Earthquake with magnitude of ML 1.1 on date 24-10-2021 and time 18:12:41 (Italy) in region 3 km SW Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 3 km SW Visso (MC), on

  • 24-10-2021 16:12:41 (UTC)
  • 24-10-2021 18:12:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.913, 13.055 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
Visso MC 3 1107 1107
Preci PG 4 724 1831
Ussita MC 8 444 2275
Castelsantangelo sul Nera MC 8 281 2556
Monte Cavallo MC 10 145 2701
Sellano PG 11 1079 3780
Norcia PG 14 4957 8737
Fiordimonte MC 14 202 8939
Pieve Torina MC 15 1458 10397
Cerreto di Spoleto PG 15 1075 11472
Fiastra MC 16 559 12031
Acquacanina MC 16 121 12152
Bolognola MC 17 142 12294
Pievebovigliana MC 17 866 13160
Muccia MC 19 915 14075
Serravalle di Chienti MC 20 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Foligno (57155 inhabitants)
51 Km NE of Terni (111501 inhabitants)
58 Km E of Perugia (166134 inhabitants)
60 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
95 Km NE of Viterbo (67173 inhabitants)
100 Km W of Montesilvano (53738 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-10-24
16:12:41
42.9132 13.0553 7 2021-10-24
16:20:32
Sala Sismica INGV-Roma 96956511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-24 16:12:41 ± 0.13
Latitude 42.9132 ± 0.0036
Longitude 13.0553 ± 0.0061
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 96956511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 433
Semi-minor axis of confidence ellipse (meter) 397
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 43
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30487
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 96956511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-24 16:20:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2021-10-24T16:12:54.35 3.0 undecidable manual S -0.19 0
IV.MF5.EHZ. 2021-10-24T16:12:54.55 0.6 undecidable manual S 76 0.3049 102 0.77 40
IV.CSP1.EHZ. 2021-10-24T16:12:50.17 0.3 undecidable manual S 31 0.2095 107 -0.03 73
IV.MML1.EHZ. 2021-10-24T16:12:50.04 0.3 undecidable manual S 343 0.2095 107 -0.17 72
IV.MMO1.EHZ. 2021-10-24T16:12:49.63 0.6 undecidable manual S 94 0.1996 108 -0.21 47
IV.MF5.EHZ. 2021-10-24T16:12:48.69 1.0 undecidable manual P 76 0.3049 102 -0.02 24
IV.FDMO.HHZ. 2021-10-24T16:12:47.42 0.6 undecidable manual S 11 0.125 117 0.23 50
IV.CESI.HHZ. 2021-10-24T16:12:47.60 0.6 undecidable manual S 310 0.143 114 -0.22 49
IV.NRCA.HHZ. 2021-10-24T16:12:46.11 0.3 undecidable manual S 151 0.0908 125 0.07 76
IT.MTCL.HGZ. 2021-10-24T16:12:46.20 0.6 undecidable manual S 333 0.0908 125 0.17 51
IV.MMO1.EHZ. 2021-10-24T16:12:46.29 0.1 negative manual P 94 0.1996 108 -0.14 97
IV.CSP1.EHZ. 2021-10-24T16:12:46.48 0.3 negative manual P 31 0.2095 107 -0.17 73
IV.MML1.EHZ. 2021-10-24T16:12:46.53 1.0 undecidable manual P 343 0.2095 107 -0.12 25
IV.CESI.HHZ. 2021-10-24T16:12:45.24 0.1 positive manual P 310 0.143 114 -0.03 100
IV.FDMO.HHZ. 2021-10-24T16:12:45.06 0.3 positive manual P 11 0.125 117 0.15 74
IV.NRCA.HHZ. 2021-10-24T16:12:44.27 0.6 undecidable manual P 151 0.0908 125 0.03 51
IT.MTCL.HGZ. 2021-10-24T16:12:44.33 0.1 undecidable manual P 333 0.0908 125 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1 0.000172 1.2 AML other m 2021-10-24T16:12:46.08
IV.NRCA.HHE. ML:1.1 0.0001915 0.58 AML other m 2021-10-24T16:12:47.29
IV.FDMO.HHN. ML:0.8 6.995E-5 0.32 AML other m 2021-10-24T16:12:47.47
IV.FDMO.HHE. ML:0.8 6.75E-5 0.92 AML other m 2021-10-24T16:12:47.02
IV.CESI.HHN. ML:1.2 0.0001675 1.74 AML other m 2021-10-24T16:12:47.90
IV.CESI.HHE. ML:1.1 0.000135 0.18 AML other m 2021-10-24T16:12:47.89
IV.MOMA.HHN. ML:1.1 4.38E-5 0.96 AML other m 2021-10-24T16:12:54.44
IV.MOMA.HHE. ML:1.2 5.315E-5 0.98 AML other m 2021-10-24T16:12:54.37
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