Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 17-11-2020 and time 08:45:38 (Italy) in region 3 km E Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 3 km E Norcia (PG), on

  • 17-11-2020 07:45:38 (UTC)
  • 17-11-2020 08:45:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.13 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Norcia PG 3 4957 4957
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 11 724 5962
Cascia PG 13 3217 9179
Arquata del Tronto AP 14 1178 10357
Visso MC 15 1107 11464
Accumoli RI 15 667 12131
Ussita MC 16 444 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Poggiodomo PG 19 117 14290
Sellano PG 19 1079 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
96 Km W of Pescara (121014 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
99 Km NW of Chieti (51815 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 2020-11-17
07:45:38		 42.8 13.13 10 2020-11-17
07:57:27		 Sala Sismica INGV-Roma 84796181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-17 07:45:38 ± 0.06
Latitude 42.80 ± 0.00
Longitude 13.13 ± 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 84796181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 390
Semi-minor axis of confidence ellipse (meter) 380
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 249
Circular confidence region, given by single value of horizontal uncertainty (meter) 390
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.5288
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 84796181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-17 07:57:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
CR.STON.BHZ. 2020-11-17T07:47:15.80 3.0 undecidable manual Sn 9.81 0
IV.CMPR.HHZ. 2020-11-17T07:47:14.83 3.0 undecidable manual Sg 14.16 0
IV.CADC.HNZ. 2020-11-17T07:46:57.29 3.0 undecidable manual Sn -0.14 0
IV.CDRU.HHZ. 2020-11-17T07:46:57.13 3.0 undecidable manual Sn -0.03 0
MN.CLTB.HHZ. 2020-11-17T07:46:47.49 3.0 negative manual Pn -5.86 0
IV.MTGR.HHZ. 2020-11-17T07:46:43.90 3.0 positive manual Pn -5.12 0
IV.SARZ.HHZ. 2020-11-17T07:46:34.90 3.0 positive manual Pg 9.88 0
CH.BERNI.HHZ. 2020-11-17T07:46:32.29 3.0 undecidable manual Pn 0.26 0
IV.MNTV.HNZ. 2020-11-17T07:46:23.39 3.0 undecidable manual Pg 9.78 0
CR.ZAG.BHZ. 2020-11-17T07:46:22.54 3.0 undecidable manual Pn -3.45 0
IV.MRB1.HHZ. 2020-11-17T07:46:22.93 3.0 negative manual Pg 11.28 0
IV.NDIM.HNZ. 2020-11-17T07:46:18.20 3.0 positive manual Pg 8.06 0
IV.FIR.HHZ. 2020-11-17T07:46:17.90 3.0 undecidable manual Sg 2.11 0
IV.POFI.HHZ. 2020-11-17T07:46:16.96 3.0 undecidable manual Sn 0.24 0
IV.CRND.HNZ. 2020-11-17T07:46:15.58 3.0 undecidable manual Pn -1.38 0
IV.PTRJ.HNZ. 2020-11-17T07:46:08.52 3.0 undecidable manual Pn 2.2 0
IV.RIBO.EHZ.01 2020-11-17T07:46:00.55 3.0 positive manual Pg 3.23 0
IV.BRSN.HNZ. 2020-11-17T07:45:58.21 3.0 undecidable manual Pg 1.49 0
IV.MF5.EHZ. 2020-11-17T07:45:51.01 0.3 undecidable manual S 52 0.3058 50 0.82 58
IV.GUMA.HHZ. 2020-11-17T07:45:50.42 0.3 undecidable manual S 30 0.3022 50 0.34 68
IV.CSP1.EHZ. 2020-11-17T07:45:49.61 0.3 undecidable manual S 11 0.2959 50 -0.3 69
IV.CESI.HHZ. 2020-11-17T07:45:48.80 0.3 undecidable manual S 321 0.2626 50 -0.11 72
IV.EL6.EHZ. 2020-11-17T07:45:48.91 0.6 undecidable manual P 358 0.5288 50 -0.14 45
IV.LNSS.HHZ. 2020-11-17T07:45:47.35 0.3 undecidable manual S 198 0.2086 113 0.15 72
IV.SMA1.EHZ. 2020-11-17T07:45:47.64 0.3 undecidable manual S 138 0.2275 112 -0.23 71
IV.GAVE.EHE. 2020-11-17T07:45:47.25 0.6 undecidable manual S 238 0.2041 114 0.2 48
IV.FDMO.HHZ. 2020-11-17T07:45:47.81 0.3 undecidable manual S 352 0.2374 50 -0.37 69
IV.MTRA.EHZ. 2020-11-17T07:45:46.60 0.3 undecidable manual S 103 0.2005 114 -0.32 70
IV.TERO.HHZ. 2020-11-17T07:45:46.43 0.6 undecidable manual P 117 0.3912 50 -0.26 46
IV.GUMA.HHZ. 2020-11-17T07:45:45.29 0.1 undecidable manual P 30 0.3022 50 0.12 95
IV.MF5.EHZ. 2020-11-17T07:45:45.44 0.3 undecidable manual P 52 0.3058 50 0.21 70
IV.MMO1.EHZ. 2020-11-17T07:45:45.81 0.3 undecidable manual S 56 0.1745 117 -0.21 72
IV.CESI.HHZ. 2020-11-17T07:45:44.47 0.3 undecidable manual P 321 0.2626 50 -0.02 74
IV.MC2.EHZ. 2020-11-17T07:45:44.60 0.3 undecidable manual S 21 0.1187 127 0.4 70
IV.CSP1.EHZ. 2020-11-17T07:45:44.88 0.3 undecidable manual P 11 0.2959 50 -0.19 71
IV.SMA1.EHZ. 2020-11-17T07:45:43.82 0.3 undecidable manual P 138 0.2275 112 -0.07 73
IV.GAVE.EHE. 2020-11-17T07:45:43.44 0.3 undecidable manual P 238 0.2041 114 0.03 74
IV.FDMO.HHZ. 2020-11-17T07:45:43.80 0.3 undecidable manual P 352 0.2374 50 -0.27 70
IV.MTRA.EHZ. 2020-11-17T07:45:43.57 0.3 undecidable manual P 103 0.2005 114 0.23 71
IV.LNSS.HHZ. 2020-11-17T07:45:43.61 0.3 undecidable manual P 198 0.2086 113 0.11 73
IV.MMO1.EHZ. 2020-11-17T07:45:42.61 0.1 undecidable manual P 56 0.1745 117 -0.21 96
IV.NRCA.HNZ. 2020-11-17T07:45:42.02 0.1 undecidable manual S 341 0.0351 159 -0.16 100
IV.MC2.EHZ. 2020-11-17T07:45:41.92 0.1 positive manual P 21 0.1187 127 0.15 98
IV.NRCA.HNZ. 2020-11-17T07:45:40.74 0.1 undecidable manual P 341 0.0351 159 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.4 0.0042 0.16 AML other m 2020-11-17T07:45:42.11
IV.NRCA.HHN. ML:2.4 0.00461 0.12 AML other m 2020-11-17T07:45:42.11
IV.NRCA.HHE. ML:2.2 0.00272 0.62 AML other m 2020-11-17T07:45:42.17
IV.NRCA.HNE. ML:2.2 0.002635 0.18 AML other m 2020-11-17T07:45:42.17
IV.LNSS.HHE. ML:1.9 0.000529 0.12 AML other m 2020-11-17T07:45:47.84
IV.LNSS.HHN. ML:1.9 0.0004655 0.54 AML other m 2020-11-17T07:45:47.81
IV.FDMO.HHN. ML:1.4 0.000149 0.92 AML other m 2020-11-17T07:45:47.91
IV.FDMO.HHE. ML:1.4 0.000135 0.92 AML other m 2020-11-17T07:45:48.29
IV.CESI.HHN. ML:1.7 0.00026 1.76 AML other m 2020-11-17T07:45:48.02
IV.CESI.HHE. ML:1.5 0.000158 1.62 AML other m 2020-11-17T07:45:48.93
IV.MTRA.HNE. ML:1.3 0.00014433675 0.3264 AML other m 2020-11-17T07:45:48.56
IV.MTRA.HNN. ML:1.4 0.00017304373 0.2688 AML other m 2020-11-17T07:45:47.36
IV.SMA1.EHE. ML:1.4 0.000133284 0.48 AML other m 2020-11-17T07:45:50.34
IV.SMA1.EHN. ML:1.2 0.00010031021 0.2368 AML other m 2020-11-17T07:45:51.19
IV.CSP1.EHE. ML:1.8 0.00025111844 0.1216 AML other m 2020-11-17T07:45:50.68
IV.CSP1.EHN. ML:1.8 0.00030068855 0.16 AML other m 2020-11-17T07:45:50.31
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