Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 27-11-2020 and time 12:04:25 (Italy) in region 3 km E Norcia (PG)

A magnitude ML 1.9 earthquake occured in region: 3 km E Norcia (PG), on

  • 27-11-2020 11:04:25 (UTC)
  • 27-11-2020 12:04:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.79, 13.13 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
Norcia PG 3 4957 4957
Castelsantangelo sul Nera MC 12 281 5238
Cascia PG 12 3217 8455
Preci PG 13 724 9179
Arquata del Tronto AP 14 1178 10357
Accumoli RI 14 667 11024
Visso MC 16 1107 12131
Ussita MC 18 444 12575
Montegallo AP 18 523 13098
Cerreto di Spoleto PG 18 1075 14173
Poggiodomo PG 18 117 14290
Cittareale RI 19 482 14772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
47 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)
94 Km E of Viterbo (67173 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
98 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 1.9 2020-11-27
11:04:25		 42.79 13.13 8 2020-11-27
11:14:02		 Sala Sismica INGV-Roma 85049371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-27 11:04:25 ± 0.07
Latitude 42.79 ± 0.00
Longitude 13.13 ± 0.00
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85049371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 428
Semi-minor axis of confidence ellipse (meter) 178
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 261
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.60794
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 51
Type of magnitude ML
Reference to an origin 85049371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-27 11:14:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IT.MMP1.HGE. 2020-11-27T11:04:47.37 0.6 undecidable manual S 208 0.6079 50 0.54 40
IV.EL6.EHZ. 2020-11-27T11:04:44.69 3.0 undecidable manual S -0.82 0
IV.MPAG.EHZ. 2020-11-27T11:04:43.22 3.0 negative manual P 0.1 0
IT.GNU.HGE. 2020-11-27T11:04:41.43 0.6 undecidable manual S 272 0.4128 50 0.37 44
IV.T0110.HHZ. 2020-11-27T11:04:40.22 3.0 positive manual P -0.16 0
IV.SAP2.EHZ. 2020-11-27T11:04:40.24 0.3 undecidable manual S 32 0.3651 50 0.58 62
IV.GUMA.HHZ. 2020-11-27T11:04:38.28 0.3 undecidable manual S 28 0.313 50 0.2 69
IV.TRTR.HHZ. 2020-11-27T11:04:38.34 3.0 undecidable manual P 0.83 0
IV.MF5.EHZ. 2020-11-27T11:04:38.71 0.3 undecidable manual S 50 0.3121 50 0.64 62
IV.MURB.HHZ. 2020-11-27T11:04:38.67 3.0 negative manual P -0.08 0
IV.CSP1.EHZ. 2020-11-27T11:04:37.56 0.3 undecidable manual S 10 0.3085 50 -0.42 66
IT.MMP1.HGE. 2020-11-27T11:04:37.98 0.6 undecidable manual P 208 0.6079 50 0.05 45
IV.CAMP.HHZ. 2020-11-27T11:04:37.79 0.6 undecidable manual S 141 0.3229 50 -0.61 42
IV.EL6.EHZ. 2020-11-27T11:04:36.48 3.0 positive manual P -0.32 0
IV.CESI.HHZ. 2020-11-27T11:04:36.50 0.3 undecidable manual S 323 0.2743 105 -0.23 69
IV.ATCC.EHZ. 2020-11-27T11:04:36.62 3.0 positive manual P -0.02 0
IV.MNTT.EHZ. 2020-11-27T11:04:35.48 3.0 positive manual P 0.55 0
IV.FDMO.HHZ. 2020-11-27T11:04:35.40 0.6 undecidable manual S 352 0.2509 107 -0.48 44
IV.OFFI.HHZ. 2020-11-27T11:04:35.40 3.0 negative manual P 0.54 0
IV.SNTG.HHZ. 2020-11-27T11:04:35.63 3.0 positive manual P -0.14 0
IV.MOMA.HHZ. 2020-11-27T11:04:34.37 3.0 positive manual P 0.06 0
IV.LNSS.HNZ. 2020-11-27T11:04:34.13 0.6 undecidable manual S 200 0.1961 111 0.25 47
IV.SMA1.EHZ. 2020-11-27T11:04:34.26 0.6 undecidable manual S 136 0.2158 109 -0.33 46
IV.ASSB.HHZ. 2020-11-27T11:04:34.48 3.0 positive manual P -0.19 0
IT.MTCL.HGZ. 2020-11-27T11:04:34.95 0.3 undecidable manual S 335 0.2284 108 -0.09 72
IT.GNU.HGE. 2020-11-27T11:04:34.73 0.3 undecidable manual P 272 0.4128 50 0.13 69
IV.ARRO.EHZ. 2020-11-27T11:04:33.08 3.0 negative manual P 0.11 0
IV.MTRA.EHZ. 2020-11-27T11:04:33.77 0.6 undecidable manual S 99 0.1961 111 -0.09 48
IV.CESX.HHZ. 2020-11-27T11:04:33.87 3.0 undecidable manual P -0.92 0
IV.TERO.HHZ. 2020-11-27T11:04:33.55 3.0 negative manual P -0.4 0
IV.MMO1.EHZ. 2020-11-27T11:04:33.30 0.6 undecidable manual S 52 0.1808 113 -0.03 49
IV.SAP2.EHZ. 2020-11-27T11:04:33.84 0.1 undecidable manual P 32 0.3651 50 0.05 94
IV.CSP1.EHZ. 2020-11-27T11:04:32.39 0.1 undecidable manual P 10 0.3085 50 -0.43 88
IV.CAMP.HHZ. 2020-11-27T11:04:32.58 0.3 positive manual P 141 0.3229 50 -0.48 65
IV.GUMA.HHZ. 2020-11-27T11:04:32.76 0.1 undecidable manual P 28 0.313 50 -0.12 94
IV.MC2.EHZ. 2020-11-27T11:04:32.15 0.3 undecidable manual S 18 0.1304 120 0.56 66
IV.MF5.EHZ. 2020-11-27T11:04:32.85 0.1 positive manual P 50 0.3121 50 -0.02 96
IV.FDMO.HHZ. 2020-11-27T11:04:31.37 0.1 undecidable manual P 352 0.2509 107 -0.24 93
IV.CESI.HHZ. 2020-11-27T11:04:31.87 0.1 positive manual P 323 0.2743 105 -0.23 93
IV.SMA1.EHZ. 2020-11-27T11:04:30.85 0.1 undecidable manual P 136 0.2158 109 -0.01 98
IV.MMO1.EHZ. 2020-11-27T11:04:30.08 0.1 positive manual P 52 0.1808 113 -0.06 98
IT.MTCL.HGZ. 2020-11-27T11:04:30.97 0.1 undecidable manual P 335 0.2284 108 -0.16 95
IV.MTRA.EHZ. 2020-11-27T11:04:30.41 0.1 undecidable manual P 99 0.1961 111 -0.03 98
IV.LNSS.HNZ. 2020-11-27T11:04:30.64 0.1 undecidable manual P 200 0.1961 111 0.19 95
IV.MC2.EHZ. 2020-11-27T11:04:29.42 0.1 positive manual P 18 0.1304 120 0.29 94
IV.NRCA.HNZ. 2020-11-27T11:04:29.30 0.1 undecidable manual S 344 0.0486 148 0.07 100
IV.NRCA.HNZ. 2020-11-27T11:04:28.07 0.1 undecidable manual P 344 0.0486 148 0.3 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHE. ML:1.6 0.0001075 0.54 AML other m 2020-11-27T11:04:45.35
IV.NRCA.HHN. ML:3.1 0.0222 0.08 AML other m 2020-11-27T11:04:29.35
IV.NRCA.HNN. ML:3 0.019 0.14 AML other m 2020-11-27T11:04:29.35
IV.NRCA.HHE. ML:3 0.0199 0.16 AML other m 2020-11-27T11:04:29.39
IV.MTRA.EHE. ML:2.5 0.0024 1.68 AML other m 2020-11-27T11:04:33.14
IV.MTRA.HNE. ML:2.5 0.00237 1.68 AML other m 2020-11-27T11:04:33.14
IV.MTRA.HNN. ML:2.5 0.00243 0.34 AML other m 2020-11-27T11:04:34.12
IV.MTRA.EHN. ML:2.5 0.00241 0.34 AML other m 2020-11-27T11:04:34.13
IV.LNSS.HHN. ML:2.8 0.005255 0.18 AML other m 2020-11-27T11:04:34.59
IV.LNSS.HNN. ML:2.8 0.00495 0.18 AML other m 2020-11-27T11:04:34.50
IV.LNSS.HHE. ML:2.8 0.00401 0.32 AML other m 2020-11-27T11:04:34.46
IV.LNSS.HNE. ML:2.8 0.003965 0.32 AML other m 2020-11-27T11:04:34.47
IV.FDMO.HHN. ML:1.8 0.0003725 1.06 AML other m 2020-11-27T11:04:35.74
IV.FDMO.HHE. ML:1.8 0.000374 0.92 AML other m 2020-11-27T11:04:35.32
IV.SMA1.EHE. ML:2 0.0006945 0.5 AML other m 2020-11-27T11:04:37.30
IV.CESI.HHN. ML:2 0.000462 0.9 AML other m 2020-11-27T11:04:37.55
IV.SMA1.EHN. ML:1.9 0.000457 1.38 AML other m 2020-11-27T11:04:37.20
IV.CSP1.EHE. ML:2.4 0.0010365 0.28 AML other m 2020-11-27T11:04:37.87
IV.CSP1.EHN. ML:2.4 0.0010185 1.1 AML other m 2020-11-27T11:04:38.66
IV.CAMP.HHE. ML:1.5 0.0001188 0.58 AML other m 2020-11-27T11:04:38.31
IV.CAMP.HHN. ML:1.3 8.505E-5 0.86 AML other m 2020-11-27T11:04:38.03
IV.CESI.HHE. ML:1.8 0.000313 0.52 AML other m 2020-11-27T11:04:38.25
IV.GUMA.HHE. ML:2.4 0.001002 0.26 AML other m 2020-11-27T11:04:38.84
IV.GUMA.HHN. ML:2.3 0.0007685 0.44 AML other m 2020-11-27T11:04:39.34
IV.ARRO.EHE. ML:1.7 0.0001835 0.84 AML other m 2020-11-27T11:04:40.04
IV.TERO.HHN. ML:1.9 0.000253 0.08 AML other m 2020-11-27T11:04:40.34
IV.ARRO.EHN. ML:1.7 0.0001685 1 AML other m 2020-11-27T11:04:40.10
IV.SAP2.EHN. ML:2.8 0.002355 0.22 AML other m 2020-11-27T11:04:40.87
IV.TERO.HHE. ML:1.8 0.00019 1.84 AML other m 2020-11-27T11:04:40.01
IV.MF5.EHN. ML:1.7 0.0002235 0.6 AML other m 2020-11-27T11:04:41.46
IV.MOMA.HHN. ML:1.8 0.0001935 0.26 AML other m 2020-11-27T11:04:42.07
IV.MOMA.HNN. ML:2.1 0.000353 0.84 AML other m 2020-11-27T11:04:42.07
IV.MF5.EHE. ML:1.8 0.0002405 0.38 AML other m 2020-11-27T11:04:42.57
IV.MOMA.HHE. ML:2 0.000268 0.16 AML other m 2020-11-27T11:04:42.66
IV.MOMA.HNE. ML:2 0.0002775 0.18 AML other m 2020-11-27T11:04:42.75
IV.ASSB.HHE. ML:1.8 0.0001865 0.38 AML other m 2020-11-27T11:04:43.29
IV.SAP2.EHE. ML:2 0.000358 0.44 AML other m 2020-11-27T11:04:43.34
IV.SNTG.HHN. ML:1.6 9.49E-5 0.12 AML other m 2020-11-27T11:04:44.09
IV.SNTG.HHE. ML:1.7 0.0001285 1.42 AML other m 2020-11-27T11:04:44.96
IV.ASSB.HHN. ML:1.8 0.000154 0.32 AML other m 2020-11-27T11:04:44.60
IV.CESX.HHN. ML:1.6 0.000117 0.82 AML other m 2020-11-27T11:04:44.96
IV.EL6.EHN. ML:2.2 0.0003475 1.22 AML other m 2020-11-27T11:04:45.05
IV.OFFI.HHE. ML:1.8 0.0001765 0.16 AML other m 2020-11-27T11:04:45.61
IV.MNTT.EHE. ML:2.1 0.0003515 1 AML other m 2020-11-27T11:04:46.03
IV.ATCC.EHN. ML:1.7 9.575E-5 1.22 AML other m 2020-11-27T11:04:46.22
IV.ATCC.EHE. ML:1.7 9.755E-5 0.62 AML other m 2020-11-27T11:04:46.63
IV.EL6.EHE. ML:2.2 0.0003045 0.16 AML other m 2020-11-27T11:04:46.46
IV.OFFI.HHN. ML:1.9 0.000198 0.26 AML other m 2020-11-27T11:04:46.99
IV.MNTT.EHN. ML:2.1 0.0003385 0.68 AML other m 2020-11-27T11:04:48.69
IV.MURB.HHE. ML:2.1 0.0001845 0.24 AML other m 2020-11-27T11:04:51.27
IV.MURB.HHN. ML:2.1 0.0001885 0.32 AML other m 2020-11-27T11:04:54.51
IV.T0110.HHE. ML:1.6 6.005E-5 0.26 AML other m 2020-11-27T11:04:55.42
IV.MPAG.EHE. ML:1.6 4.28E-5 0.28 AML other m 2020-11-27T11:04:57.47
IV.MPAG.EHN. ML:1.6 4.285E-5 0.5 AML other m 2020-11-27T11:04:58.32
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