Earthquake with magnitude of ML 1.1 on date 18-10-2021 and time 21:59:29 (Italy) in region 2 km E Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 2 km E Visso (MC), on

  • 18-10-2021 19:59:29 (UTC)
  • 18-10-2021 21:59:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.924, 13.116 at 9 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 4 281 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 15 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
Montegallo AP 20 523 18569
Cerreto di Spoleto PG 20 1075 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
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 2021-10-18
19:59:29
42.9242 13.1163 9 2021-10-18
20:09:08
Sala Sismica INGV-Roma 96735351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 19:59:29 ± 0.05
Latitude 42.9242 ± 0.0027
Longitude 13.1163 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96735351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 291
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 205
Circular confidence region, given by single value of horizontal uncertainty (meter) 290
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 30
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) 0.54859
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 96735351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 20:09:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LAV9.HHZ. 2021-10-18T19:59:52.63 3.0 positive manual P -0.42 0
IV.MURB.HHZ. 2021-10-18T19:59:49.72 0.6 undecidable manual S 308 0.5486 50 1.25 29
IV.EL6.EHZ. 2021-10-18T19:59:44.14 0.3 undecidable manual S 359 0.4047 50 -0.07 70
IV.SMA1.EHZ. 2021-10-18T19:59:42.02 0.3 undecidable manual S 151 0.3345 50 -0.1 70
IV.ASSB.HHZ. 2021-10-18T19:59:42.56 0.3 undecidable manual S 290 0.3552 50 -0.16 69
IV.GAVE.EHZ. 2021-10-18T19:59:40.48 0.3 undecidable manual S 215 0.2833 105 -0.07 71
IV.MURB.HHZ. 2021-10-18T19:59:40.81 0.3 undecidable manual P 308 0.5486 50 0.48 62
IV.MF5.EHZ. 2021-10-18T19:59:40.14 0.3 undecidable manual S 76 0.259 107 0.48 66
IV.TERO.HHZ. 2021-10-18T19:59:39.05 0.3 undecidable manual P 130 0.4676 50 0.1 68
IV.GUMA.HHZ. 2021-10-18T19:59:38.15 0.3 undecidable manual S 49 0.2113 110 0.23 70
IV.ATCC.EHZ. 2021-10-18T19:59:38.27 0.3 undecidable manual P 307 0.4344 50 -0.11 69
IV.MML1.EHZ. 2021-10-18T19:59:37.88 0.3 undecidable manual S 331 0.2167 110 -0.22 70
IV.EL6.EHZ. 2021-10-18T19:59:37.57 0.3 undecidable manual P 359 0.4047 50 -0.31 66
IV.ASSB.HHZ. 2021-10-18T19:59:36.74 0.3 undecidable manual P 290 0.3552 50 -0.28 67
IV.CSP1.EHZ. 2021-10-18T19:59:36.48 0.3 undecidable manual S 21 0.1799 114 -0.3 69
IV.SMA1.EHZ. 2021-10-18T19:59:36.37 0.3 undecidable manual P 151 0.3345 50 -0.3 67
IV.CESI.HHZ. 2021-10-18T19:59:36.83 0.3 undecidable manual S 298 0.1745 114 0.23 70
IV.MF5.EHZ. 2021-10-18T19:59:35.32 0.1 undecidable manual P 76 0.259 107 0.07 95
IV.MMO1.EHZ. 2021-10-18T19:59:35.74 0.3 undecidable manual S 99 0.1565 117 -0.22 71
IV.GAVE.EHZ. 2021-10-18T19:59:35.62 0.3 undecidable manual P 215 0.2833 105 -0.14 70
IV.MML1.EHZ. 2021-10-18T19:59:34.36 0.3 undecidable manual P 331 0.2167 110 0.01 73
IV.FDMO.HHZ. 2021-10-18T19:59:34.33 0.3 undecidable manual S 349 0.1142 124 -0.24 71
IV.GUMA.HHZ. 2021-10-18T19:59:34.34 0.1 undecidable manual P 49 0.2113 110 0.1 96
IV.CSP1.EHZ. 2021-10-18T19:59:33.45 0.1 undecidable manual P 21 0.1799 114 -0.14 96
IV.NRCA.HHZ. 2021-10-18T19:59:33.84 0.1 undecidable manual S 181 0.0908 131 0 100
IV.CESI.HHZ. 2021-10-18T19:59:33.63 0.1 undecidable manual P 298 0.1745 114 0.15 96
IV.MMO1.EHZ. 2021-10-18T19:59:33.05 0.1 undecidable manual P 99 0.1565 117 -0.07 97
IV.FDMO.HHZ. 2021-10-18T19:59:32.32 0.1 undecidable manual P 349 0.1142 124 0.01 99
IV.NRCA.HHZ. 2021-10-18T19:59:32.08 0.1 undecidable manual P 181 0.0908 131 0.19 96
IV.MC2.EHZ. 2021-10-18T19:59:32.84 0.1 undecidable manual S 103 0.0549 145 -0.07 99
IV.MC2.EHZ. 2021-10-18T19:59:31.49 0.1 undecidable manual P 103 0.0549 145 0.14 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.5 0.0004685 0.08 AML other m 2021-10-18T19:59:34.08
IV.FDMO.HHN. ML:0.8 6.38E-5 0.38 AML other m 2021-10-18T19:59:34.61
IV.FDMO.HHE. ML:0.7 5.3997905E-5 0.1792 AML other m 2021-10-18T19:59:34.56
IV.NRCA.HHN. ML:1.4 0.0003310905 0.1024 AML other m 2021-10-18T19:59:34.76
IV.CESI.HHE. ML:1 6.8566515E-5 0.2432 AML other m 2021-10-18T19:59:37.24
IV.CESI.HHN. ML:1.3 0.0001528023 0.1408 AML other m 2021-10-18T19:59:37.13
IV.CSP1.EHN. ML:1.5 0.00024220865 0.2304 AML other m 2021-10-18T19:59:37.24
IV.CSP1.EHE. ML:1.3 0.0001545625 0.2432 AML other m 2021-10-18T19:59:37.24
IV.GUMA.HHE. ML:1.3 0.0001374249 0.1792 AML other m 2021-10-18T19:59:38.37
IV.GUMA.HHN. ML:1.2 8.917923E-5 0.32 AML other m 2021-10-18T19:59:40.79
IV.MML1.EHN. ML:0.6 2.355E-5 0.78 AML other m 2021-10-18T19:59:38.31
IV.MML1.EHE. ML:0.5 2.035E-5 0.72 AML other m 2021-10-18T19:59:39.10
IV.GAVE.EHN. ML:1.3 0.00010164305 0.1664 AML other m 2021-10-18T19:59:41.06
IV.GAVE.EHE. ML:1.3 9.209481E-5 0.1408 AML other m 2021-10-18T19:59:41.70
IV.ASSB.HHE. ML:0.8 2.193575E-5 0.1792 AML other m 2021-10-18T19:59:44.22
IV.ASSB.HHN. ML:0.8 2.47E-5 0.94 AML other m 2021-10-18T19:59:45.87
IV.NRCA.HNE. ML:1.5 0.0004390102 0.0768 AML other m 2021-10-18T19:59:34.08
IV.NRCA.HNN. ML:1.3 0.00030115635 0.0896 AML other m 2021-10-18T19:59:34.76
IV.GUMA.HNE. ML:1.3 0.000128563255 0.4864 AML other m 2021-10-18T19:59:41.52
IV.GUMA.HNN. ML:1.3 0.00013635151 0.5888 AML other m 2021-10-18T19:59:47.16
IV.SMA1.EHE. ML:0.7 2.1423425E-5 9.5232 AML other m 2021-10-18T19:59:42.24
IV.SMA1.EHN. ML:0.7 1.923482E-5 0.32 AML other m 2021-10-18T19:59:46.24
IV.EL6.EHE. ML:0.8 2.13284755E-5 0.1152 AML other m 2021-10-18T19:59:45.15
IV.EL6.EHN. ML:1.2 4.262438E-5 0.2304 AML other m 2021-10-18T19:59:44.92
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download