Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 21-12-2019 and time 15:39:17 (UTC) in region 4 km E Norcia (PG)

A magnitude ML 2.0 earthquake occured in region: 4 km E Norcia (PG), on

  • 21-12-2019 15:39:17 (UTC)
  • 21-12-2019 16:39:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8070, 13.1330 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 4 4957 4957
Castelsantangelo sul Nera MC 10 281 5238
Preci PG 11 724 5962
Cascia PG 14 3217 9179
Arquata del Tronto AP 14 1178 10357
Visso MC 14 1107 11464
Ussita MC 15 444 11908
Accumoli RI 16 667 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Montemonaco AP 19 604 14777
Sellano PG 19 1079 15856
Poggiodomo PG 19 117 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)
50 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
69 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
99 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 2.0 2019-12-21
15:39:17		 42.8072 13.1327 10 2020-02-28
16:42:25		 Bollettino Sismico Italiano INGV 76572611
Reviewed
Rev100 		ML 2.0 2019-12-21
15:39:17		 42.8082 13.1142 10 2019-12-21
15:47:53		 Sala Sismica INGV-Roma 74858201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-21 15:39:17 ± 0.04
Latitude 42.8072 ± 0.0018
Longitude 13.1327 ± 0.0037
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 76572611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 330
Semi-minor axis of confidence ellipse (meter) 74
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 89
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) 83
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 41
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.15563
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 76572611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-16 18:29:39

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 74858201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-21 15:47:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2019-12-21T15:41:06.97 3.0 undecidable manual Sn 8.33 0
IX.STN3.HHZ.02 2019-12-21T15:40:44.71 3.0 undecidable manual Sg 6.28 0
IV.SLCN.HHZ. 2019-12-21T15:40:40.08 3.0 undecidable manual Sn -0.77 0
IV.VARE.HHZ. 2019-12-21T15:40:27.32 3.0 undecidable manual Pn 4.69 0
IV.MTMR.HNZ. 2019-12-21T15:40:22.09 3.0 undecidable manual Sn -1.37 0
IV.SALB.HHZ. 2019-12-21T15:40:21.53 3.0 undecidable manual Pg 7.41 0
IV.CAR1.HNZ. 2019-12-21T15:40:19.88 3.0 positive manual Pn -0.26 0
IV.PAOL.HHZ. 2019-12-21T15:40:15.64 3.0 undecidable manual Sn -0.9 0
IV.CPGN.HNZ. 2019-12-21T15:39:41.88 3.0 undecidable manual P 128.2716 2.7 0
IV.CESX.HHE. 2019-12-21T15:39:34.36 0.6 undecidable manual S 244 49.617 50 0.56 42
IV.MOMA.HNZ. 2019-12-21T15:39:33.40 0.6 undecidable manual S 270 45.8208 50 0.63 41
IV.ARVD.HHZ. 2019-12-21T15:39:31.49 0.6 undecidable manual P 349 78.1662 50 0.03 45
IV.SEF1.HNN. 2019-12-21T15:39:31.60 0.6 undecidable manual S 338 40.5261 50 0.22 46
IV.ARRO.EHE. 2019-12-21T15:39:31.00 0.3 undecidable manual S 230 39.1275 50 0 73
IV.MML1.HNE. 2019-12-21T15:39:30.30 0.3 undecidable manual S 339 36.4413 50 0.03 73
IV.GUMA.HNN. 2019-12-21T15:39:29.60 0.6 undecidable manual S 30 32.745 50 0.3 46
IV.RM33.EHZ. 2019-12-21T15:39:29.30 0.3 undecidable manual S 169 33.744 50 -0.25 70
IV.CSP1.EHE. 2019-12-21T15:39:29.00 0.3 undecidable manual S 10 32.1456 50 -0.12 72
IV.MF5.EHZ. 2019-12-21T15:39:29.90 0.3 undecidable manual S 53 33.3444 50 0.46 67
IV.EL6.EHZ. 2019-12-21T15:39:28.32 0.3 undecidable manual P 358 57.9975 50 -0.03 70
IV.FDMO.HHZ. 2019-12-21T15:39:27.10 0.3 undecidable manual S 352 25.752 50 -0.31 70
IV.CESI.HHZ. 2019-12-21T15:39:27.70 0.3 undecidable manual S 320 28.749 50 -0.51 67
IV.CESX.HHE. 2019-12-21T15:39:27.26 0.6 undecidable manual P 244 49.617 50 0.2 46
IV.ASSB.HHZ. 2019-12-21T15:39:26.52 0.3 undecidable manual P 304 46.5201 50 -0.06 71
IV.MOMA.HNZ. 2019-12-21T15:39:26.68 0.6 undecidable manual P 270 45.8208 50 0.22 46
IV.LNSS.HHZ. 2019-12-21T15:39:26.90 0.3 undecidable manual S 198 23.8539 113 0.06 74
IV.SMA1.EHN. 2019-12-21T15:39:26.80 0.6 undecidable manual S 140 25.6521 50 -0.59 43
IT.MTCL.HGE. 2019-12-21T15:39:26.43 0.3 undecidable manual S -0.11 72
IV.T1299.HNN. 2019-12-21T15:39:26.50 0.3 undecidable manual S 148 22.755 114 0.03 75
IV.MMO1.EHN. 2019-12-21T15:39:25.00 0.3 undecidable manual S 57 18.87 118 -0.25 72
IV.ARRO.EHE. 2019-12-21T15:39:25.38 0.1 undecidable manual P 230 39.1275 50 -0.07 96
IV.FEMA.HNE. 2019-12-21T15:39:25.00 0.3 undecidable manual S 339 18.4704 118 -0.14 74
IV.SEF1.HNN. 2019-12-21T15:39:25.66 0.3 undecidable manual P 338 40.5261 50 0 73
IV.MML1.HNE. 2019-12-21T15:39:24.97 0.3 undecidable manual P 339 36.4413 50 -0.05 73
IV.RM33.EHZ. 2019-12-21T15:39:24.30 0.3 undecidable manual P 169 33.744 50 -0.31 69
IV.CSP1.EHE. 2019-12-21T15:39:24.07 0.6 undecidable manual P 10 32.1456 50 -0.29 46
IV.MF5.EHZ. 2019-12-21T15:39:24.83 0.3 undecidable manual P 53 33.3444 50 0.29 69
IV.GUMA.HNN. 2019-12-21T15:39:24.67 0.6 undecidable manual P 30 32.745 50 0.21 47
IV.MC2.EHZ. 2019-12-21T15:39:23.70 0.6 undecidable manual S 22 12.4764 129 0.31 48
IV.SMA1.EHN. 2019-12-21T15:39:23.51 0.6 undecidable manual P 140 25.6521 50 0.15 48
IV.CESI.HHZ. 2019-12-21T15:39:23.83 0.3 negative manual P 320 28.749 50 -0.01 74
IV.FDMO.HHZ. 2019-12-21T15:39:23.24 0.1 undecidable manual P 352 25.752 50 -0.13 97
IT.MTCL.HGE. 2019-12-21T15:39:22.83 0.1 undecidable manual P -0.06 97
IV.LNSS.HHZ. 2019-12-21T15:39:22.97 0.1 undecidable manual P 198 23.8539 113 -0.07 99
IV.MTRA.EHZ. 2019-12-21T15:39:22.61 3.0 undecidable manual P 22.1556 -0.12 0
IV.T1299.HNN. 2019-12-21T15:39:22.86 0.3 undecidable manual P 148 22.755 114 0.03 75
IV.MMO1.EHN. 2019-12-21T15:39:22.08 0.3 undecidable manual P 57 18.87 118 -0.04 75
IV.FEMA.HNE. 2019-12-21T15:39:22.23 0.1 undecidable manual P 339 18.4704 118 0.17 97
IV.MC2.EHZ. 2019-12-21T15:39:21.34 0.1 positive manual P 22 12.4764 129 0.29 96
IV.NRCA.HNZ. 2019-12-21T15:39:21.30 0.3 undecidable manual S 333 3.2967 162 -0.2 74
IV.NRCA.HNZ. 2019-12-21T15:39:20.13 0.1 negative manual P 333 3.2967 162 0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.3 0.0038050000000000002 0.16 AML other m 2019-12-21T15:39:21.37
IV.NRCA.HHE. ML:2.4 0.004234999999999999 0.14 AML other m 2019-12-21T15:39:21.45
IV.NRCA.HHN. ML:2.4 0.004215 0.46 AML other m 2019-12-21T15:39:21.46
IV.NRCA.HNN. ML:2.4 0.00421 0.14 AML other m 2019-12-21T15:39:21.46
IV.LNSS.HNN. ML:2.2 0.000911 0.36 AML other m 2019-12-21T15:39:27.27
IV.LNSS.HHN. ML:2.2 0.0009915 0.36 AML other m 2019-12-21T15:39:27.27
IV.LNSS.HNE. ML:2.1 0.0008895 0.36 AML other m 2019-12-21T15:39:27.41
IV.LNSS.HHE. ML:2.2 0.0009235 0.4 AML other m 2019-12-21T15:39:27.42
IV.FDMO.HHN. ML:1.7 0.0002685 0.84 AML other m 2019-12-21T15:39:27.46
IV.FDMO.HHE. ML:1.5 0.0001975 0.56 AML other m 2019-12-21T15:39:27.56
IV.CESI.HHN. ML:2.3 0.001072 0.52 AML other m 2019-12-21T15:39:28.62
IV.CESI.HNN. ML:2.2 0.00075796255 0.0768 AML other m 2019-12-21T15:39:28.62
IV.CESI.HHE. ML:2.1 0.0006765 0.44 AML other m 2019-12-21T15:39:28.69
IV.CESI.HNE. ML:1.9 0.00039213355 0.0896 AML other m 2019-12-21T15:39:28.69
IV.RM33.HNE. ML:1.6 0.00016398788 1.6032 AML other m 2019-12-21T15:39:29.86
IV.MF5.EHN. ML:1.8 0.00026177345 0.3072 AML other m 2019-12-21T15:39:30.37
IV.RM33.EHE. ML:1.6 0.00016296235000000001 0.3328 AML other m 2019-12-21T15:39:30.42
IV.RM33.HNN. ML:1.6 0.00018170429999999997 0.2688 AML other m 2019-12-21T15:39:30.49
IV.RM33.EHN. ML:1.6 0.00015091265 0.256 AML other m 2019-12-21T15:39:30.62
IV.ASSB.HHN. ML:1.4 0.000076844393 0.768 AML other m 2019-12-21T15:39:33.68
IV.EL6.EHN. ML:1.9 0.00017913570000000002 0.1792 AML other m 2019-12-21T15:39:37.50
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
Waveforms Seismic signals in miniseed + resp format Download