Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 23-05-2020 and time 17:17:54 (Italy) in region 5 km E Norcia (PG)

A magnitude ML 1.8 earthquake occured in region: 5 km E Norcia (PG), on

  • 23-05-2020 15:17:54 (UTC)
  • 23-05-2020 17:17:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7790, 13.1580 at 9 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 6 4957 4957
Arquata del Tronto AP 11 1178 6135
Accumoli RI 12 667 6802
Castelsantangelo sul Nera MC 13 281 7083
Cascia PG 14 3217 10300
Preci PG 15 724 11024
Montegallo AP 16 523 11547
Cittareale RI 18 482 12029
Visso MC 18 1107 13136
Ussita MC 19 444 13580
Montemonaco AP 19 604 14184
Poggiodomo PG 20 117 14301
Amatrice RI 20 2657 16958

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
48 Km NE of Terni (111501 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
93 Km W of Pescara (121014 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
95 Km NW of Chieti (51815 inhabitants)
98 Km SW of Ancona (100861 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 2020-05-23
15:17:54		 42.7787 13.158 9 2020-11-19
12:36:47		 Bollettino Sismico Italiano INGV 80000811
Reviewed
Rev100 		ML 1.8 2020-05-23
15:17:54		 42.7753 13.1587 10 2020-05-23
15:25:50		 Sala Sismica INGV-Roma 79484031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-23 15:17:54 ± 0.05
Latitude 42.7787 ± 0.0018
Longitude 13.1580 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 80000811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 312
Semi-minor axis of confidence ellipse (meter) 154
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 70
Number of defining phases 67
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.88223
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 34
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 58
Type of magnitude ML
Reference to an origin 79484031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-23 15:25:50

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 80000811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-08 13:37:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PAOL.HHZ. 2020-05-23T15:19:00.28 3.0 undecidable manual Sg 6.82 0
IV.VISG.HHZ. 2020-05-23T15:18:49.06 3.0 undecidable manual Sn -0.35 0
IV.VISG.HHZ. 2020-05-23T15:18:25.30 3.0 undecidable manual Pn 0.23 0
IV.PIEI.HHZ. 2020-05-23T15:18:23.29 0.3 undecidable manual S 329 97.9242 50 0.03 63
IV.ARVD.HHZ. 2020-05-23T15:18:19.62 0.1 undecidable manual S 348 81.7515 50 0.7 73
IV.T0110.HHZ. 2020-05-23T15:18:18.43 0.3 undecidable manual S 140 79.1652 50 0.19 63
IV.VCEL.EHZ. 2020-05-23T15:18:16.07 0.3 undecidable manual S 127 70.1742 50 0.23 64
IV.EL6.EHZ. 2020-05-23T15:18:14.02 0.1 undecidable manual S 356 61.2942 50 0.56 80
IV.ATCC.EHZ. 2020-05-23T15:18:14.15 0.1 undecidable manual S 317 61.6938 50 0.58 79
IV.FIAM.HHZ. 2020-05-23T15:18:12.08 0.1 undecidable manual S 183 56.6988 50 -0.18 88
IV.PIEI.HHZ. 2020-05-23T15:18:11.51 0.1 undecidable manual P 329 97.9242 50 0.54 75
IV.ATMI.HHZ. 2020-05-23T15:18:11.12 0.3 undecidable manual P 311 94.8384 50 0.62 55
IV.CESX.HHZ. 2020-05-23T15:18:10.47 0.1 undecidable manual S 248 50.2164 50 -0.06 92
IT.GNU.HGE. 2020-05-23T15:18:10.54 0.3 undecidable manual S 274 47.9187 50 0.63 60
IV.MOMA.HNZ. 2020-05-23T15:18:10.53 0.3 undecidable manual S 274 47.9187 50 0.62 60
IV.ASSB.HHZ. 2020-05-23T15:18:10.42 0.1 undecidable manual S 306 50.0166 50 -0.04 92
IV.SEF1.HNN. 2020-05-23T15:18:08.69 0.3 undecidable manual S 337 44.3223 50 -0.24 67
IV.SAP2.EHZ. 2020-05-23T15:18:08.76 0.1 undecidable manual S 29 40.3263 50 0.88 73
IV.T0110.HHZ. 2020-05-23T15:18:08.10 0.1 undecidable manual P 140 79.1652 50 0.03 87
IV.ARVD.HHZ. 2020-05-23T15:18:08.46 0.3 undecidable manual P 348 81.7515 50 0 66
IV.MML1.HNE. 2020-05-23T15:18:07.49 0.1 undecidable manual S 338 40.1265 50 -0.33 88
IV.ARRO.EHZ. 2020-05-23T15:18:07.55 0.3 undecidable manual S 235 38.9277 50 0.06 70
IV.TERO.HHZ. 2020-05-23T15:18:07.50 0.1 undecidable manual S 115 40.2264 50 -0.35 88
IV.VCEL.EHZ. 2020-05-23T15:18:07.02 0.3 undecidable manual P 127 70.1742 50 0.33 63
IV.PF6.EHN. 2020-05-23T15:18:07.37 0.1 undecidable manual S 4 39.9267 50 -0.41 87
IV.CSP1.EHZ. 2020-05-23T15:18:06.11 0.1 undecidable manual S 6 34.9428 50 -0.33 89
IV.GUMA.HHZ. 2020-05-23T15:18:06.58 0.1 undecidable manual S 24 34.6431 50 0.22 91
IV.MF5.EHZ. 2020-05-23T15:18:06.86 0.1 undecidable manual S 46 33.744 50 0.74 78
IV.CAMP.HHZ. 2020-05-23T15:18:05.54 0.1 undecidable manual S 143 33.8439 50 -0.6 83
IV.ATCC.EHZ. 2020-05-23T15:18:05.42 0.1 positive manual P 317 61.6938 50 0.05 90
IV.CESI.HHZ. 2020-05-23T15:18:05.51 0.1 undecidable manual S 321 32.4453 50 -0.26 91
IV.EL6.EHZ. 2020-05-23T15:18:05.03 0.1 positive manual P 356 61.2942 50 -0.28 86
IV.FDMO.HHZ. 2020-05-23T15:18:04.33 0.1 undecidable manual S 349 29.1486 107 -0.45 88
IV.RM33.EHZ. 2020-05-23T15:18:04.98 0.1 undecidable manual S 171 30.2475 106 -0.16 93
IV.FIAM.HHZ. 2020-05-23T15:18:04.44 0.1 undecidable manual P 183 56.6988 50 -0.18 88
IT.MTCL.HGZ. 2020-05-23T15:18:03.65 0.3 undecidable manual S 332 27.1506 108 -0.45 66
IV.ASSB.HHZ. 2020-05-23T15:18:03.30 0.1 undecidable manual P 306 50.0166 50 -0.28 88
IV.CESX.HHZ. 2020-05-23T15:18:03.38 0.1 undecidable manual P 248 50.2164 50 -0.24 88
IT.GNU.HGE. 2020-05-23T15:18:03.42 0.3 undecidable manual P 274 47.9187 50 0.16 68
IV.MOMA.HNZ. 2020-05-23T15:18:03.28 0.3 undecidable manual P 274 47.9187 50 0.02 70
IV.SMA1.EHZ. 2020-05-23T15:18:02.46 0.1 undecidable manual S 139 21.867 112 0.07 96
IV.SEF1.HNN. 2020-05-23T15:18:02.13 0.3 undecidable manual P 337 44.3223 50 -0.57 62
IV.FEMA.HNZ. 2020-05-23T15:18:02.32 0.3 undecidable manual S 337 22.1556 112 -0.16 71
IV.LNSS.HHZ. 2020-05-23T15:18:02.52 0.1 undecidable manual S 206 21.7671 112 0.18 94
IV.SAP2.EHZ. 2020-05-23T15:18:02.29 0.1 negative manual P 29 40.3263 50 0.2 91
IV.PF6.EHN. 2020-05-23T15:18:01.63 0.1 undecidable manual P 4 39.9267 50 -0.4 87
IV.MF5.EHZ. 2020-05-23T15:18:01.09 0.1 positive manual P 46 33.744 50 0.01 95
IV.MMO1.EHZ. 2020-05-23T15:18:01.36 0.1 undecidable manual S 46 19.1697 115 -0.17 95
IV.MML1.HNE. 2020-05-23T15:18:01.74 0.1 undecidable manual P 338 40.1265 50 -0.32 89
IV.ARRO.EHZ. 2020-05-23T15:18:01.68 0.3 undecidable manual P 235 38.9277 50 -0.19 68
IV.T1299.EHZ. 2020-05-23T15:18:01.98 0.1 undecidable manual S 148 18.9699 115 0.52 88
IV.MTRA.EHZ. 2020-05-23T15:18:01.51 0.1 undecidable manual S 97 19.5693 115 -0.14 95
IV.TERO.HHZ. 2020-05-23T15:18:01.62 0.1 undecidable manual P 115 40.2264 50 -0.46 86
IV.GUMA.HHZ. 2020-05-23T15:18:01.20 0.1 negative manual P 24 34.6431 50 -0.01 95
IV.MC2.EHZ. 2020-05-23T15:18:00.64 0.1 undecidable manual S 10 14.9739 121 0.41 91
IV.CESI.HHZ. 2020-05-23T15:18:00.65 0.1 undecidable manual P 321 32.4453 50 -0.23 91
IV.CAMP.HHZ. 2020-05-23T15:18:00.71 0.1 undecidable manual P 143 33.8439 50 -0.38 88
IV.CSP1.EHZ. 2020-05-23T15:18:00.94 0.1 positive manual P 6 34.9428 50 -0.32 89
IV.RM33.EHZ. 2020-05-23T15:18:00.30 0.1 undecidable manual P 171 30.2475 106 -0.21 92
IV.FEMA.HNZ. 2020-05-23T15:17:59.00 0.3 undecidable manual P 337 22.1556 112 0.02 73
IV.LNSS.HHZ. 2020-05-23T15:17:59.05 0.1 positive manual P 206 21.7671 112 0.16 95
IT.MTCL.HGZ. 2020-05-23T15:17:59.69 0.3 undecidable manual P 332 27.1506 108 -0.22 69
IV.SMA1.EHZ. 2020-05-23T15:17:59.14 0.1 undecidable manual P 139 21.867 112 0.22 93
IV.FDMO.HHZ. 2020-05-23T15:17:59.98 0.1 positive manual P 349 29.1486 107 -0.32 90
IV.MMO1.EHZ. 2020-05-23T15:17:58.38 0.1 positive manual P 46 19.1697 115 -0.05 97
IV.NRCA.HNZ. 2020-05-23T15:17:58.15 0.1 undecidable manual S 330 7.0929 142 0.01 100
IV.T1299.EHZ. 2020-05-23T15:17:58.79 0.1 positive manual P 148 18.9699 115 0.41 90
IV.MTRA.EHZ. 2020-05-23T15:17:58.48 0.1 undecidable manual P 97 19.5693 115 -0.02 98
IV.MC2.EHZ. 2020-05-23T15:17:57.92 0.1 undecidable manual P 10 14.9739 121 0.25 94
IV.NRCA.HNZ. 2020-05-23T15:17:56.72 0.1 negative manual P 330 7.0929 142 0.25 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.6 0.00021384815 0.2176 AML other m 2020-05-23T15:18:04.58
IV.FDMO.HHE. ML:1.6 0.0001959232 0.2432 AML other m 2020-05-23T15:18:04.45
IV.CESI.HNN. ML:1.8 0.0002629384 0.192 AML other m 2020-05-23T15:18:05.66
IV.RM33.EHN. ML:1.6 0.00020249655 0.1024 AML other m 2020-05-23T15:18:05.73
IV.RM33.HNN. ML:1.6 0.00021059111 0.1152 AML other m 2020-05-23T15:18:05.74
IV.CESI.HHE. ML:1.7 0.00023427615 0.1408 AML other m 2020-05-23T15:18:05.63
IV.CESI.HNE. ML:1.7 0.00023327759999999998 0.128 AML other m 2020-05-23T15:18:05.64
IV.CAMP.HHN. ML:1.3 0.00008184136 0.2176 AML other m 2020-05-23T15:18:05.82
IV.CAMP.HHE. ML:1.4 0.0001126752 0.2176 AML other m 2020-05-23T15:18:05.85
IV.RM33.EHE. ML:1.8 0.00027697915 0.1792 AML other m 2020-05-23T15:18:06.20
IV.RM33.HNE. ML:1.8 0.00028466975 0.1664 AML other m 2020-05-23T15:18:06.20
IV.MF5.EHE. ML:1.9 0.000348 0.28 AML other m 2020-05-23T15:18:07.42
IV.GUMA.HHE. ML:2.2 0.0006931940000000001 0.1664 AML other m 2020-05-23T15:18:07.49
IV.GUMA.HNN. ML:2.2 0.00064724325 0.3584 AML other m 2020-05-23T15:18:07.46
IV.MF5.EHN. ML:1.9 0.00035650000000000005 0.26 AML other m 2020-05-23T15:18:07.74
IV.TERO.HHN. ML:1.7 0.00017327734999999999 0.0768 AML other m 2020-05-23T15:18:07.99
IV.TERO.HNE. ML:1.6 0.00012323081 0.1024 AML other m 2020-05-23T15:18:08.15
IV.ARRO.EHE. ML:1.6 0.00012881605 0.1792 AML other m 2020-05-23T15:18:08.38
IV.TERO.HHE. ML:1.5 0.00011262346500000001 0.1408 AML other m 2020-05-23T15:18:08.68
IV.ASSB.HHE. ML:1.6 0.00011626388 0.1408 AML other m 2020-05-23T15:18:11.28
IV.ATCC.EHN. ML:1.4 0.00005461426 0.2176 AML other m 2020-05-23T15:18:14.46
IV.ATCC.EHE. ML:1.4 0.000057491035000000005 0.1664 AML other m 2020-05-23T15:18:15.22
IV.MTRA.EHE. ML:2.4 0.0019348465 0.1792 AML other m 2020-05-23T15:18:02.05
IV.MTRA.EHN. ML:2.4 0.001907626 0.8064 AML other m 2020-05-23T15:18:02.07
IV.MTRA.HNE. ML:2.4 0.0019380685 0.2176 AML other m 2020-05-23T15:18:02.05
IV.MTRA.HNN. ML:2.4 0.0018483925 0.7936 AML other m 2020-05-23T15:18:02.06
IV.CESI.HHN. ML:1.8 0.00031609955 0.4992 AML other m 2020-05-23T15:18:05.66
IV.CSP1.EHE. ML:1.9 0.00031063975 0.32 AML other m 2020-05-23T15:18:06.56
IV.CSP1.EHN. ML:1.9 0.00032083229999999995 0.32 AML other m 2020-05-23T15:18:06.40
IV.GUMA.HHN. ML:2.3 0.0008934741500000001 0.7424 AML other m 2020-05-23T15:18:07.39
IV.GUMA.HNE. ML:2.2 0.0006443933 0.1792 AML other m 2020-05-23T15:18:07.40
IV.ARRO.EHN. ML:1.5 0.0001198795 0.192 AML other m 2020-05-23T15:18:08.24
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