Earthquake with magnitude of ML 1.0 on date 04-08-2020 and time 08:19:25 (Italy) in region 2 km E Visso (MC)

A magnitude ML 1.0 earthquake occured in region: 2 km E Visso (MC), on

  • 04-08-2020 06:19:25 (UTC)
  • 04-08-2020 08:19:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.92, 13.12 at 12 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
Visso MC 2 1107 1107
Ussita MC 3 444 1551
Castelsantangelo sul Nera MC 5 281 1832
Preci PG 8 724 2556
Bolognola MC 12 142 2698
Monte Cavallo MC 12 145 2843
Fiordimonte MC 13 202 3045
Acquacanina MC 13 121 3166
Fiastra MC 13 559 3725
Pieve Torina MC 14 1458 5183
Norcia PG 15 4957 10140
Pievebovigliana MC 16 866 11006
Sellano PG 16 1079 12085
Montemonaco AP 17 604 12689
Montefortino FM 19 1178 13867
Muccia MC 19 915 14782
Sarnano MC 20 3264 18046
Cerreto di Spoleto PG 20 1075 19121
Montegallo AP 20 523 19644

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
56 Km NE of Terni (111501 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
63 Km E of Perugia (166134 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
100 Km NE of Viterbo (67173 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 1.0 2020-08-04
06:19:25
42.92 13.12 12 2020-08-04
06:28:25
Sala Sismica INGV-Roma 81628121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-04 06:19:25 ± 0.14
Latitude 42.92 ± 0.01
Longitude 13.12 ± 0.01
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81628121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 800
Semi-minor axis of confidence ellipse (meter) 491
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 800
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.2653
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 81628121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-04 06:28:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.SATI.HHZ. 2020-08-04T06:21:17.78 3.0 undecidable manual Sn -1.69 0
GU.ENR.HHZ. 2020-08-04T06:21:10.97 3.0 undecidable manual Sn 3.18 0
CR.STON.BHZ. 2020-08-04T06:21:09.06 3.0 undecidable manual Sn 6.79 0
IV.CMPR.HHZ. 2020-08-04T06:21:02.08 3.0 undecidable manual Sg 8.9 0
ST.GAGG.HHZ. 2020-08-04T06:20:59.64 3.0 undecidable manual Sg 8.38 0
IV.IMI.HHZ. 2020-08-04T06:20:58.74 3.0 undecidable manual Sn 0.97 0
GU.GBOS.HHZ. 2020-08-04T06:20:55.87 3.0 undecidable manual Sn -4.96 0
GU.BLANC.HHZ. 2020-08-04T06:20:52.17 3.0 positive manual Pg 17.93 0
ST.RONC.HNZ. 2020-08-04T06:20:43.49 3.0 undecidable manual Sn -7.78 0
IV.BRMO.HHZ. 2020-08-04T06:20:30.26 3.0 positive manual Pg 11.76 0
GU.CIRO.HHZ. 2020-08-04T06:20:24.12 3.0 undecidable manual Pn -3.18 0
IV.SBPO.HNZ. 2020-08-04T06:20:22.67 3.0 undecidable manual Sn -6.26 0
OX.CIMO.HHZ. 2020-08-04T06:20:13.72 3.0 positive manual Pn 2.27 0
IV.MNTV.HNZ. 2020-08-04T06:20:07.85 3.0 negative manual Pg 7.26 0
IV.SBPO.HNZ. 2020-08-04T06:20:01.97 3.0 undecidable manual Pg 3.19 0
IV.ROSPO.HHZ. 2020-08-04T06:19:55.75 3.0 positive manual Pg 3.75 0
IV.FIR.HHZ. 2020-08-04T06:19:43.32 3.0 undecidable manual P -0.01 0
IV.PE3.EHZ. 2020-08-04T06:19:42.31 3.0 undecidable manual S -2.39 0
IV.COR1.EHZ. 2020-08-04T06:19:42.24 3.0 undecidable manual S -2.19 0
IV.EL6.EHZ. 2020-08-04T06:19:40.29 3.0 undecidable manual S 2.53 0
IV.ARVD.HHZ. 2020-08-04T06:19:39.10 3.0 undecidable manual S -0.74 0
IV.ROM9.HNZ. 2020-08-04T06:19:37.86 3.0 negative manual P -4.68 0
IV.MTRA.EHZ. 2020-08-04T06:19:35.33 0.3 undecidable manual S 129 0.2653 95 -0.28 71
IV.MF5.EHZ. 2020-08-04T06:19:35.93 0.3 undecidable manual S 76 0.259 95 0.5 66
IV.MML1.EHE. 2020-08-04T06:19:34.05 0.3 undecidable manual S 331 0.2167 97 -0.13 72
IV.CSP1.EHZ. 2020-08-04T06:19:32.67 0.3 undecidable manual S 21 0.179 101 -0.42 69
IV.MMO1.EHZ. 2020-08-04T06:19:31.83 0.6 undecidable manual S 99 0.1565 105 -0.59 45
IT.MTCL.HGZ. 2020-08-04T06:19:31.21 0.3 undecidable manual S 309 0.1097 120 0.05 76
IV.MTRA.EHZ. 2020-08-04T06:19:31.10 0.1 undecidable manual P 129 0.2653 95 -0.15 97
IV.MF5.EHZ. 2020-08-04T06:19:31.37 0.1 undecidable manual P 76 0.259 95 0.22 94
IV.MML1.EHE. 2020-08-04T06:19:30.59 0.1 undecidable manual P 331 0.2167 97 0.17 97
IV.NRCA.HHZ. 2020-08-04T06:19:30.57 0.3 undecidable manual S 181 0.0908 128 -0.12 75
IV.FEMA.HNZ. 2020-08-04T06:19:30.17 0.6 undecidable manual S 308 0.0612 143 0.09 51
IV.MC2.EHZ. 2020-08-04T06:19:29.93 0.3 undecidable manual S 104 0.0549 147 -0.03 77
IV.CSP1.EHZ. 2020-08-04T06:19:29.69 0.1 undecidable manual P 21 0.179 101 -0.1 98
IV.MMO1.EHZ. 2020-08-04T06:19:29.24 0.1 undecidable manual P 99 0.1565 105 -0.17 99
IV.NRCA.HHZ. 2020-08-04T06:19:28.55 0.1 undecidable manual P 181 0.0908 128 0.14 99
IV.FEMA.HNZ. 2020-08-04T06:19:28.40 0.6 undecidable manual P 308 0.0612 143 0.35 48
IV.MC2.EHZ. 2020-08-04T06:19:28.13 0.1 undecidable manual P 104 0.0549 147 0.14 100
IT.MTCL.HGZ. 2020-08-04T06:19:28.82 0.3 undecidable manual P 309 0.1097 120 0.14 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.3 0.0002165 0.16 AML other m 2020-08-04T06:19:30.80
IV.NRCA.HHN. ML:1.2 0.000181 0.96 AML other m 2020-08-04T06:19:30.98
IV.CSP1.EHE. ML:0.9 6.0787985E-5 0.1184 AML other m 2020-08-04T06:19:32.94
IV.CSP1.EHN. ML:0.7 3.7225125E-5 0.1024 AML other m 2020-08-04T06:19:32.94
IV.MTRA.EHE. ML:1.1 5.4804575E-5 0.5792 AML other m 2020-08-04T06:19:35.88
IV.MTRA.EHN. ML:1 5.1860905E-5 0.16 AML other m 2020-08-04T06:19:35.80
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