Earthquake with magnitude of ML 1.1 on date 25-10-2021 and time 21:47:12 (Italy) in region 4 km NW Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 4 km NW Visso (MC), on

  • 25-10-2021 19:47:12 (UTC)
  • 25-10-2021 21:47:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.959, 13.053 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
Visso MC 4 1107 1107
Monte Cavallo MC 6 145 1252
Ussita MC 7 444 1696
Preci PG 9 724 2420
Fiordimonte MC 9 202 2622
Pieve Torina MC 10 1458 4080
Castelsantangelo sul Nera MC 11 281 4361
Pievebovigliana MC 12 866 5227
Fiastra MC 12 559 5786
Acquacanina MC 13 121 5907
Sellano PG 13 1079 6986
Muccia MC 14 915 7901
Bolognola MC 15 142 8043
Serravalle di Chienti MC 15 1070 9113
Norcia PG 19 4957 14070
Cerreto di Spoleto PG 19 1075 15145
Camerino MC 20 6974 22119

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
55 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
63 Km NW of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
98 Km NE of Viterbo (67173 inhabitants)
99 Km S of Fano (60888 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 2021-10-25
19:47:12
42.9592 13.0527 11 2021-10-25
19:56:31
Sala Sismica INGV-Roma 96987581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-25 19:47:12 ± 0.05
Latitude 42.9592 ± 0.0027
Longitude 13.0527 ± 0.0025
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 96987581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 296
Semi-minor axis of confidence ellipse (meter) 126
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 30
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.29947
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
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 96987581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-25 19:56:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-10-25T19:47:31.02 3.0 undecidable manual S -0.24 0
IV.MMO1.EHZ. 2021-10-25T19:47:20.55 0.3 undecidable manual S 107 0.2095 50 -0.12 72
IV.CSP1.EHZ. 2021-10-25T19:47:19.57 0.3 undecidable manual S 40 0.1727 50 -0.02 74
IV.MML1.EHZ. 2021-10-25T19:47:19.23 0.3 undecidable manual S 339 0.1655 50 -0.13 72
IV.NRCA.HHZ. 2021-10-25T19:47:18.20 0.3 undecidable manual S 160 0.1331 127 -0.21 72
IV.MF5.EHZ. 2021-10-25T19:47:18.87 0.6 undecidable manual P 84 0.2995 50 0.33 45
IV.CESI.HHZ. 2021-10-25T19:47:17.99 0.3 undecidable manual S 293 0.1178 130 0.06 74
IV.MC2.EHZ. 2021-10-25T19:47:17.82 0.3 undecidable manual S 116 0.1106 132 0.09 74
IV.MMO1.EHZ. 2021-10-25T19:47:16.89 0.3 undecidable manual P 107 0.2095 50 -0.11 72
IV.FEMA.HNE. 2021-10-25T19:47:16.00 0.3 undecidable manual S 325 0.0036 178 0.16 75
IV.MML1.EHZ. 2021-10-25T19:47:16.21 0.1 undecidable manual P 339 0.1655 50 -0.04 99
IV.CSP1.EHZ. 2021-10-25T19:47:16.42 0.3 undecidable manual P 40 0.1727 50 0.04 73
IV.FDMO.HHZ. 2021-10-25T19:47:16.87 0.3 undecidable manual S 18 0.0809 141 -0.08 73
IT.MTCL.HGE. 2021-10-25T19:47:16.12 0.3 undecidable manual S 312 0.0522 152 -0.21 72
IV.MC2.EHZ. 2021-10-25T19:47:15.49 0.3 undecidable manual P 116 0.1106 132 0.18 72
IV.CESI.HHZ. 2021-10-25T19:47:15.55 0.1 undecidable manual P 293 0.1178 130 0.12 97
IV.NRCA.HHZ. 2021-10-25T19:47:15.61 0.1 undecidable manual P 160 0.1331 127 -0.09 98
IV.FDMO.HHZ. 2021-10-25T19:47:14.90 0.1 undecidable manual P 18 0.0809 141 0.04 100
IT.MTCL.HGE. 2021-10-25T19:47:14.53 0.3 undecidable manual P 312 0.0522 152 0.03 75
IV.FEMA.HNE. 2021-10-25T19:47:14.30 0.3 undecidable manual P 325 0.0036 178 0.08 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.2 0.000152 0.2 AML other m 2021-10-25T19:47:18.33
IV.CESI.HHN. ML:1.5 0.0002915 0.22 AML other m 2021-10-25T19:47:18.35
IV.NRCA.HHN. ML:1 9.675E-5 1.06 AML other m 2021-10-25T19:47:18.87
IV.NRCA.HHE. ML:0.9 8.11E-5 0.44 AML other m 2021-10-25T19:47:19.35
IV.MML1.EHN. ML:0.8 4.96E-5 0.18 AML other m 2021-10-25T19:47:19.55
IV.MML1.EHE. ML:0.8 4.655E-5 0.76 AML other m 2021-10-25T19:47:19.56
IV.CSP1.EHE. ML:1.2 0.00010358263 0.1408 AML other m 2021-10-25T19:47:20.36
IV.CSP1.EHN. ML:1.2 0.000128178365 0.1536 AML other m 2021-10-25T19:47:20.28
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