 -0.05 99
IV.MCIV.CHZ. 2020-08-09T10:43:25.31 0.1 undecidable manual P 138 0.0558 114 -0.26 95
TV.SF04.EHZ. 2020-08-09T10:43:25.03 0.1 undecidable manual P 58 0.0297 130 -0.05 100
IV.RCAV.EHZ. 2020-08-09T10:43:24.67 3.0 positive manual Pg 0.35 0
TV.SF13.HHE. 2020-08-09T10:43:24.57 0.1 undecidable manual P 252 0.0045 169 -0.21 97
TV.SF13.HHE. 2020-08-09T10:43:24.89 0.6 undecidable manual S 252 0.0045 169 -0.3 48
IV.RIBO.EHZ.01 2020-08-09T10:43:20.88 3.0 positive manual P -1.59 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF01.EHE. ML:0 0.000702 0.44 AML other m 2020-08-09T10:43:27.67
TV.SF04.EHE. ML:0 0.00347 0.26 AML other m 2020-08-09T10:43:27.29
IV.MCIV.CHE. ML:0 0.000417 1.14 AML other m 2020-08-09T10:43:27.39
TV.SF01.EHN. ML:0 0.000806 0.72 AML other m 2020-08-09T10:43:28.11
IV.MCIV.CHN. ML:0 0.0004505 0.74 AML other m 2020-08-09T10:43:28.14
IV.ARCI.HHE. ML:0.7 7.6744985E-5 2.3808 AML other m 2020-08-09T10:43:31.61
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download