Earthquake with magnitude of ML 0.9 on date 23-06-2020 and time 16:41:30 (Italy) in region 1 km N Proceno (VT)

A magnitude ML 0.9 earthquake occured in region: 1 km N Proceno (VT), on

  • 23-06-2020 14:41:30 (UTC)
  • 23-06-2020 16:41:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.77, 11.83 at 8 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
Proceno VT 1 557 557
Acquapendente VT 4 5506 6063
Onano VT 8 995 7058
Castell'Azzara GR 11 1476 8534
Grotte di Castro VT 11 2683 11217
San Lorenzo Nuovo VT 11 2091 13308
San Casciano dei Bagni SI 12 1632 14940
Allerona TR 13 1794 16734
Sorano GR 13 3428 20162
Piancastagnaio SI 14 4230 24392
Gradoli VT 14 1353 25745
Castel Giorgio TR 14 2131 27876
Castel Viscardo TR 14 2938 30814
Radicofani SI 15 1097 31911
Latera VT 16 836 32747
Abbadia San Salvatore SI 17 6444 39191
Fabro TR 19 2876 42067
Bolsena VT 19 3991 46058
Pitigliano GR 20 3818 49876

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km NW of Viterbo (67173 inhabitants)
58 Km E of Grosseto (82087 inhabitants)
59 Km SW of Perugia (166134 inhabitants)
71 Km W of Terni (111501 inhabitants)
73 Km SE of Siena (53903 inhabitants)
75 Km W of Foligno (57155 inhabitants)
75 Km N of Civitavecchia (52991 inhabitants)
78 Km S of Arezzo (99543 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 0.9 2020-06-23
14:41:30
42.77 11.83 8 2020-06-23
14:47:07
Sala Sismica INGV-Roma 80444991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-06-23 14:41:30 ± 0.14
Latitude 42.77 ± 0.00
Longitude 11.83 ± 0.00
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 80444991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 407
Semi-minor axis of confidence ellipse (meter) 150
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 167
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.09982
Epicentral distance of station farthest from the epicenter (degree) 0.25271
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 80444991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-06-23 14:47:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2020-06-23T14:41:40.96 0.6 undecidable manual S 56 0.2527 105 0.2 47
TV.SF14.HHZ. 2020-06-23T14:41:37.03 0.6 undecidable manual S 265 0.1565 113 -0.22 48
IV.LATE.HHZ. 2020-06-23T14:41:37.27 0.6 undecidable manual S 186 0.1574 113 0 50
TV.SF13.HHZ. 2020-06-23T14:41:37.17 0.6 undecidable manual S 288 0.1601 113 -0.19 48
TV.SF11.HHZ. 2020-06-23T14:41:37.21 0.6 undecidable manual S 312 0.1466 115 0.31 47
IV.MGAB.HHZ. 2020-06-23T14:41:36.01 0.3 undecidable manual P 56 0.2527 105 -0.49 66
TV.SF04.EHZ. 2020-06-23T14:41:36.61 0.3 undecidable manual S 298 0.1385 116 -0.02 75
IV.SACS.HHZ. 2020-06-23T14:41:35.37 0.3 undecidable manual S 37 0.0998 124 0.05 75
IV.MCIV.CHZ. 2020-06-23T14:41:35.52 0.3 undecidable manual S 275 0.1106 122 -0.17 73
TV.SF03.EHZ. 2020-06-23T14:41:35.62 0.3 undecidable manual S 288 0.1088 122 0 75
TV.SF04.EHZ. 2020-06-23T14:41:34.23 0.1 undecidable manual P 298 0.1385 116 0.12 98
TV.SF11.HHZ. 2020-06-23T14:41:34.49 0.3 undecidable manual P 312 0.1466 115 0.21 72
TV.SF14.HHZ. 2020-06-23T14:41:34.40 0.1 undecidable manual P 265 0.1565 113 -0.08 98
IV.LATE.HHZ. 2020-06-23T14:41:34.75 0.3 undecidable manual P 186 0.1574 113 0.26 71
TV.SF13.HHZ. 2020-06-23T14:41:34.54 0.1 undecidable manual P 288 0.1601 113 0 100
IV.SACS.HHZ. 2020-06-23T14:41:33.29 0.1 positive manual P 37 0.0998 124 -0.07 99
IV.MCIV.CHZ. 2020-06-23T14:41:33.60 0.1 undecidable manual P 275 0.1106 122 0.03 100
TV.SF03.EHZ. 2020-06-23T14:41:33.62 0.3 undecidable manual P 288 0.1088 122 0.09 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HHE. ML:0.8 8.595E-5 0.68 AML other m 2020-06-23T14:41:35.46
IV.MCIV.CHN. ML:0.8 7.01E-5 1.06 AML other m 2020-06-23T14:41:35.58
IV.MCIV.CHE. ML:0.8 7.07E-5 0.44 AML other m 2020-06-23T14:41:36.45
IV.SACS.HHN. ML:0.7 7.535E-5 0.36 AML other m 2020-06-23T14:41:36.58
IV.MGAB.HHN. ML:0.9 3.835E-5 0.2 AML other m 2020-06-23T14:41:41.22
IV.MGAB.HHE. ML:0.8 3.325E-5 1.08 AML other m 2020-06-23T14:41:42.55
IV.LATE.HHN. ML:1.1 0.000125 0.34 AML other m 2020-06-23T14:41:43.96
IV.LATE.HHE. ML:1.1 0.0001265 0.38 AML other m 2020-06-23T14:41:45.46
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