Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 09-11-2020 and time 00:47:57 (Italy) in region 5 km N Norcia (PG)

A magnitude ML 0.4 earthquake occured in region: 5 km N Norcia (PG), on

  • 08-11-2020 23:47:57 (UTC)
  • 09-11-2020 00:47:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.83, 13.11 at 9 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 5 4957 4957
Preci PG 7 724 5681
Castelsantangelo sul Nera MC 8 281 5962
Visso MC 11 1107 7069
Ussita MC 13 444 7513
Cascia PG 15 3217 10730
Cerreto di Spoleto PG 16 1075 11805
Sellano PG 16 1079 12884
Arquata del Tronto AP 17 1178 14062
Montegallo AP 19 523 14585
Accumoli RI 19 667 15252
Poggiodomo PG 19 117 15369
Montemonaco AP 20 604 15973
Monte Cavallo MC 20 145 16118

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
66 Km E of Perugia (166134 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
100 Km W of Pescara (121014 inhabitants)
100 Km N of Tivoli (56533 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 0.4 2020-11-08
23:47:57		 42.83 13.11 9 2020-11-08
23:53:11		 Sala Sismica INGV-Roma 84567251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-08 23:47:57 ± 0.09
Latitude 42.83 ± 0.00
Longitude 13.11 ± 0.00
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84567251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 49
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 420
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.0063
Epicentral distance of station farthest from the epicenter (degree) 0.30127
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 84567251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-08 23:53:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-11-08T23:48:07.93 0.6 undecidable manual S 16 0.268 107 -0.26 62
IV.T1299.HNZ. 2020-11-08T23:48:06.80 0.6 undecidable manual S 147 0.2374 109 -0.28 63
IV.MTRA.HNZ. 2020-11-08T23:48:06.33 0.6 undecidable manual S 110 0.2266 109 -0.34 62
IV.GAVE.EHZ. 2020-11-08T23:48:06.00 0.6 undecidable manual S 228 0.2104 111 -0.08 66
IV.CESI.HHZ. 2020-11-08T23:48:06.31 0.6 undecidable manual S 319 0.2257 109 -0.34 62
IV.LNSS.HNZ. 2020-11-08T23:48:06.67 0.6 undecidable manual S 192 0.2356 109 -0.34 62
IV.FDMO.HHZ. 2020-11-08T23:48:05.80 0.6 undecidable manual S 356 0.2032 111 -0.03 66
IV.MMO1.EHZ. 2020-11-08T23:48:04.60 0.6 undecidable manual S 68 0.1745 115 -0.21 64
IV.SMA1.EHZ. 2020-11-08T23:48:04.38 0.3 undecidable manual P 140 0.2635 107 0.83 78
IV.MF5.EHZ. 2020-11-08T23:48:04.38 0.3 undecidable manual P 59 0.3013 50 0.11 96
IV.CSP1.EHZ. 2020-11-08T23:48:03.52 0.3 undecidable manual P 16 0.268 107 -0.12 97
IV.T1299.HNZ. 2020-11-08T23:48:03.06 0.3 undecidable manual P 147 0.2374 109 0.06 98
IV.FEMA.HNZ. 2020-11-08T23:48:03.68 0.6 undecidable manual S 342 0.1349 121 0.22 65
IV.CESI.HHZ. 2020-11-08T23:48:02.78 0.3 undecidable manual P 319 0.2257 109 0.03 99
IV.LNSS.HNZ. 2020-11-08T23:48:02.89 0.3 undecidable manual P 192 0.2356 109 -0.07 98
IV.FDMO.HHZ. 2020-11-08T23:48:02.28 0.3 undecidable manual P 356 0.2032 111 0 100
IV.MC2.EHZ. 2020-11-08T23:48:02.40 0.6 undecidable manual S 38 0.0989 129 0.09 67
IV.MTRA.HNZ. 2020-11-08T23:48:02.54 0.3 undecidable manual P 110 0.2266 109 -0.22 95
IV.GAVE.EHZ. 2020-11-08T23:48:02.48 0.3 undecidable manual P 228 0.2104 111 0.05 99
IV.MMO1.EHZ. 2020-11-08T23:48:01.64 0.3 undecidable manual P 68 0.1745 115 -0.05 100
IV.FEMA.HNZ. 2020-11-08T23:48:00.77 0.3 undecidable manual P 342 0.1349 121 -0.13 99
IV.MC2.EHZ. 2020-11-08T23:48:00.61 0.3 undecidable manual P 38 0.0989 129 0.37 95
IV.NRCA.HHZ. 2020-11-08T23:48:00.55 0.6 undecidable manual S 91 0.0063 176 0.04 69
IV.NRCA.HHZ. 2020-11-08T23:47:59.47 0.3 undecidable manual P 91 0.0063 176 0.26 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:0 0.0002406321 0.128 AML other m 2020-11-08T23:48:00.68
IV.NRCA.HHN. ML:0 0.00026828655 0.1408 AML other m 2020-11-08T23:48:00.70
IV.NRCA.HNE. ML:0 0.00022484435 0.128 AML other m 2020-11-08T23:48:00.68
IV.NRCA.HNN. ML:0 0.00025810645 0.1408 AML other m 2020-11-08T23:48:00.77
IV.FDMO.HHE. ML:0.2 1.192064E-5 0.2688 AML other m 2020-11-08T23:48:06.58
IV.FDMO.HHN. ML:0.4 1.44256615E-5 0.2432 AML other m 2020-11-08T23:48:05.92
IV.GAVE.EHE. ML:0.6 2.298287E-5 0.1408 AML other m 2020-11-08T23:48:07.09
IV.GAVE.EHN. ML:0.5 2.1602173E-5 0.2048 AML other m 2020-11-08T23:48:06.42
IV.CESI.HHE. ML:0.2 1.2493496E-5 0.1664 AML other m 2020-11-08T23:48:07.25
IV.CESI.HHN. ML:0.6 2.680262E-5 0.2944 AML other m 2020-11-08T23:48:07.44
IV.CSP1.EHN. ML:0.7 2.383158E-5 0.1536 AML other m 2020-11-08T23:48:08.95
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