Earthquake with magnitude of ML 0.7 on date 20-09-2021 and time 10:31:30 (Italy) in region 8 km W Monte Cavallo (MC)

A magnitude ML 0.7 earthquake occured in region: 8 km W Monte Cavallo (MC), on

  • 20-09-2021 08:31:30 (UTC)
  • 20-09-2021 10:31:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.967, 12.916 at 13 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 8 145 145
Sellano PG 9 1079 1224
Serravalle di Chienti MC 12 1070 2294
Preci PG 14 724 3018
Pieve Torina MC 14 1458 4476
Visso MC 15 1107 5583
Fiordimonte MC 16 202 5785
Cerreto di Spoleto PG 16 1075 6860
Muccia MC 17 915 7775
Valtopina PG 17 1398 9173
Trevi PG 17 8469 17642
Foligno PG 17 57155 74797
Pievebovigliana MC 17 866 75663
Ussita MC 18 444 76107
Nocera Umbra PG 19 5839 81946
Campello sul Clitunno PG 20 2442 84388

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Foligno (57155 inhabitants)
46 Km E of Perugia (166134 inhabitants)
50 Km NE of Terni (111501 inhabitants)
73 Km W of Teramo (54892 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
98 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 0.7 2021-09-20
08:31:30
42.9668 12.9163 13 2021-09-20
08:41:51
Sala Sismica INGV-Roma 95657891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-20 08:31:30 ± 0.11
Latitude 42.9668 ± 0.0045
Longitude 12.9163 ± 0.0074
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95657891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 536
Semi-minor axis of confidence ellipse (meter) 345
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 57
Circular confidence region, given by single value of horizontal uncertainty (meter) 540
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 23
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.20325
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 95657891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-20 08:41:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
ST.RONC.EHZ. 2021-09-20T08:33:22.46 3.0 undecidable manual Sg 15.2 0
HL.VLS.HHZ. 2021-09-20T08:33:16.11 3.0 undecidable manual Pn 5.14 0
RF.GEPF.HHZ. 2021-09-20T08:33:02.76 3.0 undecidable manual Sn -2.25 0
IV.PZUN.HHZ. 2021-09-20T08:32:47.52 3.0 undecidable manual Sn 1.41 0
IX.SCL3.EHZ.02 2021-09-20T08:32:45.86 3.0 undecidable manual Sg 4.52 0
CR.STON.BHZ. 2021-09-20T08:32:30.66 3.0 undecidable manual Pg 12.06 0
IX.RSF3.HHZ.02 2021-09-20T08:32:30.76 3.0 undecidable manual Sn -1.54 0
GU.ROTM.HHZ. 2021-09-20T08:32:28.18 3.0 positive manual Pn 2.68 0
IV.ZEN8.EHZ. 2021-09-20T08:32:27.44 3.0 positive manual Pg 10.02 0
IV.CADC.HNZ. 2021-09-20T08:32:21.14 3.0 undecidable manual Pn 2.7 0
IV.AGLI.HHZ. 2021-09-20T08:32:13.53 3.0 undecidable manual Pn -0.47 0
IV.ATMI.HHZ. 2021-09-20T08:31:55.02 3.0 undecidable manual S -0.5 0
IV.PP3.EHZ. 2021-09-20T08:31:41.72 3.0 negative manual P -0.64 0
IV.ASSB.HHZ. 2021-09-20T08:31:39.17 0.3 undecidable manual S 292 0.2032 100 0.15 73
IV.RMP.HHZ. 2021-09-20T08:31:39.33 3.0 undecidable manual P 0
IV.NRCA.HHZ. 2021-09-20T08:31:38.82 0.3 undecidable manual S 133 0.197 101 -0.02 75
IV.MML1.EHZ. 2021-09-20T08:31:37.51 0.3 undecidable manual S 15 0.152 108 -0.04 75
IV.MC2.EHZ. 2021-09-20T08:31:35.79 3.0 undecidable manual S -2.38 0
IV.NRCA.HHZ. 2021-09-20T08:31:35.36 0.3 undecidable manual P 133 0.197 101 0.04 75
IV.ASSB.HHZ. 2021-09-20T08:31:35.22 0.1 undecidable manual P 292 0.2032 100 -0.2 96
IV.MML1.EHZ. 2021-09-20T08:31:34.63 0.1 undecidable manual P 15 0.152 108 0.06 100
IV.CESI.HHZ. 2021-09-20T08:31:34.96 0.3 undecidable manual S 347 0.0387 156 -0.08 76
IV.CESI.HHZ. 2021-09-20T08:31:33.34 0.6 undecidable manual P 347 0.0387 156 0.22 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.2 1.8818203E-5 0.2816 AML other m 2021-09-20T08:31:39.12
IV.CESI.HHN. ML:0 1.72622295E-5 0.6784 AML other m 2021-09-20T08:31:33.09
IV.CESI.HNE. ML:1 0.00014954015 1.2992 AML other m 2021-09-20T08:31:45.68
IV.CESI.HNN. ML:1.2 0.000192833665 0.5248 AML other m 2021-09-20T08:31:39.11
IV.MML1.EHE. ML:0.4 2.01895355E-5 0.1152 AML other m 2021-09-20T08:31:37.88
IV.MML1.EHN. ML:0.5 2.4524116E-5 0.16 AML other m 2021-09-20T08:31:37.79
IV.MML1.HNE. ML:1.2 0.00011543125 0.6656 AML other m 2021-09-20T08:31:45.59
IV.MML1.HNN. ML:1.1 0.0001041622 0.8576 AML other m 2021-09-20T08:31:35.12
IV.ASSB.HHE. ML:0.7 2.94667E-5 0.8384 AML other m 2021-09-20T08:31:46.82
IV.ASSB.HHN. ML:0.5 2.24214866575E-5 47.0592 AML other m 2021-09-20T08:31:34.69
IV.NRCA.HHE. ML:0.4 1.6118635E-5 0.6784 AML other m 2021-09-20T08:31:35.05
IV.NRCA.HHN. ML:0.4 1.265883E-5 0.1408 AML other m 2021-09-20T08:31:39.88
IV.NRCA.HNE. ML:1.3 0.0001264721 0.8192 AML other m 2021-09-20T08:31:50.05
IV.NRCA.HNN. ML:1.5 0.0001908574 1.1392 AML other m 2021-09-20T08:31:41.56
IV.RMP.HHE. ML:2.9 0.00047065235 0.1216 AML other m 2021-09-20T08:32:11.76
IV.RMP.HHN. ML:2.9 0.00053502265 0.3392 AML other m 2021-09-20T08:32:09.42
IV.PP3.HNE. ML:2.3 0.00030577987 0.0704 AML other m 2021-09-20T08:31:45.22
IV.PP3.HNN. ML:2.2 0.000243526815 0.2624 AML other m 2021-09-20T08:31:47.26
IV.PP3.EHE. ML:2.1 0.0002219204 0.8768 AML other m 2021-09-20T08:32:11.31
IV.PP3.EHN. ML:2.2 0.00026882145 0.3776 AML other m 2021-09-20T08:31:53.26
IV.AGLI.HHE. ML:3.1 9.216924E-5 2.5792 AML other m 2021-09-20T08:33:08.10
IV.AGLI.HHN. ML:3 6.665266E-5 2.4576 AML other m 2021-09-20T08:32:50.01
IV.CADC.HNE. ML:3.5 0.000240530875 0.3584 AML other m 2021-09-20T08:33:39.39
IV.CADC.HNN. ML:3.6 0.00029432755 0.3328 AML other m 2021-09-20T08:33:09.69
IV.CADC.EHE. ML:3.5 0.00023581 0.1984 AML other m 2021-09-20T08:33:39.87
IV.CADC.EHN. ML:3.5 0.000257253 0.5376 AML other m 2021-09-20T08:32:35.28
GU.ROTM.HHE. ML:3.9 0.00040824145 0.0576 AML other m 2021-09-20T08:32:55.48
GU.ROTM.HHN. ML:4 0.0004582387 0.0768 AML other m 2021-09-20T08:32:59.16
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