Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 04-01-2020 and time 08:56:06 (UTC) in region 7 km SE Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 7 km SE Norcia (PG), on

  • 04-01-2020 08:56:06 (UTC)
  • 04-01-2020 09:56:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7450, 13.1550 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 7 4957 4957
Accumoli RI 9 667 5624
Cascia PG 12 3217 8841
Arquata del Tronto AP 12 1178 10019
Cittareale RI 14 482 10501
Castelsantangelo sul Nera MC 17 281 10782
Amatrice RI 17 2657 13439
Preci PG 18 724 14163
Poggiodomo PG 18 117 14280
Montegallo AP 18 523 14803
Monteleone di Spoleto PG 20 599 15402

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km SE of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
46 Km E of Terni (111501 inhabitants)
48 Km NW of L'Aquila (69753 inhabitants)
74 Km SE of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
92 Km W of Pescara (121014 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
94 Km W of Chieti (51815 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 2020-01-04
08:56:06		 42.7448 13.1547 10 2020-07-18
21:08:19		 Bollettino Sismico Italiano INGV 76286591
Reviewed
Rev100 		ML 1.8 2020-01-04
08:56:06		 42.7482 13.1623 11 2020-01-04
09:09:11		 Sala Sismica INGV-Roma 75242371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-04 08:56:06 ± 0.07
Latitude 42.7448 ± 0.0036
Longitude 13.1547 ± 0.0061
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 76286591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 509
Semi-minor axis of confidence ellipse (meter) 207
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.91011
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 75242371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-04 09:09:11

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 35
Type of magnitude ML
Reference to an origin 76286591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-06 10:48:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.OSSC.HNZ. 2020-01-04T08:57:00.24 3.0 undecidable manual Sg 4.36 0
IT.VNF1.HGZ. 2020-01-04T08:56:52.28 3.0 undecidable manual S 0.44 0
IV.PIEI.HHZ. 2020-01-04T08:56:37.28 0.3 undecidable manual S 330 101.0211 50 1.51 36
IV.CSNT.HHZ. 2020-01-04T08:56:36.45 3.0 undecidable manual Pg 3.09 0
IV.VCEL.EHZ. 2020-01-04T08:56:28.48 0.3 undecidable manual S 125 68.1762 50 1.49 39
IV.EL6.EHZ. 2020-01-04T08:56:27.07 0.3 undecidable manual S 356 64.9905 50 0.93 52
IV.ATCC.EHZ. 2020-01-04T08:56:26.66 0.3 undecidable manual S 320 64.2912 50 0.71 57
IV.MNTT.EHZ. 2020-01-04T08:56:24.10 0.3 undecidable manual S 45 50.2164 50 1.9 30
IV.PIEI.HHZ. 2020-01-04T08:56:23.64 0.6 undecidable manual P 330 101.0211 50 0.41 40
IV.GIGS.HHZ. 2020-01-04T08:56:20.84 0.3 undecidable manual S 133 47.0196 50 -0.51 64
IV.MF5.EHZ. 2020-01-04T08:56:19.15 0.1 undecidable manual S 43 36.6411 50 0.58 85
IV.GUMA.HHZ. 2020-01-04T08:56:19.25 0.3 undecidable manual S 23 38.2284 50 0.26 69
IV.CSP1.EHZ. 2020-01-04T08:56:18.84 0.1 undecidable manual S 6 38.7279 50 -0.29 91
IV.VCEL.EHZ. 2020-01-04T08:56:18.13 0.1 undecidable manual P 125 68.1762 50 -0.04 91
IV.FDMO.HHZ. 2020-01-04T08:56:17.21 0.1 undecidable manual S 350 32.8449 50 -0.34 91
IV.CESI.HHZ. 2020-01-04T08:56:17.91 0.1 undecidable manual S 325 35.3424 50 -0.3 92
IV.ATCC.EHZ. 2020-01-04T08:56:17.46 0.1 undecidable manual P 320 64.2912 50 -0.1 91
IV.EL6.EHZ. 2020-01-04T08:56:17.47 0.1 undecidable manual P 356 64.9905 50 -0.2 89
IV.MNTT.EHZ. 2020-01-04T08:56:16.02 0.1 undecidable manual P 45 50.2164 50 0.62 81
IV.CAMP.HHZ. 2020-01-04T08:56:16.66 0.1 undecidable manual S 138 31.1466 50 -0.44 90
IV.SNTG.HHZ. 2020-01-04T08:56:16.80 3.0 undecidable manual P -0.19 0
IV.FEMA.HNZ. 2020-01-04T08:56:15.12 0.3 undecidable manual S 341 25.5522 50 -0.5 67
IV.RM33.EHZ. 2020-01-04T08:56:15.79 0.1 undecidable manual S 169 26.6511 50 -0.11 97
IV.MMO1.EHZ. 2020-01-04T08:56:14.15 0.1 undecidable manual S 39 22.1556 114 -0.39 92
IV.GIGS.HHZ. 2020-01-04T08:56:14.36 0.1 undecidable manual P 133 47.0196 50 -0.55 84
IV.GAVE.EHZ. 2020-01-04T08:56:14.54 0.1 undecidable manual S 255 22.0668 115 0.04 99
IV.GUMA.HHZ. 2020-01-04T08:56:13.55 0.1 undecidable manual P 23 38.2284 50 0.01 97
IV.MTRA.EHZ. 2020-01-04T08:56:13.54 0.1 undecidable manual S 86 19.7691 117 -0.25 95
IV.ARRO.EHZ. 2020-01-04T08:56:13.28 0.1 undecidable manual P 240 36.6411 50 -0.03 97
IV.MC2.EHZ. 2020-01-04T08:56:13.48 0.1 undecidable manual S 9 18.6702 118 0.01 100
IV.SMA1.EHZ. 2020-01-04T08:56:13.84 0.1 undecidable manual S 131 19.4694 117 0.15 97
IV.MF5.EHZ. 2020-01-04T08:56:13.36 0.1 undecidable manual P 43 36.6411 50 0.06 96
IV.T1299.HNZ. 2020-01-04T08:56:13.09 0.1 undecidable manual S 140 16.0728 122 0.41 93
IV.LNSS.HHZ. 2020-01-04T08:56:13.70 0.3 undecidable manual S 211 18.2706 119 0.35 70
IV.CSP1.EHZ. 2020-01-04T08:56:13.31 0.1 negative manual P 6 38.7279 50 -0.31 91
IV.CAMP.HHZ. 2020-01-04T08:56:12.13 0.1 positive manual P 138 31.1466 50 -0.32 92
IV.FDMO.HHZ. 2020-01-04T08:56:12.31 0.1 negative manual P 350 32.8449 50 -0.4 90
IV.CESI.HHZ. 2020-01-04T08:56:12.87 0.1 undecidable manual P 325 35.3424 50 -0.23 93
IV.FEMA.HNZ. 2020-01-04T08:56:11.32 0.1 undecidable manual P 341 25.5522 50 -0.28 94
IV.RM33.EHZ. 2020-01-04T08:56:11.59 0.1 undecidable manual P 169 26.6511 50 -0.17 96
IV.MTCL.HGZ. 2020-01-04T08:56:11.99 3.0 undecidable manual P 0
IV.NRCA.HNZ. 2020-01-04T08:56:11.02 0.1 undecidable manual S 342 10.3785 134 -0.09 100
IV.SMA1.EHZ. 2020-01-04T08:56:10.46 0.1 positive manual P 131 19.4694 117 -0.03 100
IV.T1299.HNZ. 2020-01-04T08:56:10.17 0.1 positive manual P 140 16.0728 122 0.27 95
IV.LNSS.HHZ. 2020-01-04T08:56:10.52 0.1 positive manual P 211 18.2706 119 0.23 96
IV.MTRA.EHZ. 2020-01-04T08:56:10.36 0.1 positive manual P 86 19.7691 117 -0.18 96
IV.MMO1.EHZ. 2020-01-04T08:56:10.76 0.1 positive manual P 39 22.1556 114 -0.21 95
IV.MC2.EHZ. 2020-01-04T08:56:10.37 0.1 negative manual P 9 18.6702 118 0.01 100
IV.GAVE.EHZ. 2020-01-04T08:56:10.97 0.1 positive manual P 255 22.0668 115 0.02 99
IV.NRCA.HNZ. 2020-01-04T08:56:09.14 0.1 negative manual P 342 10.3785 134 0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.3 0.00263 0.08 AML other m 2020-01-04T08:56:11.11
IV.NRCA.HHN. ML:2.4 0.00354 0.1 AML other m 2020-01-04T08:56:11.10
IV.NRCA.HNN. ML:2.4 0.00314 0.1 AML other m 2020-01-04T08:56:11.11
IV.LNSS.HHN. ML:1.8 0.00046550000000000004 0.16 AML other m 2020-01-04T08:56:13.88
IV.MTRA.HNN. ML:1.7 0.000382 1.28 AML other m 2020-01-04T08:56:13.26
IV.LNSS.HNN. ML:1.7 0.000421 1.38 AML other m 2020-01-04T08:56:14.05
IV.MTRA.HNE. ML:1.9 0.000557 0.18 AML other m 2020-01-04T08:56:14.12
IV.MTRA.EHE. ML:1.9 0.0005515 0.18 AML other m 2020-01-04T08:56:14.13
IV.SMA1.EHE. ML:1.5 0.00024180734999999998 0.8608 AML other m 2020-01-04T08:56:14.51
IV.SMA1.EHN. ML:1.4 0.00020736685 0.5184 AML other m 2020-01-04T08:56:14.79
IV.MTRA.EHN. ML:1.7 0.00035999999999999997 0.22 AML other m 2020-01-04T08:56:14.83
IV.LNSS.HNE. ML:1.7 0.0004125 0.86 AML other m 2020-01-04T08:56:15.05
IV.LNSS.HHE. ML:1.7 0.0003775 0.86 AML other m 2020-01-04T08:56:15.48
IV.GAVE.EHE. ML:1.8 0.00047299999999999995 1.22 AML other m 2020-01-04T08:56:15.82
IV.GAVE.EHN. ML:1.8 0.00041000000000000005 0.58 AML other m 2020-01-04T08:56:16.11
IV.RM33.EHN. ML:1.4 0.00014450000000000002 0.7 AML other m 2020-01-04T08:56:16.92
IV.RM33.EHE. ML:1.5 0.0001615 1.88 AML other m 2020-01-04T08:56:17.98
IV.CAMP.HHN. ML:1.2 0.0000726 1.34 AML other m 2020-01-04T08:56:17.14
IV.CAMP.HHE. ML:1.4 0.00010499999999999999 1.12 AML other m 2020-01-04T08:56:17.31
IV.FDMO.HHN. ML:1.4 0.00011269999999999999 1 AML other m 2020-01-04T08:56:17.35
IV.CESI.HHE. ML:1.8 0.0002405 0.14 AML other m 2020-01-04T08:56:18.03
IV.CESI.HNE. ML:1.8 0.00024269025 0.1344 AML other m 2020-01-04T08:56:18.04
IV.CESI.HHN. ML:2.0 0.0003795 0.28 AML other m 2020-01-04T08:56:18.18
IV.CESI.HNN. ML:2.0 0.0003605429 0.2752 AML other m 2020-01-04T08:56:18.18
IV.GUMA.HNN. ML:2.6 0.0013239999999999999 0.4 AML other m 2020-01-04T08:56:18.63
IV.FDMO.HHE. ML:1.5 0.00014850000000000003 0.22 AML other m 2020-01-04T08:56:18.76
IV.GUMA.HHE. ML:2.3 0.000804 0.28 AML other m 2020-01-04T08:56:19.79
IV.CSP1.EHE. ML:1.7 0.000169 0.4 AML other m 2020-01-04T08:56:19.66
IV.GUMA.HHN. ML:2.1 0.00048249999999999996 1.38 AML other m 2020-01-04T08:56:19.75
IV.MF5.EHN. ML:1.7 0.000192 0.2 AML other m 2020-01-04T08:56:19.80
IV.MF5.EHE. ML:1.6 0.00016450000000000001 0.2 AML other m 2020-01-04T08:56:20.14
IV.CSP1.EHN. ML:1.6 0.0001605 0.88 AML other m 2020-01-04T08:56:21.01
IV.GIGS.HHN. ML:1.2 0.0000449645 0.16 AML other m 2020-01-04T08:56:21.37
IV.GIGS.HHE. ML:1.0 0.00002483934 0.0832 AML other m 2020-01-04T08:56:21.48
IV.GUMA.HNE. ML:2.1 0.0004435 0.52 AML other m 2020-01-04T08:56:21.80
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