Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 24-11-2020 and time 05:35:28 (Italy) in region 3 km SE Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 3 km SE Norcia (PG), on

  • 24-11-2020 04:35:28 (UTC)
  • 24-11-2020 05:35:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.78, 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.

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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
Norcia PG 3 4957 4957
Cascia PG 11 3217 8174
Castelsantangelo sul Nera MC 13 281 8455
Preci PG 13 724 9179
Accumoli RI 14 667 9846
Arquata del Tronto AP 14 1178 11024
Visso MC 17 1107 12131
Poggiodomo PG 17 117 12248
Cerreto di Spoleto PG 18 1075 13323
Cittareale RI 18 482 13805
Montegallo AP 18 523 14328
Ussita MC 19 444 14772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SE of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
70 Km SE of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
96 Km W of Pescara (121014 inhabitants)
98 Km W of Chieti (51815 inhabitants)
99 Km SW of Ancona (100861 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 1.2 2020-11-24
04:35:28		 42.78 13.13 10 2020-11-24
04:42:51		 Sala Sismica INGV-Roma 84975961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-24 04:35:28 ± 0.08
Latitude 42.78 ± 0.01
Longitude 13.13 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84975961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 662
Semi-minor axis of confidence ellipse (meter) 464
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 136
Circular confidence region, given by single value of horizontal uncertainty (meter) 660
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 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.05486
Epicentral distance of station farthest from the epicenter (degree) 0.54949
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 84975961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-24 04:42:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2020-11-24T04:35:43.82 0.3 undecidable manual S 274 0.4092 50 0.43 67
IV.MF5.EHZ. 2020-11-24T04:35:41.39 0.3 undecidable manual S 49 0.3211 50 0.62 64
IV.GUMA.HHZ. 2020-11-24T04:35:41.12 0.3 undecidable manual S 28 0.322 50 0.32 69
IV.CSP1.EHZ. 2020-11-24T04:35:40.49 0.6 undecidable manual S 10 0.3175 50 -0.19 48
IV.CESI.HHZ. 2020-11-24T04:35:39.25 0.3 undecidable manual S 324 0.2779 50 -0.25 71
IV.EL6.EHZ. 2020-11-24T04:35:39.36 0.1 undecidable manual P 358 0.5495 50 -0.14 92
IV.FDMO.HHZ. 2020-11-24T04:35:38.56 0.6 undecidable manual S 354 0.2581 50 -0.37 46
IV.MOMA.HHZ. 2020-11-24T04:35:37.35 0.1 undecidable manual P 274 0.4092 50 0.26 92
IV.MMO1.EHZ. 2020-11-24T04:35:36.29 0.3 undecidable manual S 51 0.1898 114 -0.21 73
IV.LNSS.HHZ. 2020-11-24T04:35:36.33 0.6 undecidable manual S 200 0.1871 115 -0.1 50
IV.GUMA.HHZ. 2020-11-24T04:35:35.66 0.1 undecidable manual P 28 0.322 50 0.07 98
IV.MF5.EHZ. 2020-11-24T04:35:35.81 0.1 undecidable manual P 49 0.3211 50 0.23 94
IV.CSP1.EHZ. 2020-11-24T04:35:35.25 0.1 undecidable manual P 10 0.3175 50 -0.27 93
IV.FDMO.HHZ. 2020-11-24T04:35:34.20 0.1 undecidable manual P 354 0.2581 50 -0.32 94
IV.CESI.HHZ. 2020-11-24T04:35:34.57 0.1 undecidable manual P 324 0.2779 50 -0.28 94
IV.LNSS.HHZ. 2020-11-24T04:35:33.00 0.1 undecidable manual P 200 0.1871 115 -0.07 100
IV.MMO1.EHZ. 2020-11-24T04:35:33.02 0.6 undecidable manual P 51 0.1898 114 -0.09 50
IV.SMA1.EHZ. 2020-11-24T04:35:33.37 0.1 undecidable manual P 134 0.214 112 -0.23 96
IV.NRCA.HNZ. 2020-11-24T04:35:32.65 0.3 undecidable manual S 350 0.0549 148 0.23 74
IV.NRCA.HNZ. 2020-11-24T04:35:31.08 0.1 negative manual P 350 0.0549 148 0.33 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2 0.00168 0.14 AML other m 2020-11-24T04:35:32.77
IV.NRCA.HNN. ML:2 0.001475 0.14 AML other m 2020-11-24T04:35:32.77
IV.NRCA.HHE. ML:1.9 0.001305 0.16 AML other m 2020-11-24T04:35:32.78
IV.NRCA.HNE. ML:1.9 0.001285 0.16 AML other m 2020-11-24T04:35:32.78
IV.SMA1.EHE. ML:1.1 8.005E-5 0.66 AML other m 2020-11-24T04:35:38.35
IV.SMA1.EHN. ML:1.1 8.505E-5 1.8 AML other m 2020-11-24T04:35:38.03
IV.MOMA.HHE. ML:1.3 6.1E-5 0.18 AML other m 2020-11-24T04:35:45.01
IV.MOMA.HHN. ML:1.1 4.115E-5 0.2 AML other m 2020-11-24T04:35:45.22
IV.LNSS.HHE. ML:1.2 0.00010916914 0.0992 AML other m 2020-11-24T04:35:38.30
IV.LNSS.HHN. ML:1.2 0.000114917075 0.1984 AML other m 2020-11-24T04:35:36.86
IV.FDMO.HHE. ML:0.8 3.2940105E-5 0.16 AML other m 2020-11-24T04:35:42.25
IV.FDMO.HHN. ML:0.8 3.1237239E-5 0.1216 AML other m 2020-11-24T04:35:40.50
IV.CESI.HHE. ML:0.9 3.3127625E-5 0.0992 AML other m 2020-11-24T04:35:39.73
IV.CESI.HHN. ML:1 4.617682E-5 0.1984 AML other m 2020-11-24T04:35:40.01
IV.GUMA.HHE. ML:1.4 0.000108387065 0.2816 AML other m 2020-11-24T04:35:41.73
IV.GUMA.HHN. ML:1.3 8.728419E-5 0.2784 AML other m 2020-11-24T04:35:42.58
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