Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 02-12-2020 and time 09:57:35 (Italy) in region 3 km E Norcia (PG)

A magnitude ML 1.7 earthquake occured in region: 3 km E Norcia (PG), on

  • 02-12-2020 08:57:35 (UTC)
  • 02-12-2020 09:57:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8030, 13.1260 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 11 724 5962
Cascia PG 13 3217 9179
Arquata del Tronto AP 14 1178 10357
Visso MC 15 1107 11464
Accumoli RI 16 667 12131
Ussita MC 16 444 12575
Cerreto di Spoleto PG 17 1075 13650
Montegallo AP 18 523 14173
Poggiodomo PG 19 117 14290
Sellano PG 19 1079 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
47 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)
90 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km W of Pescara (121014 inhabitants)
97 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 1.7 2020-12-02
08:57:35		 42.8028 13.1257 9 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86171811
Reviewed
Rev100 		ML 2.0 2020-12-02
08:57:35		 42.7993 13.1213 9 2020-12-02
09:13:05		 Sala Sismica INGV-Roma 85149681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-02 08:57:35 ± 0.05
Latitude 42.8028 ± 0.0027
Longitude 13.1257 ± 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 86171811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 187
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47124
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 86171811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-11 13:10:30

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 85149681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-02 09:13:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RMP.HHZ. 2020-12-02T08:58:06.49 3.0 undecidable manual S -4.76 0
IV.CESX.HHE. 2020-12-02T08:57:52.45 0.6 undecidable manual S 244 48.9177 50 0.9 37
IV.MOMA.HNZ. 2020-12-02T08:57:51.18 0.6 undecidable manual S 270 45.2214 50 0.62 41
IV.ASSB.HHZ. 2020-12-02T08:57:50.70 0.6 undecidable manual S 305 46.3203 50 -0.15 47
IV.SAP2.EHZ. 2020-12-02T08:57:49.60 0.3 undecidable manual S 34 39.4272 50 0.59 64
IV.MMUR.HNZ. 2020-12-02T08:57:48.33 3.0 undecidable manual P -0.4 0
IV.ARRO.EHZ. 2020-12-02T08:57:48.71 0.6 undecidable manual S 230 38.4282 50 -0.04 49
IV.CAMP.HHZ. 2020-12-02T08:57:48.00 0.3 undecidable manual S 142 37.5291 50 -0.51 66
IV.MURB.HHZ. 2020-12-02T08:57:48.51 3.0 undecidable manual P 0.03 0
IV.MF5.EHZ. 2020-12-02T08:57:48.00 0.3 undecidable manual S 53 34.0437 50 0.44 68
IV.GUMA.HHZ. 2020-12-02T08:57:47.40 0.6 undecidable manual S 30 33.4443 50 -0.02 49
IV.CSP1.EHZ. 2020-12-02T08:57:46.70 0.3 undecidable manual S 11 32.6451 50 -0.51 66
IV.CESI.HHZ. 2020-12-02T08:57:45.70 0.3 undecidable manual S 321 28.749 107 -0.26 71
IV.SNTG.HHZ. 2020-12-02T08:57:45.02 1.0 undecidable manual P 343 52.3032 50 -0.28 22
IV.FDMO.HHZ. 2020-12-02T08:57:44.70 0.3 undecidable manual S 353 26.0517 109 -0.39 69
IV.CESX.HHE. 2020-12-02T08:57:44.58 0.3 undecidable manual P 244 48.9177 50 -0.2 69
IV.MOMA.HNZ. 2020-12-02T08:57:44.14 0.3 undecidable manual P 270 45.2214 50 -0.06 72
IV.SMA1.EHZ. 2020-12-02T08:57:44.80 0.3 undecidable manual S 138 25.6521 109 -0.14 73
IV.ASSB.HHZ. 2020-12-02T08:57:44.19 0.1 negative manual P 305 46.3203 50 -0.19 93
IV.MNTT.EHZ. 2020-12-02T08:57:44.95 3.0 negative manual P 0.15 0
IV.LNSS.HHZ. 2020-12-02T08:57:44.20 0.3 undecidable manual S 197 23.2545 111 0.04 75
IV.MTRA.EHZ. 2020-12-02T08:57:43.70 0.3 undecidable manual S 103 22.6551 111 -0.26 71
IV.SAP2.EHZ. 2020-12-02T08:57:43.60 0.1 negative manual P 34 39.4272 50 0.29 92
IV.ARRO.EHZ. 2020-12-02T08:57:43.21 0.1 positive manual P 230 38.4282 50 0.05 97
IT.MTCL.HGZ. 2020-12-02T08:57:43.83 0.6 undecidable manual S 334 23.5542 111 -0.43 46
IV.TERO.HHZ. 2020-12-02T08:57:43.75 0.3 undecidable manual P 117 43.8228 50 -0.23 69
IV.MF5.EHZ. 2020-12-02T08:57:42.62 0.1 positive manual P 53 34.0437 50 0.14 96
IV.MMO1.EHZ. 2020-12-02T08:57:42.90 0.3 undecidable manual S 57 19.5693 114 -0.07 75
IV.GUMA.HHZ. 2020-12-02T08:57:42.41 0.1 positive manual P 30 33.4443 50 0.02 98
IV.CAMP.HHZ. 2020-12-02T08:57:42.65 0.3 undecidable manual P 142 37.5291 50 -0.38 68
IV.CSP1.EHZ. 2020-12-02T08:57:42.09 0.1 positive manual P 11 32.6451 50 -0.18 95
IV.CESI.HHZ. 2020-12-02T08:57:41.46 0.1 positive manual P 321 28.749 107 -0.09 98
IV.MC2.EHZ. 2020-12-02T08:57:41.30 0.3 undecidable manual S 23 13.0758 124 0.29 72
IV.MTRA.EHZ. 2020-12-02T08:57:40.37 0.1 positive manual P 103 22.6551 111 -0.03 100
IT.MTCL.HGZ. 2020-12-02T08:57:40.50 0.3 undecidable manual P 334 23.5542 111 -0.07 74
IV.SMA1.EHZ. 2020-12-02T08:57:40.88 0.3 undecidable manual P 138 25.6521 109 -0.08 74
IV.T1299.HNN. 2020-12-02T08:57:40.71 0.3 undecidable manual P 146 22.6551 111 0.31 71
IV.LNSS.HHZ. 2020-12-02T08:57:40.64 0.1 undecidable manual P 197 23.2545 111 0.13 98
IV.FDMO.HHZ. 2020-12-02T08:57:40.98 0.3 undecidable manual P 353 26.0517 109 -0.07 74
IV.MC2.EHZ. 2020-12-02T08:57:39.08 0.1 negative manual P 23 13.0758 124 0.39 94
IV.MMO1.EHZ. 2020-12-02T08:57:39.91 0.1 positive manual P 57 19.5693 114 0.08 99
IV.NRCA.HHZ. 2020-12-02T08:57:38.80 0.3 undecidable manual S 345 3.4965 158 -0.03 77
IV.NRCA.HHZ. 2020-12-02T08:57:37.78 0.1 negative manual P 345 3.4965 158 0.34 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:0.0 0.011511155 0.1472 AML other m 2020-12-02T08:57:39.00
IV.NRCA.HHE. ML:0.0 0.011879190000000001 0.1408 AML other m 2020-12-02T08:57:38.00
IV.MTRA.HNE. ML:1.9 0.0005813486 0.2816 AML other m 2020-12-02T08:57:44.12
IV.MTRA.EHE. ML:1.9 0.0005912159 0.2816 AML other m 2020-12-02T08:57:44.12
IV.MTRA.HNN. ML:2.0 0.0007172322499999999 0.2304 AML other m 2020-12-02T08:57:44.41
IV.MTRA.EHN. ML:2.0 0.0007106469 0.2432 AML other m 2020-12-02T08:57:44.41
IV.FDMO.HHE. ML:1.5 0.00019999999999999998 1.02 AML other m 2020-12-02T08:57:45.46
IV.CESI.HHE. ML:1.8 0.00032 0.34 AML other m 2020-12-02T08:57:46.25
IV.CESI.HHN. ML:1.8 0.00033850000000000004 0.52 AML other m 2020-12-02T08:57:46.44
IV.FDMO.HHN. ML:1.5 0.00018972650000000001 0.3584 AML other m 2020-12-02T08:57:45.00
IV.SMA1.EHE. ML:1.6 0.00025270170000000005 0.3456 AML other m 2020-12-02T08:57:48.39
IV.SMA1.EHN. ML:1.6 0.0002455 0.36 AML other m 2020-12-02T08:57:49.57
IV.TERO.HHN. ML:1.7 0.00014549999999999999 0.06 AML other m 2020-12-02T08:57:50.00
IV.TERO.HHE. ML:1.7 0.00015400000000000003 0.74 AML other m 2020-12-02T08:57:50.40
IV.CESI.HNE. ML:1.8 0.00029580385 0.4416 AML other m 2020-12-02T08:57:46.25
IV.CESI.HNN. ML:1.8 0.00032982395 0.512 AML other m 2020-12-02T08:57:46.44
IV.MF5.EHN. ML:1.9 0.00036095155 3.5968 AML other m 2020-12-02T08:57:55.70
IV.MF5.EHE. ML:1.8 0.0002968081 2.08 AML other m 2020-12-02T08:57:55.37
IV.CAMP.HHE. ML:1.3 0.0000767667 2.3808 AML other m 2020-12-02T08:57:54.16
IV.CAMP.HHN. ML:1.3 0.00007034577 2.1184 AML other m 2020-12-02T08:57:53.21
IV.TERO.HNN. ML:1.8 0.0001754513005 7.456 AML other m 2020-12-02T08:58:04.57
IV.TERO.HNE. ML:1.8 0.00018430762 1.8688 AML other m 2020-12-02T08:58:02.32
IV.ASSB.HHE. ML:1.5 0.00009893797999999999 0.256 AML other m 2020-12-02T08:57:51.01
IV.ASSB.HHN. ML:1.6 0.00010472956 1.12 AML other m 2020-12-02T08:57:53.34
IV.SNTG.HHN. ML:1.6 0.00010220725 2.2208 AML other m 2020-12-02T08:57:45.74
IV.SNTG.HNE. ML:1.9 0.00020304585 2.912 AML other m 2020-12-02T08:57:47.02
IV.SNTG.HNN. ML:1.9 0.00021490655 3.0208 AML other m 2020-12-02T08:58:00.05
IV.SNTG.HHE. ML:1.7 0.00013232635 3.68 AML other m 2020-12-02T08:57:47.55
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