Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 18-11-2020 and time 05:09:52 (UTC) in region 6 km SW Castelsantangelo sul Nera (MC)

A magnitude ML 1.7 earthquake occured in region: 6 km SW Castelsantangelo sul Nera (MC), on

  • 18-11-2020 05:09:52 (UTC)
  • 18-11-2020 06:09:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.85, 13.12 at 8 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
Castelsantangelo sul Nera MC 6 281 281
Preci PG 7 724 1005
Norcia PG 7 4957 5962
Visso MC 9 1107 7069
Ussita MC 10 444 7513
Sellano PG 16 1079 8592
Cerreto di Spoleto PG 17 1075 9667
Cascia PG 17 3217 12884
Arquata del Tronto AP 17 1178 14062
Montegallo AP 18 523 14585
Montemonaco AP 18 604 15189
Monte Cavallo MC 18 145 15334
Bolognola MC 18 142 15476

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
65 Km E of Perugia (166134 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
96 Km NE of Viterbo (67173 inhabitants)
100 Km W of Pescara (121014 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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 2020-11-18
05:09:52		 42.85 13.12 8 2020-11-18
05:39:22		 Sala Sismica INGV-Roma 84818761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-18 05:09:52 ± 0.08
Latitude 42.85 ± 0.00
Longitude 13.12 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84818761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 375
Semi-minor axis of confidence ellipse (meter) 367
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) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.61338
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 17
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 84818761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-18 05:39:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BRSN.EHZ. 2020-11-18T05:10:22.20 0.6 positive manual P 333 1.6134 38 0.36 31
IV.SAMA.EHZ. 2020-11-18T05:10:12.91 3.0 positive manual P -0.98 0
IV.EL6.EHZ. 2020-11-18T05:10:10.04 0.6 undecidable manual S 359 0.4748 50 0.37 44
IV.MNTT.EHZ. 2020-11-18T05:10:09.16 0.6 undecidable manual S 59 0.4083 50 1.46 27
IV.MOMA.HHZ. 2020-11-18T05:10:08.11 0.6 undecidable manual S 263 0.4029 50 0.58 42
IV.TERO.HHZ. 2020-11-18T05:10:07.75 0.6 undecidable manual S 123 0.4272 50 -0.5 43
IV.ASSB.HHZ. 2020-11-18T05:10:06.43 0.6 undecidable manual S 300 0.3831 50 -0.52 43
IV.MF5.EHZ. 2020-11-18T05:10:04.15 0.6 undecidable manual S 62 0.2851 104 0.41 45
IV.SMA1.EHZ. 2020-11-18T05:10:03.24 0.6 undecidable manual S 144 0.2761 104 -0.15 48
IV.LNSS.HHZ. 2020-11-18T05:10:02.64 0.6 undecidable manual S 192 0.2572 105 -0.05 49
IV.MOMA.HHZ. 2020-11-18T05:10:01.75 0.6 negative manual P 263 0.4029 50 0.61 41
IV.EL6.EHZ. 2020-11-18T05:10:01.85 1.0 undecidable manual P 359 0.4748 50 -0.53 21
IV.CESI.HHZ. 2020-11-18T05:10:01.08 0.6 undecidable manual S 314 0.2149 108 -0.06 49
IV.TERO.HHZ. 2020-11-18T05:10:01.01 0.3 undecidable manual P 123 0.4272 50 -0.55 63
IV.OFFI.HHZ. 2020-11-18T05:10:01.93 0.6 positive manual P 79 0.4254 50 0.39 44
IV.MTRA.EHZ. 2020-11-18T05:10:01.58 0.6 undecidable manual S 115 0.2284 107 -0.04 49
IV.MNTT.EHZ. 2020-11-18T05:10:01.56 0.6 positive manual P 59 0.4083 50 0.32 45
IV.CSP1.EHZ. 2020-11-18T05:10:01.92 0.6 undecidable manual S 15 0.2464 106 -0.37 46
IV.ASSB.HHZ. 2020-11-18T05:10:00.24 0.3 positive manual P 300 0.3831 50 -0.57 63
IV.FDMO.HHZ. 2020-11-18T05:09:59.86 0.6 undecidable manual S 354 0.1835 111 -0.12 49
IV.MMO1.EHZ. 2020-11-18T05:09:59.01 0.6 undecidable manual S 74 0.1619 114 -0.2 48
IT.MTCL.HGZ. 2020-11-18T05:09:59.07 0.6 undecidable manual S 329 0.1628 113 -0.19 48
IV.MF5.EHZ. 2020-11-18T05:09:58.93 0.6 positive manual P 62 0.2851 104 -0.03 49
IV.LNSS.HHZ. 2020-11-18T05:09:58.43 0.6 negative manual P 192 0.2572 105 0.08 49
IV.SMA1.EHZ. 2020-11-18T05:09:58.58 0.3 negative manual P 144 0.2761 104 -0.17 71
IV.MTRA.EHZ. 2020-11-18T05:09:57.56 0.1 positive manual P 115 0.2284 107 -0.17 96
IV.CSP1.EHZ. 2020-11-18T05:09:57.87 0.6 negative manual P 15 0.2464 106 -0.25 47
IV.CESI.HHZ. 2020-11-18T05:09:57.42 0.1 positive manual P 314 0.2149 108 -0.04 99
IV.MMO1.EHZ. 2020-11-18T05:09:56.31 1.0 undecidable manual P 74 0.1619 114 -0.03 25
IT.MTCL.HGZ. 2020-11-18T05:09:56.39 0.1 negative manual P 329 0.1628 113 0.02 100
IV.FDMO.HHZ. 2020-11-18T05:09:56.72 0.6 positive manual P 354 0.1835 111 -0.06 49
IV.NRCA.HNZ. 2020-11-18T05:09:55.60 0.6 undecidable manual S 181 0.0207 164 0.35 48
IV.NRCA.HNZ. 2020-11-18T05:09:54.51 0.1 negative manual P 181 0.0207 164 0.46 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:0 0.004895 0.08 AML other m 2020-11-18T05:09:55.70
IV.NRCA.HNE. ML:0 0.010745 0.18 AML other m 2020-11-18T05:09:55.79
IV.NRCA.HHE. ML:0 0.01175 0.16 AML other m 2020-11-18T05:09:55.79
IV.NRCA.HHN. ML:0 0.0048 0.16 AML other m 2020-11-18T05:09:55.82
IV.CESI.HHE. ML:1.9 0.0005145 0.54 AML other m 2020-11-18T05:10:01.21
IV.CESI.HNE. ML:1.9 0.000529 0.16 AML other m 2020-11-18T05:10:01.14
IV.CESI.HHN. ML:2.1 0.0007895 0.3 AML other m 2020-11-18T05:10:01.39
IV.CESI.HNN. ML:2 0.0007415 0.2 AML other m 2020-11-18T05:10:01.39
IV.MTRA.HNE. ML:2 0.000594 1.3 AML other m 2020-11-18T05:10:01.02
IV.MTRA.EHE. ML:2 0.000589 1.3 AML other m 2020-11-18T05:10:01.02
IV.FDMO.HHE. ML:1.4 0.000195 1.32 AML other m 2020-11-18T05:10:01.23
IV.MTRA.HNN. ML:2 0.00057 1.62 AML other m 2020-11-18T05:10:02.10
IV.MTRA.EHN. ML:2 0.0005565 1.62 AML other m 2020-11-18T05:10:02.11
IV.FDMO.HHN. ML:1.3 0.0001555 0.84 AML other m 2020-11-18T05:10:03.64
IV.LNSS.HHN. ML:1.5 0.000168 0.2 AML other m 2020-11-18T05:10:03.31
IV.LNSS.HHE. ML:1.6 0.000204 0.6 AML other m 2020-11-18T05:10:04.30
IV.CSP1.EHN. ML:1.7 0.000303 1.26 AML other m 2020-11-18T05:10:04.08
IV.SMA1.EHN. ML:1.6 0.000175 0.58 AML other m 2020-11-18T05:10:04.47
IV.CSP1.EHE. ML:1.7 0.000272 1.1 AML other m 2020-11-18T05:10:04.67
IV.ASSB.HHE. ML:1.7 0.00016 0.46 AML other m 2020-11-18T05:10:06.26
IV.ASSB.HHN. ML:1.7 0.000158 0.2 AML other m 2020-11-18T05:10:06.65
IV.SMA1.EHE. ML:1.4 0.000127 0.48 AML other m 2020-11-18T05:10:06.98
IV.TERO.HHN. ML:1.7 0.0001445 0.64 AML other m 2020-11-18T05:10:07.77
IV.MOMA.HHN. ML:1.5 8.905E-5 1.84 AML other m 2020-11-18T05:10:08.97
IV.TERO.HHE. ML:1.6 0.0001005 0.5 AML other m 2020-11-18T05:10:09.26
IV.MOMA.HHE. ML:1.6 0.00011345 0.2 AML other m 2020-11-18T05:10:09.43
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