Earthquake with magnitude of ML 1.0 on date 24-09-2021 and time 22:59:11 (Italy) in region Monte Cavallo (MC)

A magnitude ML 1.0 earthquake occured in region: Monte Cavallo (MC), on

  • 24-09-2021 20:59:11 (UTC)
  • 24-09-2021 22:59:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.996, 13.002 at 15 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
Monte Cavallo MC 0 145 145
Pieve Torina MC 7 1458 1603
Fiordimonte MC 9 202 1805
Serravalle di Chienti MC 9 1070 2875
Pievebovigliana MC 10 866 3741
Visso MC 10 1107 4848
Muccia MC 10 915 5763
Ussita MC 13 444 6207
Sellano PG 13 1079 7286
Preci PG 13 724 8010
Fiastra MC 13 559 8569
Acquacanina MC 15 121 8690
Camerino MC 17 6974 15664
Castelsantangelo sul Nera MC 17 281 15945
Sefro MC 17 422 16367
Bolognola MC 18 142 16509

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
51 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
69 Km NW of Teramo (54892 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
94 Km S of Fano (60888 inhabitants)
97 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 1.0 2021-09-24
20:59:11
42.9958 13.0017 15 2021-09-24
21:28:06
Sala Sismica INGV-Roma 95845991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-24 20:59:11 ± 0.11
Latitude 42.9958 ± 0.0054
Longitude 13.0017 ± 0.0086
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95845991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 607
Semi-minor axis of confidence ellipse (meter) 439
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32466
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

Field Value
Value 1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 95845991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-24 21:28:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMUR.HNZ. 2021-09-24T20:59:28.60 3.0 undecidable manual S 0.63 0
IV.ASSB.HHZ. 2021-09-24T20:59:21.54 0.1 undecidable manual S 281 0.2545 103 -0.1 100
IV.NRCA.HHZ. 2021-09-24T20:59:19.61 0.6 undecidable manual S 153 0.1817 112 0.04 51
IV.CSP1.EHZ. 2021-09-24T20:59:19.51 0.6 undecidable manual S 57 0.1763 113 0.08 51
IV.GAVE.EHZ. 2021-09-24T20:59:18.55 0.6 negative manual P 195 0.3139 99 0.2 48
IV.ATCC.EHZ. 2021-09-24T20:59:18.61 0.6 negative manual P 306 0.3247 99 0.07 49
IV.MML1.EHZ. 2021-09-24T20:59:17.77 0.6 undecidable manual S 349 0.1196 127 -0.18 50
IV.ASSB.HHZ. 2021-09-24T20:59:17.41 0.6 undecidable manual P 281 0.2545 103 0.04 50
IV.SNTG.HHZ. 2021-09-24T20:59:17.55 0.6 negative manual P 350 0.2626 102 0.05 50
IV.NRCA.HHZ. 2021-09-24T20:59:16.29 0.3 undecidable manual P 153 0.1817 112 0.12 75
IV.CSP1.EHZ. 2021-09-24T20:59:16.23 1.0 undecidable manual P 57 0.1763 113 0.14 25
IV.CESI.HHZ. 2021-09-24T20:59:16.87 0.6 undecidable manual S 277 0.0719 145 -0.09 52
IV.MMO1.EHZ. 2021-09-24T20:59:16.46 0.6 undecidable manual P 112 0.2563 102 -0.93 37
IV.MC2.EHZ. 2021-09-24T20:59:16.22 1.0 undecidable manual P 122 0.161 116 0.38 24
IV.MML1.EHZ. 2021-09-24T20:59:15.32 0.3 negative manual P 349 0.1196 127 0.09 76
IV.CESI.HHZ. 2021-09-24T20:59:14.81 0.6 undecidable manual P 277 0.0719 145 0.15 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.4 0.000271 0.2 AML other m 2021-09-24T20:59:17.05
IV.CESI.HHN. ML:1.4 0.000264 0.3 AML other m 2021-09-24T20:59:17.25
IV.MML1.EHE. ML:0.9 7.24E-5 0.1 AML other m 2021-09-24T20:59:18.26
IV.MML1.EHN. ML:0.7 4.565E-5 0.68 AML other m 2021-09-24T20:59:18.86
IV.NRCA.HHN. ML:1.1 7.425E-5 0.12 AML other m 2021-09-24T20:59:19.83
IV.NRCA.HHE. ML:1.1 7.6E-5 0.48 AML other m 2021-09-24T20:59:20.09
IV.ASSB.HHN. ML:1 4.285E-5 1.58 AML other m 2021-09-24T20:59:22.03
IV.ASSB.HHE. ML:1 5.01E-5 1.36 AML other m 2021-09-24T20:59:22.10
IV.SNTG.HHE. ML:0.8 2.985E-5 0.1 AML other m 2021-09-24T20:59:22.35
IV.SNTG.HHN. ML:0.8 3.24E-5 0.1 AML other m 2021-09-24T20:59:22.31
IV.GAVE.EHN. ML:0.8 2.675E-5 1.5 AML other m 2021-09-24T20:59:24.06
IV.GAVE.EHE. ML:1 3.785E-5 0.26 AML other m 2021-09-24T20:59:24.22
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