Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 27-02-2020 and time 01:43:31 (Italy) in region 2 km NW Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 2 km NW Norcia (PG), on

  • 27-02-2020 00:43:31 (UTC)
  • 27-02-2020 01:43:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8080, 13.0840 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 2 4957 4957
Preci PG 9 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 14 1107 10286
Cerreto di Spoleto PG 14 1075 11361
Sellano PG 16 1079 12440
Ussita MC 16 444 12884
Poggiodomo PG 16 117 13001
Arquata del Tronto AP 18 1178 14179
Accumoli RI 18 667 14846
Vallo di Nera PG 19 364 15210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
100 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 1.7 2020-02-27
00:43:31		 42.8085 13.0845 9 2020-07-18
21:08:22		 Bollettino Sismico Italiano INGV 76899421
Reviewed
Rev100 		ML 1.7 2020-02-27
00:43:31		 42.8087 13.0847 9 2020-02-27
08:40:53		 Sala Sismica INGV-Roma 76862501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-27 00:43:31 ± 0.06
Latitude 42.8085 ± 0.0027
Longitude 13.0845 ± 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 76899421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 446
Semi-minor axis of confidence ellipse (meter) 96
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 298
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.03327
Epicentral distance of station farthest from the epicenter (degree) 0.45865
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 76899421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-26 14:53:56

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 76862501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-27 08:40:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-02-27T00:43:44.61 0.3 undecidable manual S 57 36.4413 50 0.35 67
IV.RM33.EHZ. 2020-02-27T00:43:44.09 0.6 undecidable manual S 162 34.8429 50 0.24 46
IV.GUMA.HHZ. 2020-02-27T00:43:43.98 0.6 undecidable manual S 36 34.743 50 0.15 47
IV.CESI.HHZ. 2020-02-27T00:43:41.05 0.3 undecidable manual S 326 26.2515 109 -0.23 70
IV.SNTG.HHE. 2020-02-27T00:43:41.59 0.3 undecidable manual P 347 50.9157 50 0.43 65
IV.CESX.HHZ. 2020-02-27T00:43:40.33 0.3 undecidable manual P 241 46.2204 50 -0.12 70
IV.TERO.HHZ. 2020-02-27T00:43:40.02 0.3 undecidable manual P 116 47.1195 50 -0.56 63
IV.LNSS.HHZ. 2020-02-27T00:43:40.21 0.3 undecidable manual S 189 23.0547 112 -0.05 73
IV.FDMO.HHZ. 2020-02-27T00:43:40.65 0.3 undecidable manual S 1 25.2525 110 -0.33 69
IV.GAVE.EHZ. 2020-02-27T00:43:39.56 0.3 undecidable manual S 230 20.1687 114 0.23 71
IV.MMO1.EHZ. 2020-02-27T00:43:39.62 0.1 undecidable manual S 63 22.1556 112 -0.33 93
IV.MF5.EHZ. 2020-02-27T00:43:39.01 0.1 undecidable manual P 57 36.4413 50 0.08 95
IV.RM33.EHZ. 2020-02-27T00:43:39.10 0.3 undecidable manual P 162 34.8429 50 0.41 67
IT.FOPC.HGN. 2020-02-27T00:43:38.77 0.1 undecidable manual P 300 35.742 50 -0.06 96
IV.MML1.HNE. 2020-02-27T00:43:38.54 0.3 undecidable manual P 345 35.0427 50 -0.18 70
IV.GUMA.HHZ. 2020-02-27T00:43:38.68 0.1 undecidable manual P 36 34.743 50 0 97
IV.ARRO.EHZ. 2020-02-27T00:43:38.68 0.1 undecidable manual P 226 36.3414 50 -0.25 92
IV.MC2.EHZ. 2020-02-27T00:43:37.86 0.3 undecidable manual S 37 14.2746 123 0.35 70
IV.CESI.HHZ. 2020-02-27T00:43:37.16 0.1 undecidable manual P 326 26.2515 109 -0.05 97
IV.SMA1.EHN. 2020-02-27T00:43:37.06 0.3 undecidable manual P 134 28.4493 108 -0.57 64
IV.FDMO.HHZ. 2020-02-27T00:43:36.92 0.1 undecidable manual P 1 25.2525 110 -0.12 96
IV.GAVE.EHZ. 2020-02-27T00:43:36.25 0.1 positive manual P 230 20.1687 114 0.17 96
IV.MMO1.EHZ. 2020-02-27T00:43:36.34 0.1 positive manual P 63 22.1556 112 -0.1 97
IV.LNSS.HHZ. 2020-02-27T00:43:36.56 0.1 undecidable manual P 189 23.0547 112 -0.06 98
IV.MC2.EHZ. 2020-02-27T00:43:35.33 0.1 negative manual P 37 14.2746 123 0.3 95
IV.NRCA.HNZ. 2020-02-27T00:43:35.17 0.1 undecidable manual S 41 3.6963 158 0.11 100
IV.NRCA.HNZ. 2020-02-27T00:43:33.90 0.1 negative manual P 41 3.6963 158 0.28 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.8 0.0004805 1.22 AML other m 2020-02-27T00:43:40.06
IV.LNSS.HHN. ML:1.7 0.0003565 0.14 AML other m 2020-02-27T00:43:40.57
IV.LNSS.HHE. ML:1.7 0.0003205 0.26 AML other m 2020-02-27T00:43:40.52
IV.CESI.HHN. ML:1.8 0.00031800000000000003 0.44 AML other m 2020-02-27T00:43:41.58
IV.CESI.HHE. ML:1.6 0.0002157 0.46 AML other m 2020-02-27T00:43:41.42
IV.FDMO.HHE. ML:1.6 0.00021150000000000002 0.96 AML other m 2020-02-27T00:43:41.44
IV.FDMO.HHN. ML:1.5 0.0001935 0.9 AML other m 2020-02-27T00:43:41.89
IV.GAVE.EHE. ML:1.8 0.00041950000000000006 1.02 AML other m 2020-02-27T00:43:41.47
IV.GUMA.HHN. ML:2.0 0.000441 0.96 AML other m 2020-02-27T00:43:45.37
IV.GUMA.HHE. ML:1.9 0.00034599999999999995 0.94 AML other m 2020-02-27T00:43:47.25
IV.TERO.HHN. ML:1.2 0.00004679999999999999 0.46 AML other m 2020-02-27T00:43:47.99
IV.TERO.HHE. ML:1.2 0.00004635 0.7 AML other m 2020-02-27T00:43:49.53
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