Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 16-11-2020 and time 18:13:23 (Italy) in region 4 km NE Norcia (PG)

A magnitude ML 1.8 earthquake occured in region: 4 km NE Norcia (PG), on

  • 16-11-2020 17:13:23 (UTC)
  • 16-11-2020 18:13:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8260, 13.1240 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 4 4957 4957
Castelsantangelo sul Nera MC 8 281 5238
Preci PG 9 724 5962
Visso MC 12 1107 7069
Ussita MC 13 444 7513
Cascia PG 15 3217 10730
Arquata del Tronto AP 15 1178 11908
Cerreto di Spoleto PG 17 1075 12983
Montegallo AP 17 523 13506
Sellano PG 18 1079 14585
Accumoli RI 18 667 15252
Montemonaco AP 19 604 15856
Poggiodomo PG 20 117 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km N of Tivoli (56533 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.8 2020-11-16
17:13:23		 42.8257 13.1238 10 2021-02-26
14:56:10		 Bollettino Sismico Italiano INGV 85334371
Reviewed
Rev100 		ML 1.9 2020-11-16
17:13:23		 42.8247 13.1232 10 2020-11-16
17:21:44		 Sala Sismica INGV-Roma 84778061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-16 17:13:23 ± 0.04
Latitude 42.8257 ± 0.0018
Longitude 13.1238 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85334371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 256
Semi-minor axis of confidence ellipse (meter) 163
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 61
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
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 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.01079
Epicentral distance of station farthest from the epicenter (degree) 0.50362
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 45
Type of magnitude ML
Reference to an origin 85334371
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-10 11:13:00

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 41
Type of magnitude ML
Reference to an origin 84778061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-16 17:21:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-11-16T17:13:41.60 0.1 undecidable manual S 358 55.8996 50 0.22 87
IV.TERO.HHZ. 2020-11-16T17:13:38.80 0.1 undecidable manual S 120 45.1215 50 0.29 88
IV.ASSB.HHZ. 2020-11-16T17:13:38.20 0.1 undecidable manual S 303 44.8218 50 -0.21 89
IV.CAMP.HHZ. 2020-11-16T17:13:36.90 0.1 undecidable manual S 144 39.7269 50 -0.15 91
IV.GUMA.HHZ. 2020-11-16T17:13:35.10 0.1 undecidable manual S 33 31.4463 50 0.26 90
IV.CSP1.EHZ. 2020-11-16T17:13:34.20 0.1 undecidable manual S 13 30.2475 50 -0.33 89
IV.CESI.HHZ. 2020-11-16T17:13:33.40 0.1 undecidable manual S 318 26.6511 50 -0.18 93
IV.LNSS.HHZ. 2020-11-16T17:13:33.20 0.1 undecidable manual S 195 25.6521 50 -0.1 94
IV.T1299.HNN. 2020-11-16T17:13:33.30 0.1 undecidable manual S 149 24.8529 50 0.21 92
IV.EL6.EHZ. 2020-11-16T17:13:33.97 0.1 positive manual P 358 55.8996 50 0.02 91
IV.SMA1.EHZ. 2020-11-16T17:13:33.70 0.1 undecidable manual S 141 27.6501 50 -0.14 93
IV.MTRA.EHZ. 2020-11-16T17:13:32.30 0.1 undecidable manual S 109 23.4543 113 -0.36 90
IV.MNTT.EHZ. 2020-11-16T17:13:32.77 0.1 undecidable manual P 55 46.4202 50 0.28 88
IV.ASSB.HHZ. 2020-11-16T17:13:32.31 0.1 undecidable manual P 303 44.8218 50 0.08 92
IV.TERO.HHZ. 2020-11-16T17:13:32.05 0.1 undecidable manual P 120 45.1215 50 -0.23 89
IV.GAVE.EHZ. 2020-11-16T17:13:32.80 0.1 undecidable manual S 232 23.8539 113 0.02 96
IV.ARRO.EHZ. 2020-11-16T17:13:31.55 0.1 positive manual P 227 40.0266 50 0.06 93
IT.MTCL.HGZ. 2020-11-16T17:13:31.60 0.1 undecidable manual S 332 21.2676 116 -0.35 90
IV.CAMP.HHZ. 2020-11-16T17:13:31.21 0.1 negative manual P 144 39.7269 50 -0.23 90
IV.GUMA.HHZ. 2020-11-16T17:13:30.35 0.1 positive manual P 33 31.4463 50 0.18 92
IV.FEMA.HNZ. 2020-11-16T17:13:30.40 0.1 undecidable manual S 338 16.2726 122 -0.05 97
IV.MMO1.EHZ. 2020-11-16T17:13:30.80 0.1 undecidable manual S 64 18.4704 119 -0.28 92
IV.T1299.HNN. 2020-11-16T17:13:29.29 0.1 negative manual P 149 24.8529 50 0.13 94
IV.CSP1.EHZ. 2020-11-16T17:13:29.88 0.1 positive manual P 13 30.2475 50 -0.11 93
IV.CESI.HHZ. 2020-11-16T17:13:29.43 0.1 negative manual P 318 26.6511 50 -0.01 96
IV.GAVE.EHZ. 2020-11-16T17:13:29.10 0.1 positive manual P 232 23.8539 113 0.12 94
IV.SMA1.EHZ. 2020-11-16T17:13:29.62 0.1 positive manual P 141 27.6501 50 0.03 96
IV.MC2.EHZ. 2020-11-16T17:13:29.10 0.1 undecidable manual S 29 10.878 133 0.15 96
IV.LNSS.HHZ. 2020-11-16T17:13:29.32 0.1 positive manual P 195 25.6521 50 0.04 96
IV.MTRA.EHZ. 2020-11-16T17:13:28.81 0.1 undecidable manual P 109 23.4543 113 -0.1 95
IT.MTCL.HGZ. 2020-11-16T17:13:28.46 0.1 positive manual P 332 21.2676 116 -0.04 96
IV.MMO1.EHZ. 2020-11-16T17:13:27.98 0.1 positive manual P 64 18.4704 119 -0.02 97
IV.MC2.EHZ. 2020-11-16T17:13:27.11 0.1 negative manual P 29 10.878 133 0.34 92
IV.NRCA.HHZ. 2020-11-16T17:13:27.30 0.1 undecidable manual S 319 1.1988 173 -0.03 100
IV.FEMA.HNZ. 2020-11-16T17:13:27.81 0.1 negative manual P 338 16.2726 122 0.18 95
IV.NRCA.HHZ. 2020-11-16T17:13:26.13 0.1 negative manual P 319 1.1988 173 0.3 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.0 0.00539408 0.1536 AML other m 2020-11-16T17:13:27.48
IV.NRCA.HNN. ML:0.0 0.004955104 0.1664 AML other m 2020-11-16T17:13:27.49
IV.NRCA.HNE. ML:0.0 0.0039509685 0.0896 AML other m 2020-11-16T17:13:28.16
IV.NRCA.HHE. ML:0.0 0.004175010000000001 0.0896 AML other m 2020-11-16T17:13:28.16
IV.FEMA.HNN. ML:0.0 0.0008388061499999999 0.0896 AML other m 2020-11-16T17:13:30.65
IV.FEMA.HNE. ML:0.0 0.0009167265 1.9104 AML other m 2020-11-16T17:13:31.97
IV.MTRA.HNN. ML:0.0 0.00062394485 0.1792 AML other m 2020-11-16T17:13:33.04
IV.MTRA.EHN. ML:0.0 0.0006336864 0.1792 AML other m 2020-11-16T17:13:33.04
IV.GAVE.EHE. ML:0.0 0.00033001715 0.1664 AML other m 2020-11-16T17:13:33.39
IV.GAVE.HNE. ML:1.7 0.00033646874999999996 0.1664 AML other m 2020-11-16T17:13:33.31
IV.CESI.HHE. ML:0.0 0.00036642790000000004 0.1792 AML other m 2020-11-16T17:13:33.59
IV.CESI.HNE. ML:0.0 0.00037653815 0.192 AML other m 2020-11-16T17:13:33.50
IV.MTRA.EHE. ML:0.0 0.0005407096 0.2048 AML other m 2020-11-16T17:13:33.43
IV.MTRA.HNE. ML:0.0 0.00054701975 0.192 AML other m 2020-11-16T17:13:33.44
IV.CESI.HHN. ML:0.0 0.0004744733 0.2432 AML other m 2020-11-16T17:13:33.83
IV.CESI.HNN. ML:0.0 0.00049180535 0.1792 AML other m 2020-11-16T17:13:33.84
IV.LNSS.HHE. ML:0.0 0.00044917415000000004 0.1792 AML other m 2020-11-16T17:13:33.84
IV.LNSS.HNE. ML:0.0 0.0004470176 0.192 AML other m 2020-11-16T17:13:33.84
IV.CSP1.EHE. ML:0.0 0.00053643585 1.7952 AML other m 2020-11-16T17:13:34.95
IV.CSP1.EHN. ML:0.0 0.000591305 1.7952 AML other m 2020-11-16T17:13:35.92
IV.LNSS.HHN. ML:0.0 0.0005051131 0.1792 AML other m 2020-11-16T17:13:35.12
IV.LNSS.HNN. ML:0.0 0.00047882375 0.1792 AML other m 2020-11-16T17:13:35.03
IV.SMA1.EHE. ML:0.0 0.00016274585 0.1152 AML other m 2020-11-16T17:13:35.49
IV.GAVE.HNN. ML:0.0 0.00018365235 0.448 AML other m 2020-11-16T17:13:36.45
IV.GUMA.HHN. ML:0.0 0.00032883870000000005 0.192 AML other m 2020-11-16T17:13:36.67
IV.GAVE.EHN. ML:0.0 0.00022437469999999997 0.2432 AML other m 2020-11-16T17:13:36.68
IV.CAMP.HHN. ML:0.0 0.000053826745 0.3328 AML other m 2020-11-16T17:13:37.21
IV.GUMA.HNE. ML:0.0 0.00031493099999999996 0.2048 AML other m 2020-11-16T17:13:37.38
IV.CAMP.HHE. ML:0.0 0.000041415884999999997 0.1664 AML other m 2020-11-16T17:13:37.70
IV.SMA1.EHN. ML:0.0 0.0001808891 0.384 AML other m 2020-11-16T17:13:37.59
IV.ARRO.EHE. ML:1.1 0.000046229595 0.2048 AML other m 2020-11-16T17:13:38.66
IV.ASSB.HHE. ML:0.0 0.00011304789 0.1792 AML other m 2020-11-16T17:13:38.00
IV.TERO.HHN. ML:0.0 0.00014763135 0.064 AML other m 2020-11-16T17:13:39.16
IV.TERO.HHE. ML:1.6 0.00013248765 0.1152 AML other m 2020-11-16T17:13:39.84
IV.TERO.HNE. ML:1.7 0.00015871423500000002 0.0896 AML other m 2020-11-16T17:13:39.85
IV.ASSB.HHN. ML:1.4 0.00007408102499999999 0.0768 AML other m 2020-11-16T17:13:40.38
IV.GUMA.HHE. ML:0.0 0.0003196295 0.4352 AML other m 2020-11-16T17:13:40.58
IV.GUMA.HNN. ML:0.0 0.00036341857 0.3712 AML other m 2020-11-16T17:13:41.22
IV.MNTT.EHE. ML:1.8 0.00020276506999999998 0.4224 AML other m 2020-11-16T17:13:43.51
IV.ARRO.EHN. ML:1.1 0.000042051165 0.2176 AML other m 2020-11-16T17:13:43.81
IV.EL6.EHN. ML:1.7 0.00010430601 0.1408 AML other m 2020-11-16T17:13:44.22
IV.EL6.EHE. ML:1.7 0.00010320907499999999 0.32 AML other m 2020-11-16T17:13:45.18
IV.MNTT.EHN. ML:1.9 0.00022342195 0.256 AML other m 2020-11-16T17:13:45.52
IV.SAP2.EHE. ML:1.9 0.0002687823 0.1152 AML other m 2020-11-16T17:13:38.25
IV.SAP2.EHN. ML:2.7 0.001914782 0.2176 AML other m 2020-11-16T17:13:37.66
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download