Earthquake with magnitude of ML 1.1 on date 23-06-2020 and time 21:23:36 (Italy) in region 1 km N Proceno (VT)

A magnitude ML 1.1 earthquake occured in region: 1 km N Proceno (VT), on

  • 23-06-2020 19:23:36 (UTC)
  • 23-06-2020 21:23:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.76, 11.83 at 7 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
Grotte di Castro VT 10 2683 9741
San Lorenzo Nuovo VT 11 2091 11832
Castell'Azzara GR 11 1476 13308
San Casciano dei Bagni SI 13 1632 14940
Allerona TR 13 1794 16734
Sorano GR 13 3428 20162
Gradoli VT 13 1353 21515
Castel Giorgio TR 14 2131 23646
Castel Viscardo TR 14 2938 26584
Piancastagnaio SI 15 4230 30814
Latera VT 15 836 31650
Radicofani SI 16 1097 32747
Abbadia San Salvatore SI 18 6444 39191
Bolsena VT 18 3991 43182
Fabro TR 19 2876 46058
Pitigliano GR 19 3818 49876

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NW of Viterbo (67173 inhabitants)
59 Km E of Grosseto (82087 inhabitants)
60 Km SW of Perugia (166134 inhabitants)
70 Km W of Terni (111501 inhabitants)
74 Km SE of Siena (53903 inhabitants)
74 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 1.1 2020-06-23
19:23:36
42.76 11.83 7 2020-06-23
19:28:13
Sala Sismica INGV-Roma 80455441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-06-23 19:23:36 ± 0.11
Latitude 42.76 ± 0.00
Longitude 11.83 ± 0.00
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 80455441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 359
Semi-minor axis of confidence ellipse (meter) 97
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 169
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.27519
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 80455441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-06-23 19:28:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2020-06-23T19:23:46.68 0.6 undecidable manual S 54 0.2545 104 0.01 49
IV.ARCI.HHZ. 2020-06-23T19:23:46.88 0.6 undecidable manual S 289 0.2752 103 -0.57 43
TV.SF01.EHZ. 2020-06-23T19:23:44.50 0.3 undecidable manual S 284 0.2023 107 -0.23 71
TV.SF14.HHZ. 2020-06-23T19:23:43.13 0.6 undecidable manual S 267 0.1592 111 -0.01 50
TV.SF13.HHN. 2020-06-23T19:23:43.23 0.3 undecidable manual S 290 0.1646 110 -0.12 73
IV.MGAB.HHZ. 2020-06-23T19:23:42.06 0.3 undecidable manual P 54 0.2545 104 -0.35 68
TV.SF04.EHZ. 2020-06-23T19:23:42.57 0.6 undecidable manual S 300 0.1448 113 -0.06 49
IV.ARCI.HHZ. 2020-06-23T19:23:42.85 0.3 undecidable manual P 289 0.2752 103 -0.01 73
IV.LATE.HHN. 2020-06-23T19:23:42.74 0.6 undecidable manual S 188 0.1502 112 -0.1 49
TV.SF11.HHZ. 2020-06-23T19:23:42.90 0.6 undecidable manual S 314 0.1538 112 -0.05 49
TV.SF03.EHE. 2020-06-23T19:23:41.62 0.3 undecidable manual S 290 0.1133 118 0.06 74
IV.SACS.HHZ. 2020-06-23T19:23:41.25 0.3 undecidable manual S 34 0.1034 121 0.03 75
TV.SF01.EHZ. 2020-06-23T19:23:41.48 0.3 undecidable manual P 284 0.2023 107 0.19 71
IV.MCIV.CHZ. 2020-06-23T19:23:41.56 0.3 undecidable manual S 278 0.1142 118 -0.02 75
TV.SF11.HHZ. 2020-06-23T19:23:40.49 0.3 undecidable manual P 314 0.1538 112 0.23 71
TV.SF13.HHN. 2020-06-23T19:23:40.55 0.1 undecidable manual P 290 0.1646 110 0.05 98
TV.SF04.EHZ. 2020-06-23T19:23:40.28 0.1 undecidable manual P 300 0.1448 113 0.2 96
TV.SF14.HHZ. 2020-06-23T19:23:40.37 0.1 undecidable manual P 267 0.1592 111 0 99
IV.LATE.HHN. 2020-06-23T19:23:40.19 0.3 undecidable manual P 188 0.1502 112 -0.01 74
IV.SACS.HHZ. 2020-06-23T19:23:39.24 0.1 positive manual P 34 0.1034 121 -0.02 100
IV.MCIV.CHZ. 2020-06-23T19:23:39.57 0.1 undecidable manual P 278 0.1142 118 0.1 98
TV.SF03.EHE. 2020-06-23T19:23:39.68 0.1 undecidable manual P 290 0.1133 118 0.22 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HHN. ML:1 0.0001235 0.26 AML other m 2020-06-23T19:23:41.40
IV.SACS.HHE. ML:1 0.00015 0.44 AML other m 2020-06-23T19:23:42.52
IV.MCIV.CHE. ML:1 0.00010795 0.5 AML other m 2020-06-23T19:23:42.27
IV.MCIV.CHN. ML:0.8 8.035E-5 0.42 AML other m 2020-06-23T19:23:43.02
TV.SF04.EHE. ML:1.2 0.0001625 0.26 AML other m 2020-06-23T19:23:43.45
TV.SF04.EHN. ML:1.1 0.000137 1.08 AML other m 2020-06-23T19:23:43.93
TV.SF01.EHN. ML:1.4 0.0001695 0.68 AML other m 2020-06-23T19:23:45.08
TV.SF01.EHE. ML:1.3 0.000147 0.14 AML other m 2020-06-23T19:23:45.49
IV.MGAB.HHN. ML:1.2 7.62E-5 1.52 AML other m 2020-06-23T19:23:48.85
IV.MGAB.HHE. ML:1.2 8.595E-5 1.84 AML other m 2020-06-23T19:23:49.98
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