Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 24-01-2021 and time 14:24:13 (UTC) in region 9 km W Monte Cavallo (MC)

A magnitude ML 1.1 earthquake occured in region: 9 km W Monte Cavallo (MC), on

  • 24-01-2021 14:24:13 (UTC)
  • 24-01-2021 15:24:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.99, 12.9 at 10 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Monte Cavallo MC 9 145 145
Serravalle di Chienti MC 10 1070 1215
Sellano PG 12 1079 2294
Valtopina PG 14 1398 3692
Pieve Torina MC 14 1458 5150
Muccia MC 16 915 6065
Nocera Umbra PG 16 5839 11904
Foligno PG 16 57155 69059
Fiordimonte MC 17 202 69261
Visso MC 17 1107 70368
Preci PG 17 724 71092
Pievebovigliana MC 17 866 71958
Trevi PG 17 8469 80427
Sefro MC 18 422 80849
Spello PG 18 8645 89494
Cerreto di Spoleto PG 19 1075 90569

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km E of Foligno (57155 inhabitants)
43 Km E of Perugia (166134 inhabitants)
52 Km NE of Terni (111501 inhabitants)
76 Km W of Teramo (54892 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
95 Km S of Fano (60888 inhabitants)
98 Km SE of Arezzo (99543 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 1.1 2021-01-24
14:24:13		 42.99 12.9 10 2021-01-24
14:30:44		 Sala Sismica INGV-Roma 86532351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-24 14:24:13 ± 0.06
Latitude 42.99 ± 0.01
Longitude 12.90 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86532351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 596
Semi-minor axis of confidence ellipse (meter) 94
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 188
Circular confidence region, given by single value of horizontal uncertainty (meter) 600
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.01439
Epicentral distance of station farthest from the epicenter (degree) 0.2689
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 86532351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-24 14:30:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATCC.EHE. 2021-01-24T14:24:24.06 0.3 undecidable manual S 316 0.2689 50 0.09 72
IV.CSP1.EHZ. 2021-01-24T14:24:23.24 0.1 undecidable manual S 66 0.2464 50 -0.07 97
IV.NRCA.HHZ. 2021-01-24T14:24:22.31 0.3 undecidable manual S 135 0.2248 112 -0.29 70
IV.ASSB.HHZ. 2021-01-24T14:24:20.68 0.1 undecidable manual S 286 0.1808 116 -0.38 92
IT.FOPC.HGZ. 2021-01-24T14:24:20.05 0.3 undecidable manual S 261 0.143 122 0.27 71
IV.FDMO.HHZ. 2021-01-24T14:24:19.88 0.1 undecidable manual S 72 0.1466 121 -0.02 100
IV.CSP1.EHZ. 2021-01-24T14:24:19.02 0.1 undecidable manual P 66 0.2464 50 -0.05 97
IV.ATCC.EHE. 2021-01-24T14:24:19.44 0.1 undecidable manual P 316 0.2689 50 -0.01 98
IV.NRCA.HHZ. 2021-01-24T14:24:18.63 0.1 undecidable manual P 135 0.2248 112 -0.03 98
IV.FDMO.HHZ. 2021-01-24T14:24:17.24 0.1 positive manual P 72 0.1466 121 0.14 98
IT.MTCL.HGE. 2021-01-24T14:24:17.76 0.3 undecidable manual S 88 0.0755 140 -0.03 76
IV.ASSB.HHZ. 2021-01-24T14:24:17.68 0.1 undecidable manual P 286 0.1808 116 -0.09 98
IT.FOPC.HGZ. 2021-01-24T14:24:17.39 0.6 undecidable manual P 261 0.143 122 0.36 47
IV.FEMA.HNE. 2021-01-24T14:24:16.68 0.3 undecidable manual P 105 0.116 128 0.14 74
IV.CESI.HHZ. 2021-01-24T14:24:16.63 0.1 undecidable manual S 25 0.0144 171 -0.14 100
IT.MTCL.HGE. 2021-01-24T14:24:16.08 0.1 undecidable manual P 88 0.0755 140 0.19 98
IV.CESI.HHZ. 2021-01-24T14:24:15.46 0.1 undecidable manual P 25 0.0144 171 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1 7.230551E-5 0.1408 AML other m 2021-01-24T14:24:21.14
IV.ASSB.HHE. ML:0.9 5.2697015E-5 0.16 AML other m 2021-01-24T14:24:20.95
IV.CESI.HHE. ML:1.2 0.0003260585 0.0832 AML other m 2021-01-24T14:24:16.74
IV.CESI.HHN. ML:1.2 0.000326244 0.16 AML other m 2021-01-24T14:24:16.74
IV.CESI.HNE. ML:1.2 0.00028542518 0.0896 AML other m 2021-01-24T14:24:16.74
IV.CESI.HNN. ML:1.3 0.000348221975 0.16 AML other m 2021-01-24T14:24:16.75
IV.FDMO.HHE. ML:0.6 3.7006495E-5 0.1984 AML other m 2021-01-24T14:24:19.95
IV.FDMO.HHN. ML:0.7 4.589974E-5 0.1792 AML other m 2021-01-24T14:24:20.67
IV.NRCA.HHE. ML:1.2 8.5465095E-5 0.0768 AML other m 2021-01-24T14:24:22.63
IV.NRCA.HHN. ML:1.2 9.75854E-5 0.1408 AML other m 2021-01-24T14:24:22.54
IV.NRCA.HNE. ML:1.1 8.1019515E-5 0.192 AML other m 2021-01-24T14:24:22.55
IV.NRCA.HNN. ML:1.2 0.00010354456 0.128 AML other m 2021-01-24T14:24:22.48
IV.CSP1.EHE. ML:1.1 7.2123855E-5 0.4416 AML other m 2021-01-24T14:24:23.69
IV.CSP1.EHN. ML:1 5.95685E-5 0.16 AML other m 2021-01-24T14:24:23.29
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