Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 18-05-2020 and time 00:53:23 (Italy) in region 5 km E Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 5 km E Norcia (PG), on

  • 17-05-2020 22:53:23 (UTC)
  • 18-05-2020 00:53:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7800, 13.1550 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 5 4957 4957
Arquata del Tronto AP 12 1178 6135
Accumoli RI 12 667 6802
Castelsantangelo sul Nera MC 13 281 7083
Cascia PG 13 3217 10300
Preci PG 15 724 11024
Montegallo AP 16 523 11547
Visso MC 18 1107 12654
Cittareale RI 18 482 13136
Ussita MC 18 444 13580
Poggiodomo PG 19 117 13697
Montemonaco AP 19 604 14301
Cerreto di Spoleto PG 20 1075 15376
Amatrice RI 20 2657 18033

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)
52 Km NW of L'Aquila (69753 inhabitants)
72 Km SE of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km W of Pescara (121014 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
96 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
Reviewed
Rev100 		ML 1.0 2020-05-17
22:53:23		 42.7802 13.155 10 2020-05-17
22:59:12		 Sala Sismica INGV-Roma 79247301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-17 22:53:23 ± 0.05
Latitude 42.7802 ± 0.0027
Longitude 13.1550 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79247301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 334
Semi-minor axis of confidence ellipse (meter) 176
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 87
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.06115
Epicentral distance of station farthest from the epicenter (degree) 0.42808
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 79247301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-17 22:59:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-05-17T22:53:36.85 0.1 undecidable manual S 115 40.5261 50 0.04 96
IV.ARRO.EHZ. 2020-05-17T22:53:36.58 0.1 undecidable manual S 235 38.8278 50 0.23 92
IV.CSP1.EHZ. 2020-05-17T22:53:35.17 0.1 undecidable manual S 7 34.8429 50 -0.11 95
IV.MF5.EHZ. 2020-05-17T22:53:35.12 0.3 undecidable manual S 47 33.8439 50 0.1 72
IV.CESI.HHZ. 2020-05-17T22:53:34.61 0.1 undecidable manual S 321 32.1456 50 0.03 97
IV.RM33.EHZ. 2020-05-17T22:53:34.20 0.1 undecidable manual S 171 30.4473 50 0.08 97
IV.FDMO.HHZ. 2020-05-17T22:53:33.44 0.1 undecidable manual S 349 28.9488 50 -0.28 93
IV.MNTT.EHZ. 2020-05-17T22:53:32.94 0.1 undecidable manual P 49 47.5191 50 0.77 77
IV.T1299.HNZ. 2020-05-17T22:53:31.07 0.1 undecidable manual S 147 19.2696 117 0.26 95
IV.LNSS.HHZ. 2020-05-17T22:53:31.43 0.1 undecidable manual S 205 21.7671 115 -0.17 96
IV.SMA1.EHZ. 2020-05-17T22:53:31.62 0.1 undecidable manual S 138 22.1556 114 -0.11 97
IV.MF5.EHZ. 2020-05-17T22:53:30.31 0.1 undecidable manual P 47 33.8439 50 0.25 93
IV.ARRO.EHZ. 2020-05-17T22:53:30.73 0.1 undecidable manual P 235 38.8278 50 -0.1 95
IV.TERO.HHZ. 2020-05-17T22:53:30.95 0.1 undecidable manual P 115 40.5261 50 -0.14 94
IV.MMO1.EHZ. 2020-05-17T22:53:30.85 0.1 undecidable manual S 47 19.2696 117 0.04 99
IV.MTRA.EHZ. 2020-05-17T22:53:30.50 0.1 undecidable manual S 97 19.869 117 -0.5 90
IV.FDMO.HHZ. 2020-05-17T22:53:29.04 0.1 undecidable manual P 349 28.9488 50 -0.27 93
IV.RM33.EHZ. 2020-05-17T22:53:29.33 0.1 undecidable manual P 171 30.4473 50 -0.22 94
IV.MC2.EHZ. 2020-05-17T22:53:29.77 0.1 undecidable manual S 11 14.7741 124 0.28 95
IV.CESI.HHZ. 2020-05-17T22:53:29.77 0.1 undecidable manual P 321 32.1456 50 -0.03 97
IV.CSP1.EHZ. 2020-05-17T22:53:29.96 0.1 undecidable manual P 7 34.8429 50 -0.25 93
IV.LNSS.HHZ. 2020-05-17T22:53:28.08 0.1 undecidable manual P 205 21.7671 115 -0.01 99
IV.SMA1.EHZ. 2020-05-17T22:53:28.34 0.1 undecidable manual P 138 22.1556 114 0.18 96
IV.MMO1.EHZ. 2020-05-17T22:53:27.51 0.1 undecidable manual P 47 19.2696 117 -0.12 98
IV.NRCA.HHZ. 2020-05-17T22:53:27.37 0.1 undecidable manual S 331 6.7932 146 -0.11 100
IV.MTRA.EHZ. 2020-05-17T22:53:27.60 0.1 undecidable manual P 97 19.869 117 -0.14 97
IV.T1299.HNZ. 2020-05-17T22:53:27.76 0.1 undecidable manual P 147 19.2696 117 0.13 98
IV.MC2.EHZ. 2020-05-17T22:53:27.00 0.1 undecidable manual P 11 14.7741 124 0.13 98
IV.NRCA.HHZ. 2020-05-17T22:53:25.88 0.1 undecidable manual P 331 6.7932 146 0.17 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.7 0.000818 0.1 AML other m 2020-05-17T22:53:27.37
IV.NRCA.HNN. ML:1.6 0.0006765 0.4 AML other m 2020-05-17T22:53:27.63
IV.NRCA.HNE. ML:1.8 0.000903 0.14 AML other m 2020-05-17T22:53:27.42
IV.NRCA.HHE. ML:1.8 0.000951 0.16 AML other m 2020-05-17T22:53:27.41
IV.MTRA.EHN. ML:1.1 0.00009805 0.22 AML other m 2020-05-17T22:53:31.15
IV.MTRA.EHE. ML:1.2 0.000107 0.2 AML other m 2020-05-17T22:53:31.05
IV.LNSS.HHE. ML:1.2 0.0001003 0.18 AML other m 2020-05-17T22:53:32.16
IV.LNSS.HHN. ML:1.2 0.000101 0.28 AML other m 2020-05-17T22:53:32.32
IV.FDMO.HHN. ML:0.7 0.00002735 1.06 AML other m 2020-05-17T22:53:33.69
IV.SMA1.EHE. ML:0.8 0.000044 1.46 AML other m 2020-05-17T22:53:34.08
IV.FDMO.HHE. ML:0.7 0.0000268 0.68 AML other m 2020-05-17T22:53:34.56
IV.CESI.HHN. ML:1.0 0.00003995 1.58 AML other m 2020-05-17T22:53:35.00
IV.CESI.HHE. ML:0.9 0.00003695 0.42 AML other m 2020-05-17T22:53:35.00
IV.SMA1.EHN. ML:0.8 0.00004435 0.52 AML other m 2020-05-17T22:53:35.58
IV.TERO.HHN. ML:0.6 0.0000125 0.86 AML other m 2020-05-17T22:53:37.90
IV.TERO.HHE. ML:0.6 0.00001515 0.5 AML other m 2020-05-17T22:53:38.38
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