Earthquake with magnitude of ML 1.0 on date 04-08-2020 and time 20:35:43 (Italy) in region 1 km SW Ussita (MC)

A magnitude ML 1.0 earthquake occured in region: 1 km SW Ussita (MC), on

  • 04-08-2020 18:35:43 (UTC)
  • 04-08-2020 20:35:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.94, 13.13 at 11 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
Ussita MC 1 444 444
Visso MC 3 1107 1551
Castelsantangelo sul Nera MC 5 281 1832
Preci PG 10 724 2556
Bolognola MC 10 142 2698
Acquacanina MC 11 121 2819
Fiastra MC 11 559 3378
Fiordimonte MC 11 202 3580
Monte Cavallo MC 12 145 3725
Pieve Torina MC 13 1458 5183
Pievebovigliana MC 14 866 6049
Norcia PG 17 4957 11006
Montemonaco AP 17 604 11610
Sellano PG 17 1079 12689
Muccia MC 17 915 13604
Montefortino FM 17 1178 14782
Sarnano MC 18 3264 18046
Amandola FM 19 3629 21675
Montegallo AP 20 523 22198

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
58 Km NE of Terni (111501 inhabitants)
63 Km E of Perugia (166134 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
96 Km NW of Montesilvano (53738 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
18:35:43
42.94 13.13 11 2020-08-04
18:48:12
Sala Sismica INGV-Roma 81653381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-04 18:35:43 ± 0.05
Latitude 42.94 ± 0.00
Longitude 13.13 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81653381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 414
Semi-minor axis of confidence ellipse (meter) 295
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 199
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) 101
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35883
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 81653381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-04 18:48:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SARZ.HHZ. 2020-08-04T18:37:18.95 3.0 undecidable manual Sn -0.31 0
IT.LNT.HGZ. 2020-08-04T18:37:16.48 3.0 undecidable manual Pg 16.93 0
IV.MNTV.HNZ. 2020-08-04T18:37:16.11 3.0 undecidable manual Sg 14.08 0
IV.SBPO.HNZ. 2020-08-04T18:37:09.90 3.0 undecidable manual Sg 11.11 0
GU.GRAM.HHZ. 2020-08-04T18:36:57.30 3.0 undecidable manual Sn -0.54 0
IV.ECTS.HHZ. 2020-08-04T18:36:52.36 3.0 undecidable manual Pn 0.18 0
IV.SARZ.HHZ. 2020-08-04T18:36:49.46 3.0 positive manual Pg 14.67 0
IV.PAOL.HHZ. 2020-08-04T18:36:37.08 3.0 undecidable manual Sg 0.45 0
IV.IMI.HHZ. 2020-08-04T18:36:37.50 3.0 undecidable manual Pn -0.21 0
IV.BRSN.EHZ. 2020-08-04T18:36:34.18 3.0 undecidable manual Sg 1.17 0
IT.FIE.HGZ. 2020-08-04T18:36:33.52 3.0 undecidable manual Sg 2.87 0
IV.RIBO.EHZ.01 2020-08-04T18:36:29.21 3.0 undecidable manual Sg 5.33 0
ST.GAGG.HHZ. 2020-08-04T18:36:29.80 3.0 undecidable manual Pn -5.98 0
IV.FIR.HHZ. 2020-08-04T18:36:26.76 3.0 undecidable manual Sn -3.83 0
IV.CMPR.HHZ. 2020-08-04T18:36:26.26 3.0 undecidable manual Pg 2.99 0
IV.BRSN.EHZ. 2020-08-04T18:36:04.58 3.0 positive manual Pn -4.23 0
IV.VIVA.HHZ. 2020-08-04T18:36:04.88 3.0 undecidable manual Sn -2.47 0
IV.ASSB.HHN. 2020-08-04T18:35:56.20 0.3 undecidable manual S 287 0.3588 50 0.05 71
IV.MF5.EHZ. 2020-08-04T18:35:53.53 0.6 undecidable manual S 79 0.2464 50 0.72 41
IV.MML1.EHE. 2020-08-04T18:35:51.60 0.3 undecidable manual S 326 0.2077 50 -0.08 72
IV.PF6.EHE. 2020-08-04T18:35:51.30 0.3 undecidable manual S 13 0.2032 50 -0.23 70
IV.CESI.HHZ. 2020-08-04T18:35:50.80 0.3 undecidable manual S 292 0.1763 50 0.05 74
IV.ASSB.HHN. 2020-08-04T18:35:50.48 1.0 undecidable manual P 287 0.3588 50 -0.13 23
IV.CSP1.EHZ. 2020-08-04T18:35:50.28 0.1 undecidable manual S 20 0.161 50 -0.01 98
IV.MMO1.EHZ. 2020-08-04T18:35:49.61 0.1 undecidable manual S 106 0.1502 50 -0.35 92
IV.MF5.EHZ. 2020-08-04T18:35:49.02 0.6 negative manual P 79 0.2464 50 0.34 46
IV.FDMO.HHZ. 2020-08-04T18:35:48.43 0.1 undecidable manual S 342 0.1007 134 -0.06 99
IV.NRCA.HHZ. 2020-08-04T18:35:48.39 0.1 undecidable manual S 186 0.107 133 -0.27 94
IV.MML1.EHE. 2020-08-04T18:35:48.01 0.1 undecidable manual P 326 0.2077 50 -0.02 97
IT.MTCL.HGZ. 2020-08-04T18:35:48.62 0.3 undecidable manual S 299 0.1088 132 -0.1 74
IV.CSP1.EHZ. 2020-08-04T18:35:47.21 0.1 undecidable manual P 20 0.161 50 -0.01 98
IV.FEMA.HNZ. 2020-08-04T18:35:47.69 0.3 undecidable manual S 291 0.0621 148 0.14 74
IV.CESI.HHZ. 2020-08-04T18:35:47.50 0.1 undecidable manual P 292 0.1763 50 0.01 98
IV.PF6.EHE. 2020-08-04T18:35:47.76 0.1 undecidable manual P 13 0.2032 50 -0.19 94
IV.MC2.EHZ. 2020-08-04T18:35:47.62 0.1 undecidable manual S 123 0.0522 152 0.26 96
IV.MMO1.EHZ. 2020-08-04T18:35:46.89 0.1 undecidable manual P 106 0.1502 50 -0.15 96
IT.MTCL.HGZ. 2020-08-04T18:35:46.37 0.1 undecidable manual P 299 0.1088 132 0.05 100
IV.FDMO.HHZ. 2020-08-04T18:35:46.22 0.1 undecidable manual P 342 0.1007 134 0.03 100
IV.NRCA.HHZ. 2020-08-04T18:35:46.25 0.1 undecidable manual P 186 0.107 133 -0.04 99
IV.MC2.EHZ. 2020-08-04T18:35:45.77 0.1 undecidable manual P 123 0.0522 152 0.24 97
IV.FEMA.HNZ. 2020-08-04T18:35:45.86 0.1 undecidable manual P 291 0.0621 148 0.22 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.2 0.000172 0.16 AML other m 2020-08-04T18:35:48.53
IV.NRCA.HHN. ML:1.3 0.0001995 0.16 AML other m 2020-08-04T18:35:48.56
IV.FDMO.HHE. ML:0.7 6.003728E-5 0.1792 AML other m 2020-08-04T18:35:48.54
IV.FDMO.HHN. ML:0.6 4.086205E-5 0.1024 AML other m 2020-08-04T18:35:48.84
IV.NRCA.HNE. ML:1.1 0.00015213495 0.1408 AML other m 2020-08-04T18:35:48.46
IV.NRCA.HNN. ML:1.2 0.000162921146 0.0768 AML other m 2020-08-04T18:35:48.49
IV.CSP1.EHE. ML:0.8 5.6500055E-5 0.1792 AML other m 2020-08-04T18:35:50.37
IV.CSP1.EHN. ML:0.6 3.0078495E-5 0.1408 AML other m 2020-08-04T18:35:50.41
IV.CESI.HHE. ML:0.9 5.4651505E-5 0.0896 AML other m 2020-08-04T18:35:51.13
IV.CESI.HHN. ML:1 7.902874E-5 0.0896 AML other m 2020-08-04T18:35:51.01
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