Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 09-03-2021 and time 06:18:09 (UTC) in region 3 km E Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 3 km E Norcia (PG), on

  • 09-03-2021 06:18:09 (UTC)
  • 09-03-2021 07:18:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7980, 13.1320 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 3 4957 4957
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 12 724 5962
Cascia PG 13 3217 9179
Arquata del Tronto AP 14 1178 10357
Accumoli RI 15 667 11024
Visso MC 15 1107 12131
Ussita MC 16 444 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Poggiodomo PG 19 117 14290
Sellano PG 20 1079 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
70 Km SE of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km NW 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 1.6 2021-03-09
06:18:09		 42.7983 13.1323 9 2021-07-12
16:55:02		 Bollettino Sismico Italiano INGV 88179971
Reviewed
Rev100 		ML 1.6 2021-03-09
06:18:09		 42.7932 13.1368 9 2021-03-09
06:25:37		 Sala Sismica INGV-Roma 87936621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-09 06:18:09 ± 0.04
Latitude 42.7983 ± 0.0018
Longitude 13.1323 ± 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 88179971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 283
Semi-minor axis of confidence ellipse (meter) 159
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 54
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 42
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.85615
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 34
Type of magnitude ML
Reference to an origin 88179971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-16 06:38:54

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 34
Type of magnitude ML
Reference to an origin 87936621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-09 06:25:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIR.HHZ. 2021-03-09T06:18:42.75 3.0 undecidable manual Pg 4.31 0
IV.PIEI.HHZ. 2021-03-09T06:18:26.13 0.1 undecidable manual P 330 95.0382 50 0.1 86
IV.MOMA.HHZ. 2021-03-09T06:18:25.74 0.6 undecidable manual S 271 45.8208 50 0.89 37
IV.T0110.HHZ. 2021-03-09T06:18:24.24 0.1 undecidable manual P 140 82.1511 50 0.18 86
IV.TERO.HHZ. 2021-03-09T06:18:23.98 0.6 undecidable manual S 117 43.1235 50 -0.15 47
IV.ATFO.HHZ. 2021-03-09T06:18:23.39 0.3 undecidable manual P 324 77.6667 50 0.02 67
IV.MF5.EHZ. 2021-03-09T06:18:22.17 0.1 undecidable manual S 52 33.9438 50 0.49 88
IV.GUMA.HHZ. 2021-03-09T06:18:22.07 0.1 undecidable manual S 29 33.6441 50 0.47 89
IV.MURB.HHZ. 2021-03-09T06:18:22.47 0.1 undecidable manual P 316 71.2731 50 0.09 90
IV.CAMP.HHZ. 2021-03-09T06:18:22.17 0.1 undecidable manual S 142 36.8298 50 -0.29 92
IV.CSP1.EHZ. 2021-03-09T06:18:21.05 0.3 undecidable manual S 10 33.0447 50 -0.41 67
IV.RM33.EHZ. 2021-03-09T06:18:21.27 0.1 undecidable manual S 168 32.745 50 -0.11 96
IV.FOSV.EHZ. 2021-03-09T06:18:20.81 0.3 undecidable manual P 331 62.7927 50 -0.25 66
IV.ATCC.EHZ. 2021-03-09T06:18:20.43 0.3 undecidable manual P 317 58.5969 50 0 70
IV.CESI.HHZ. 2021-03-09T06:18:20.10 0.1 undecidable manual S 321 29.4483 107 -0.29 93
IV.EL6.EHZ. 2021-03-09T06:18:20.20 0.3 undecidable manual P 358 58.9965 50 -0.28 66
IV.CESX.HHZ. 2021-03-09T06:18:19.10 0.1 undecidable manual P 245 49.2174 50 0.12 93
IV.SMA1.EHZ. 2021-03-09T06:18:19.00 0.1 undecidable manual S 138 24.8529 110 0.11 97
IV.MOMA.HHZ. 2021-03-09T06:18:18.54 0.1 undecidable manual P 271 45.8208 50 0.09 94
IV.GAVE.EHZ. 2021-03-09T06:18:18.27 0.3 undecidable manual S 239 22.6551 112 0.09 73
IV.MMO1.EHZ. 2021-03-09T06:18:17.02 0.1 undecidable manual S 55 19.3695 115 -0.1 98
IV.MTRA.EHZ. 2021-03-09T06:18:17.92 0.6 undecidable manual S 102 21.9669 112 -0.03 50
IV.FEMA.HNE. 2021-03-09T06:18:17.16 0.1 undecidable manual S 340 19.3695 115 0.05 99
IV.SAP2.EHE. 2021-03-09T06:18:17.59 0.3 undecidable manual P 33 39.5271 50 0.1 71
IV.TERO.HHZ. 2021-03-09T06:18:17.71 0.1 undecidable manual P 117 43.1235 50 -0.32 90
IV.GUMA.HHZ. 2021-03-09T06:18:16.63 0.1 undecidable manual P 29 33.6441 50 0.05 97
IV.ARRO.EHZ. 2021-03-09T06:18:16.86 3.0 undecidable manual P 0
IV.MML1.HNE. 2021-03-09T06:18:16.85 0.1 undecidable manual P 340 37.3293 50 -0.29 91
IV.CAMP.HHZ. 2021-03-09T06:18:16.80 0.1 positive manual P 142 36.8298 50 -0.27 92
IV.CSP1.EHZ. 2021-03-09T06:18:16.19 0.1 undecidable manual P 10 33.0447 50 -0.3 92
IV.MF5.EHZ. 2021-03-09T06:18:16.77 0.1 undecidable manual P 52 33.9438 50 0.15 95
IV.RM33.EHZ. 2021-03-09T06:18:16.50 0.1 undecidable manual P 168 32.745 50 0.05 97
IV.SMA1.EHZ. 2021-03-09T06:18:15.06 0.1 positive manual P 138 24.8529 110 0.05 98
IV.CESI.HHZ. 2021-03-09T06:18:15.75 0.1 positive manual P 321 29.4483 107 -0.12 96
IV.FDMO.HHN. 2021-03-09T06:18:15.08 0.1 undecidable manual P 352 26.6511 109 -0.26 94
IV.MC2.EHZ. 2021-03-09T06:18:15.41 0.1 undecidable manual S 20 13.3755 124 0.12 99
IV.GAVE.EHZ. 2021-03-09T06:18:14.73 0.1 undecidable manual P 239 22.6551 112 0.14 97
IV.MMO1.EHZ. 2021-03-09T06:18:14.00 0.1 positive manual P 55 19.3695 115 0.02 100
IV.MTRA.EHZ. 2021-03-09T06:18:14.48 0.1 positive manual P 102 21.9669 112 0.01 100
IT.MTCL.HGZ. 2021-03-09T06:18:14.78 0.1 undecidable manual P 334 24.2535 110 -0.1 97
IV.FEMA.HNE. 2021-03-09T06:18:14.08 0.1 undecidable manual P 340 19.3695 115 0.1 98
IV.MC2.EHZ. 2021-03-09T06:18:13.17 0.1 undecidable manual P 20 13.3755 124 0.24 96
IV.NRCA.HNZ. 2021-03-09T06:18:13.00 0.1 undecidable manual S 339 4.1958 155 -0.14 100
IV.NRCA.HNZ. 2021-03-09T06:18:11.94 0.1 negative manual P 339 4.1958 155 0.25 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.7 0.0003445 1.16 AML other m 2021-03-09T06:18:18.68
IV.MTRA.HNN. ML:1.8 0.0004485 0.32 AML other m 2021-03-09T06:18:18.67
IV.MTRA.EHN. ML:1.8 0.0004075 0.32 AML other m 2021-03-09T06:18:18.68
IV.MTRA.HNE. ML:1.7 0.000356 0.36 AML other m 2021-03-09T06:18:18.67
IV.GAVE.EHE. ML:1.7 0.00035650000000000005 0.56 AML other m 2021-03-09T06:18:19.70
IV.SMA1.EHE. ML:1.6 0.0002645 0.5 AML other m 2021-03-09T06:18:19.60
IV.GAVE.EHN. ML:1.7 0.0003085 1.8 AML other m 2021-03-09T06:18:19.96
IV.CESI.HHE. ML:1.6 0.000194 0.4 AML other m 2021-03-09T06:18:20.42
IV.CESI.HHN. ML:1.6 0.0002255 0.9 AML other m 2021-03-09T06:18:20.36
IV.CSP1.EHE. ML:1.9 0.00035499999999999996 0.26 AML other m 2021-03-09T06:18:21.75
IV.RM33.EHN. ML:1.3 0.00009685000000000001 0.74 AML other m 2021-03-09T06:18:21.80
IV.CSP1.EHN. ML:1.9 0.00031699999999999995 0.8 AML other m 2021-03-09T06:18:22.02
IV.GUMA.HNN. ML:1.9 0.0003375 0.32 AML other m 2021-03-09T06:18:22.40
IV.GUMA.HNE. ML:1.8 0.00028349999999999995 0.2 AML other m 2021-03-09T06:18:22.36
IV.GUMA.HHE. ML:2.0 0.0004375 0.24 AML other m 2021-03-09T06:18:22.38
IV.RM33.EHE. ML:1.4 0.0001145 0.3 AML other m 2021-03-09T06:18:22.31
IV.CAMP.HHE. ML:1.5 0.0001095 0.22 AML other m 2021-03-09T06:18:22.37
IV.GUMA.HHN. ML:1.8 0.0002895 1.66 AML other m 2021-03-09T06:18:23.01
IV.CAMP.HHN. ML:1.1 0.0000514 0.62 AML other m 2021-03-09T06:18:23.38
IV.SMA1.EHN. ML:1.6 0.0002535 0.36 AML other m 2021-03-09T06:18:23.85
IV.TERO.HHN. ML:1.4 0.00008094999999999999 1.1 AML other m 2021-03-09T06:18:24.89
IV.TERO.HHE. ML:1.2 0.00005665 0.1 AML other m 2021-03-09T06:18:25.71
IV.MOMA.HHN. ML:1.5 0.0000918 1.76 AML other m 2021-03-09T06:18:27.92
IV.MOMA.HHE. ML:1.5 0.00008374999999999999 0.18 AML other m 2021-03-09T06:18:27.69
IV.CESX.HHE. ML:1.2 0.0000449 0.42 AML other m 2021-03-09T06:18:29.38
IV.EL6.EHN. ML:1.6 0.0000944 0.2 AML other m 2021-03-09T06:18:29.66
IV.CESX.HHN. ML:1.2 0.00004675 0.64 AML other m 2021-03-09T06:18:29.57
IV.ATCC.EHE. ML:1.6 0.00007744999999999999 0.72 AML other m 2021-03-09T06:18:30.70
IV.ATCC.EHN. ML:1.6 0.0000775 1.3 AML other m 2021-03-09T06:18:30.82
IV.EL6.EHE. ML:1.6 0.00009685000000000001 0.26 AML other m 2021-03-09T06:18:31.08
IV.MURB.HHE. ML:1.8 0.00010325 0.24 AML other m 2021-03-09T06:18:35.84
IV.MURB.HHN. ML:1.8 0.00010250000000000001 0.98 AML other m 2021-03-09T06:18:35.81
IV.PIEI.HHN. ML:1.4 0.000023199999999999998 1.24 AML other m 2021-03-09T06:18:42.00
IV.PIEI.HHE. ML:1.3 0.000020499999999999997 0.32 AML other m 2021-03-09T06:18:42.26
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