Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 27-02-2020 and time 07:23:09 (UTC) in region 1 km N Norcia (PG)

A magnitude ML 1.8 earthquake occured in region: 1 km N Norcia (PG), on

  • 27-02-2020 07:23:09 (UTC)
  • 27-02-2020 08:23:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8040, 13.0920 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 1 4957 4957
Preci PG 9 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 11 3217 9179
Visso MC 14 1107 10286
Cerreto di Spoleto PG 14 1075 11361
Ussita MC 16 444 11805
Poggiodomo PG 16 117 11922
Sellano PG 16 1079 13001
Arquata del Tronto AP 17 1178 14179
Accumoli RI 18 667 14846
Vallo di Nera PG 19 364 15210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
99 Km W of Pescara (121014 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 2020-02-27
07:23:09		 42.8043 13.092 9 2020-07-18
21:08:23		 Bollettino Sismico Italiano INGV 77046181
Reviewed
Rev100 		ML 1.8 2020-02-27
07:23:10		 42.8063 13.0898 9 2020-02-27
07:32:49		 Sala Sismica INGV-Roma 76862091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-27 07:23:09 ± 0.06
Latitude 42.8043 ± 0.0027
Longitude 13.0920 ± 0.0049
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 77046181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 377
Semi-minor axis of confidence ellipse (meter) 251
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 63
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 40
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.03327
Epicentral distance of station farthest from the epicenter (degree) 0.53600
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 76862091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-27 07:32:49

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 77046181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-26 16:56:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIGS.HHZ. 2020-02-27T07:23:27.11 0.6 undecidable manual S 135 55.3002 50 -0.49 42
IV.MOMA.HHZ. 2020-02-27T07:23:24.88 0.3 undecidable manual S 270 42.5241 50 0.7 60
IV.TERO.HHZ. 2020-02-27T07:23:24.91 0.6 undecidable manual S 116 46.3203 50 -0.3 45
IV.MF5.EHZ. 2020-02-27T07:23:23.25 0.3 undecidable manual S 56 36.1416 50 0.76 59
IV.SAP2.EHZ. 2020-02-27T07:23:23.52 3.0 undecidable manual P 40.9257 5.59 0
IV.CAMP.HHZ. 2020-02-27T07:23:22.99 0.6 undecidable manual S 139 39.4272 50 -0.38 45
IV.GUMA.HHE. 2020-02-27T07:23:22.53 0.6 undecidable manual S 34 34.8429 50 0.4 45
IV.RM33.EHZ. 2020-02-27T07:23:22.25 0.3 undecidable manual S 163 34.2435 50 0.27 69
IV.CSP1.EHZ. 2020-02-27T07:23:21.14 0.6 undecidable manual S 16 33.1446 50 -0.56 43
IV.FIAM.HHZ. 2020-02-27T07:23:21.04 0.1 undecidable manual P 178 59.496 50 0.24 88
IV.SMA1.EHZ. 2020-02-27T07:23:20.03 0.6 undecidable manual S 134 27.6501 108 -0.04 49
IV.MTRA.EHZ. 2020-02-27T07:23:19.41 0.3 undecidable manual S 102 25.3524 110 0.09 73
IV.CESI.HHZ. 2020-02-27T07:23:19.21 0.3 undecidable manual S 326 26.9508 109 -0.63 63
IV.FDMO.HHZ. 2020-02-27T07:23:19.02 0.1 undecidable manual S 359 25.752 110 -0.43 90
IV.GIGS.HHZ. 2020-02-27T07:23:19.86 0.1 undecidable manual P 135 55.3002 50 -0.29 88
IT.MTCL.HGZ. 2020-02-27T07:23:18.13 0.6 undecidable manual S 340 22.3554 112 -0.21 48
IV.T1299.HNN. 2020-02-27T07:23:18.40 0.3 undecidable manual S 141 24.4533 111 -0.61 64
IV.MOMA.HHZ. 2020-02-27T07:23:18.17 0.3 undecidable manual P 270 42.5241 50 0 72
IV.TERO.HHZ. 2020-02-27T07:23:18.53 0.1 undecidable manual P 116 46.3203 50 -0.23 91
IT.GNU.HGN. 2020-02-27T07:23:18.87 3.0 undecidable manual P 42.4242 0.7 0
IV.GAVE.EHZ. 2020-02-27T07:23:17.33 0.3 undecidable manual S 232 20.3685 114 -0.38 69
IV.MF5.EHZ. 2020-02-27T07:23:17.37 0.3 undecidable manual P 56 36.1416 50 0.17 70
IV.MMO1.EHZ. 2020-02-27T07:23:17.89 0.1 undecidable manual S 61 21.867 113 -0.28 94
IV.CAMP.HHZ. 2020-02-27T07:23:17.42 0.1 undecidable manual P 139 39.4272 50 -0.28 91
IV.GUMA.HHE. 2020-02-27T07:23:17.07 0.3 undecidable manual P 34 34.8429 50 0.08 72
IV.PF6.EHN. 2020-02-27T07:23:17.25 0.3 undecidable manual P 13 37.9287 50 -0.22 69
IV.RM33.EHZ. 2020-02-27T07:23:17.17 0.1 undecidable manual P 163 34.2435 50 0.27 92
IV.MML1.HNE. 2020-02-27T07:23:16.92 0.3 undecidable manual P 344 35.6421 50 -0.2 70
IV.MC2.EHZ. 2020-02-27T07:23:16.29 0.1 undecidable manual S 34 14.2746 123 0.44 92
IV.CSP1.EHZ. 2020-02-27T07:23:16.59 0.3 undecidable manual P 16 33.1446 50 -0.15 71
IV.FDMO.HHZ. 2020-02-27T07:23:15.27 0.6 undecidable manual P 359 25.752 110 -0.17 48
IV.SMA1.EHZ. 2020-02-27T07:23:15.68 0.3 undecidable manual P 134 27.6501 108 -0.12 72
IV.T1299.HNN. 2020-02-27T07:23:15.52 0.1 negative manual P 141 24.4533 111 0.33 92
IV.MTRA.EHZ. 2020-02-27T07:23:15.39 0.3 undecidable manual P 102 25.3524 110 0.03 74
IV.CESI.HHZ. 2020-02-27T07:23:15.54 0.3 undecidable manual P 326 26.9508 109 -0.13 72
IT.MTCL.HGZ. 2020-02-27T07:23:14.92 0.1 undecidable manual P 340 22.3554 112 0.12 97
IV.GAVE.EHZ. 2020-02-27T07:23:14.63 0.1 positive manual P 232 20.3685 114 0.2 96
IV.MMO1.EHZ. 2020-02-27T07:23:14.78 0.1 undecidable manual P 61 21.867 113 0.08 98
IV.LNSS.HHZ. 2020-02-27T07:23:14.97 0.1 positive manual P 191 22.755 112 0.1 97
IV.NRCA.HHZ. 2020-02-27T07:23:13.52 0.1 undecidable manual S 29 3.6963 158 0.12 100
IV.MC2.EHZ. 2020-02-27T07:23:13.74 0.1 negative manual P 34 14.2746 123 0.38 93
IV.NRCA.HHZ. 2020-02-27T07:23:12.30 0.1 negative manual P 29 3.6963 158 0.36 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNE. ML:2.0 0.00081880505 0.1216 AML other m 2020-02-27T07:23:18.14
IV.GAVE.EHE. ML:2.0 0.0008192398000000001 0.1216 AML other m 2020-02-27T07:23:18.14
IV.GAVE.EHN. ML:2.0 0.00083623795 0.2016 AML other m 2020-02-27T07:23:18.55
IV.GAVE.HNN. ML:1.5 0.00025154765000000003 0.2304 AML other m 2020-02-27T07:23:18.54
IV.LNSS.HNE. ML:1.8 0.00046782365000000003 0.1888 AML other m 2020-02-27T07:23:18.89
IV.LNSS.HHN. ML:2.1 0.0008199668 1.8208 AML other m 2020-02-27T07:23:19.05
IV.LNSS.HNN. ML:2.0 0.00074179895 0.2976 AML other m 2020-02-27T07:23:19.05
IV.FDMO.HHN. ML:1.5 0.00018912669999999999 0.3008 AML other m 2020-02-27T07:23:19.31
IV.FDMO.HHE. ML:1.6 0.00021608755 0.24 AML other m 2020-02-27T07:23:19.32
IV.LNSS.HHE. ML:1.9 0.0004950491 0.16 AML other m 2020-02-27T07:23:19.27
IV.CESI.HHE. ML:1.4 0.00015300524999999998 0.2592 AML other m 2020-02-27T07:23:19.83
IV.MTRA.EHN. ML:1.9 0.0005454177 0.2016 AML other m 2020-02-27T07:23:19.92
IV.MTRA.HNN. ML:2.0 0.0005543255 0.2016 AML other m 2020-02-27T07:23:19.92
IV.MTRA.EHE. ML:2.0 0.0006528409 1.8208 AML other m 2020-02-27T07:23:19.09
IV.MTRA.HNE. ML:2.0 0.0006482740499999999 1.8112 AML other m 2020-02-27T07:23:19.09
IV.CESI.HHN. ML:1.6 0.00023015969999999998 0.3584 AML other m 2020-02-27T07:23:20.03
IV.CESI.HNN. ML:1.8 0.00030753730000000003 0.3776 AML other m 2020-02-27T07:23:20.22
IV.SMA1.EHE. ML:1.6 0.0002304807 0.2176 AML other m 2020-02-27T07:23:21.84
IV.CSP1.EHN. ML:1.6 0.00018946959999999999 0.4 AML other m 2020-02-27T07:23:22.29
IV.CSP1.EHE. ML:1.8 0.00029215104999999995 0.2784 AML other m 2020-02-27T07:23:22.17
IV.RM33.EHN. ML:1.5 0.0001250034 0.16 AML other m 2020-02-27T07:23:23.57
IV.RM33.HNE. ML:1.7 0.0002003074 0.1984 AML other m 2020-02-27T07:23:23.76
IV.RM33.EHE. ML:1.5 0.00014098935 0.16 AML other m 2020-02-27T07:23:23.77
IV.MF5.EHE. ML:2.0 0.00035335275 0.2208 AML other m 2020-02-27T07:23:23.69
IV.MF5.EHN. ML:1.7 0.00019865325 0.2592 AML other m 2020-02-27T07:23:23.69
IV.SMA1.EHN. ML:1.6 0.0002192558 1.6576 AML other m 2020-02-27T07:23:24.10
IV.TERO.HHE. ML:1.5 0.00009517869 0.16 AML other m 2020-02-27T07:23:25.36
IV.TERO.HHN. ML:1.6 0.000106508945 0.0576 AML other m 2020-02-27T07:23:25.75
IV.MOMA.HHN. ML:1.5 0.00010339036 1.84 AML other m 2020-02-27T07:23:25.00
IV.MOMA.HHE. ML:1.9 0.00028166935000000003 0.1792 AML other m 2020-02-27T07:23:25.93
IV.MOMA.HNE. ML:1.9 0.00026264505 0.1888 AML other m 2020-02-27T07:23:25.85
IV.FIAM.HHN. ML:1.2 0.000029164060000000005 0.4608 AML other m 2020-02-27T07:23:29.66
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