Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 20-10-2020 and time 05:31:42 (UTC) in region 10 km SW Serravalle di Chienti (MC)

A magnitude ML 1.7 earthquake occured in region: 10 km SW Serravalle di Chienti (MC), on

  • 20-10-2020 05:31:42 (UTC)
  • 20-10-2020 07:31:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.01, 12.87 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
Serravalle di Chienti MC 10 1070 1070
Valtopina PG 11 1398 2468
Monte Cavallo MC 11 145 2613
Nocera Umbra PG 13 5839 8452
Sellano PG 14 1079 9531
Foligno PG 15 57155 66686
Pieve Torina MC 15 1458 68144
Spello PG 16 8645 76789
Muccia MC 17 915 77704
Sefro MC 17 422 78126
Trevi PG 18 8469 86595
Fiordimonte MC 18 202 86797
Pievebovigliana MC 19 866 87663
Visso MC 20 1107 88770
Preci PG 20 724 89494

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Foligno (57155 inhabitants)
41 Km E of Perugia (166134 inhabitants)
53 Km NE of Terni (111501 inhabitants)
79 Km NW of Teramo (54892 inhabitants)
85 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
94 Km S of Fano (60888 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
100 Km S of Pesaro (94582 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 1.7 2020-10-20
05:31:42		 43.01 12.87 10 2020-10-20
05:37:19		 Sala Sismica INGV-Roma 83943231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-20 05:31:42 ± 0.04
Latitude 43.01 ± 0.00
Longitude 12.87 ± 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 83943231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 319
Semi-minor axis of confidence ellipse (meter) 144
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 9
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 44
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) 0.31656
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 83943231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-20 05:37:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2020-10-20T05:32:00.88 3.0 undecidable manual S -0.18 0
IV.BADI.EHZ. 2020-10-20T05:31:56.88 3.0 positive manual P 0.48 0
IV.EL6.EHZ. 2020-10-20T05:31:56.72 3.0 undecidable manual S -0.08 0
IV.MPAG.EHZ. 2020-10-20T05:31:55.89 3.0 negative manual P 0.42 0
IV.TERO.HHZ. 2020-10-20T05:31:55.75 3.0 undecidable manual P -0.28 0
IV.NARO.HHZ. 2020-10-20T05:31:55.63 3.0 undecidable manual P -0.06 0
IV.ATPI.EHZ. 2020-10-20T05:31:54.11 3.0 negative manual P -0.08 0
IV.GAVE.EHZ. 2020-10-20T05:31:54.74 0.6 undecidable manual S 177 0.3166 50 -0.09 48
IV.COR1.EHZ. 2020-10-20T05:31:54.98 3.0 negative manual P -0.58 0
IV.MGAB.HHZ. 2020-10-20T05:31:54.20 3.0 negative manual P 0.02 0
IV.MC2.EHZ. 2020-10-20T05:31:53.09 0.6 undecidable manual S 112 0.2536 50 0.13 48
IV.RM33.EHZ. 2020-10-20T05:31:53.68 3.0 undecidable manual P -0.38 0
IV.CSP1.EHZ. 2020-10-20T05:31:53.43 0.6 undecidable manual S 71 0.259 50 0.31 46
IV.ATVO.HHZ. 2020-10-20T05:31:52.97 3.0 positive manual P -0.21 0
IV.MF5.EHZ. 2020-10-20T05:31:52.19 3.0 undecidable manual P 0.37 0
IV.ATCC.EHZ. 2020-10-20T05:31:52.79 0.6 undecidable manual S 317 0.2428 110 0.15 48
IV.MTRA.EHZ. 2020-10-20T05:31:52.13 3.0 positive manual P -0.16 0
IV.SNTG.HHZ. 2020-10-20T05:31:52.67 0.6 undecidable manual S 12 0.2518 50 -0.24 47
IV.SMA1.EHZ. 2020-10-20T05:31:52.99 3.0 undecidable manual P -0.17 0
IV.ARVD.HHZ. 2020-10-20T05:31:52.82 3.0 undecidable manual P -0.18 0
IV.ARRO.EHZ. 2020-10-20T05:31:51.91 3.0 negative manual P 0.18 0
IV.SSFR.HHZ. 2020-10-20T05:31:51.66 3.0 negative manual P -0.23 0
IV.SAP2.EHZ. 2020-10-20T05:31:51.83 3.0 negative manual P 0.63 0
IV.LNSS.HHZ. 2020-10-20T05:31:51.40 3.0 negative manual P -0.14 0
IV.ATFO.HHZ. 2020-10-20T05:31:51.69 3.0 positive manual P 0.07 0
IV.MMO1.EHZ. 2020-10-20T05:31:50.29 3.0 negative manual P -0.01 0
IV.FOSV.EHZ. 2020-10-20T05:31:49.55 3.0 undecidable manual P 0.17 0
IV.FDMO.HHZ. 2020-10-20T05:31:49.84 0.6 undecidable manual S 80 0.1619 118 0.06 50
IV.MOMA.HHZ. 2020-10-20T05:31:49.37 3.0 negative manual P 0.13 0
IV.GAVE.EHZ. 2020-10-20T05:31:49.57 0.3 undecidable manual P 177 0.3166 50 -0.13 71
IV.MURB.HHZ. 2020-10-20T05:31:49.18 3.0 negative manual P -1.29 0
IV.ASSB.HHZ. 2020-10-20T05:31:49.55 0.6 undecidable manual S 283 0.1574 119 -0.07 50
IV.SNTG.HHZ. 2020-10-20T05:31:48.44 0.6 undecidable manual P 12 0.2518 50 -0.15 48
IV.CSP1.EHZ. 2020-10-20T05:31:48.72 0.1 positive manual P 71 0.259 50 0.01 99
IV.MC2.EHZ. 2020-10-20T05:31:48.76 1.0 undecidable manual P 112 0.2536 50 0.14 24
IT.FOPC.HGZ. 2020-10-20T05:31:48.89 0.6 undecidable manual S 252 0.1277 124 0.25 48
IV.ATCC.EHZ. 2020-10-20T05:31:48.42 0.1 negative manual P 317 0.2428 110 -0.01 99
IT.MTCL.HGZ. 2020-10-20T05:31:47.45 0.6 undecidable manual S 99 0.0962 132 -0.25 48
IT.FOPC.HGZ. 2020-10-20T05:31:46.26 1.0 undecidable manual P 252 0.1277 124 0.14 25
IV.ASSB.HHZ. 2020-10-20T05:31:46.66 0.1 positive manual P 283 0.1574 119 -0.03 100
IV.FDMO.HHZ. 2020-10-20T05:31:46.87 0.1 positive manual P 80 0.1619 118 0.09 99
IV.CESI.HHZ. 2020-10-20T05:31:45.16 3.0 undecidable manual S 98 0.0261 163 -1.04 0
IT.MTCL.HGZ. 2020-10-20T05:31:45.59 0.3 undecidable manual P 99 0.0962 132 0.01 76
IV.CESI.HHZ. 2020-10-20T05:31:44.35 1.0 undecidable manual P 98 0.0261 163 -0.37 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HNN. ML:2.2 0.002775 0.42 AML other m 2020-10-20T05:31:45.33
IV.CESI.HHN. ML:2.2 0.00288 0.42 AML other m 2020-10-20T05:31:45.34
IV.CESI.HNE. ML:2.2 0.003355 0.4 AML other m 2020-10-20T05:31:45.41
IV.CESI.HHE. ML:2.3 0.00377 0.4 AML other m 2020-10-20T05:31:45.22
IV.ASSB.HHE. ML:2.2 0.0014805 0.3 AML other m 2020-10-20T05:31:49.70
IV.FDMO.HHE. ML:1.9 0.0007085 0.16 AML other m 2020-10-20T05:31:49.98
IV.ASSB.HHN. ML:2.3 0.00187 0.34 AML other m 2020-10-20T05:31:49.73
IV.FDMO.HHN. ML:1.7 0.0004415 0.46 AML other m 2020-10-20T05:31:49.95
IV.ATCC.EHN. ML:1.8 0.0003695 0.88 AML other m 2020-10-20T05:31:53.04
IV.ATCC.EHE. ML:1.8 0.0003845 0.58 AML other m 2020-10-20T05:31:53.42
IV.CSP1.EHE. ML:2 0.0005965 0.46 AML other m 2020-10-20T05:31:53.59
IV.SNTG.HHE. ML:1.5 0.000153 0.8 AML other m 2020-10-20T05:31:54.43
IV.CSP1.EHN. ML:2 0.000566 1.2 AML other m 2020-10-20T05:31:54.04
IV.SNTG.HHN. ML:1.4 0.0001445 0.6 AML other m 2020-10-20T05:31:54.48
IV.MOMA.HHN. ML:1.8 0.0002605 0.14 AML other m 2020-10-20T05:31:55.37
IV.FOSV.EHN. ML:1.6 0.0001705 0.22 AML other m 2020-10-20T05:31:55.32
IV.MOMA.HHE. ML:1.9 0.0003745 0.48 AML other m 2020-10-20T05:31:55.51
IV.GAVE.EHN. ML:1.8 0.0002535 0.2 AML other m 2020-10-20T05:31:55.71
IV.EL6.EHN. ML:1.8 0.000202 1.22 AML other m 2020-10-20T05:31:56.21
IV.GAVE.EHE. ML:2.1 0.0004755 1.54 AML other m 2020-10-20T05:31:56.16
IV.EL6.EHE. ML:2.1 0.000399 1.74 AML other m 2020-10-20T05:31:57.10
IV.FOSV.EHE. ML:1.5 0.000131 0.44 AML other m 2020-10-20T05:31:57.82
IV.LNSS.HHE. ML:2 0.0003135 0.14 AML other m 2020-10-20T05:31:58.35
IV.LNSS.HHN. ML:2 0.00031 0.22 AML other m 2020-10-20T05:31:58.61
IV.SAP2.EHN. ML:2.6 0.00119 0.16 AML other m 2020-10-20T05:31:59.32
IV.SAP2.EHE. ML:1.8 0.0001955 0.14 AML other m 2020-10-20T05:31:59.25
IV.SSFR.HHE. ML:1.9 0.000233 0.24 AML other m 2020-10-20T05:31:59.58
IV.SSFR.HNE. ML:2 0.0002705 0.2 AML other m 2020-10-20T05:31:59.58
IV.ARRO.EHE. ML:1.6 0.00011 0.18 AML other m 2020-10-20T05:31:59.63
IV.ATFO.HHE. ML:1.4 8.045E-5 0.72 AML other m 2020-10-20T05:31:59.77
IV.ATFO.HHN. ML:1.3 5.43E-5 0.9 AML other m 2020-10-20T05:32:00.04
IV.SSFR.HNN. ML:2 0.0002565 1.22 AML other m 2020-10-20T05:32:00.07
IV.SSFR.HHN. ML:1.8 0.000191 0.54 AML other m 2020-10-20T05:32:00.58
IV.MTRA.EHE. ML:1.8 0.0001615 0.8 AML other m 2020-10-20T05:32:00.49
IV.MTRA.EHN. ML:2 0.000262 0.28 AML other m 2020-10-20T05:32:00.54
IV.ARVD.HHN. ML:1.2 3.745E-5 0.86 AML other m 2020-10-20T05:32:01.58
IV.ARRO.EHN. ML:1.6 0.00010075 0.14 AML other m 2020-10-20T05:32:01.59
IV.ATVO.HHE. ML:1.4 6.115E-5 1.2 AML other m 2020-10-20T05:32:02.86
IV.ARVD.HHE. ML:1.5 7.325E-5 0.5 AML other m 2020-10-20T05:32:02.65
IV.RM33.EHN. ML:1.4 5.53E-5 0.22 AML other m 2020-10-20T05:32:03.64
IV.SMA1.EHN. ML:1.5 7.11E-5 1.2 AML other m 2020-10-20T05:32:03.97
IV.ATVO.HHN. ML:1.4 5.635E-5 0.34 AML other m 2020-10-20T05:32:04.91
IV.SMA1.EHE. ML:1.6 9.245E-5 0.72 AML other m 2020-10-20T05:32:05.01
IV.MGAB.HHN. ML:1.4 5.565E-5 0.38 AML other m 2020-10-20T05:32:05.33
IV.MGAB.HHE. ML:1.4 5.47E-5 0.54 AML other m 2020-10-20T05:32:05.64
IV.RM33.EHE. ML:1.5 5.85E-5 1.44 AML other m 2020-10-20T05:32:05.92
IV.MPAG.EHN. ML:1.1 1.92E-5 0.44 AML other m 2020-10-20T05:32:07.46
IV.ATPI.EHN. ML:1.2 3.55E-5 1.14 AML other m 2020-10-20T05:32:07.08
IV.MPAG.EHE. ML:1.2 2.705E-5 1.26 AML other m 2020-10-20T05:32:08.78
IV.ATPI.EHE. ML:1.2 3.68E-5 0.44 AML other m 2020-10-20T05:32:09.03
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