Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 06-01-2021 and time 18:37:21 (UTC) in region 1 km S Norcia (PG)

A magnitude ML 0.7 earthquake occured in region: 1 km S Norcia (PG), on

  • 06-01-2021 18:37:21 (UTC)
  • 06-01-2021 19:37:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7860, 13.0950 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 1 4957 4957
Cascia PG 10 3217 8174
Preci PG 11 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Cerreto di Spoleto PG 15 1075 10254
Poggiodomo PG 15 117 10371
Accumoli RI 16 667 11038
Visso MC 16 1107 12145
Arquata del Tronto AP 17 1178 13323
Sellano PG 18 1079 14402
Ussita MC 18 444 14846
Monteleone di Spoleto PG 19 599 15445
Vallo di Nera PG 19 364 15809
Cittareale RI 19 482 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km SW of Ancona (100861 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
Reviewed
Rev100 		ML 0.7 2021-01-06
18:37:21		 42.7862 13.0947 10 2021-01-06
18:42:43		 Sala Sismica INGV-Roma 86054221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-06 18:37:21 ± 0.11
Latitude 42.7862 ± 0.0063
Longitude 13.0947 ± 0.0159
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86054221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1299
Semi-minor axis of confidence ellipse (meter) 654
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 105
Circular confidence region, given by single value of horizontal uncertainty (meter) 1300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.40919
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 86054221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-06 18:42:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHE. 2021-01-06T18:37:36.87 0.6 undecidable manual S 309 45.4212 50 0.41 43
IV.CESI.HHN. 2021-01-06T18:37:32.09 0.6 undecidable manual S 328 28.749 50 0.09 48
IV.FDMO.HHZ. 2021-01-06T18:37:31.27 0.6 undecidable manual S 359 27.75 50 -0.47 44
IV.LNSS.HHZ. 2021-01-06T18:37:30.07 0.6 undecidable manual S 192 20.868 115 0.49 44
IV.ASSB.HHE. 2021-01-06T18:37:29.61 0.1 undecidable manual P 309 45.4212 50 -0.57 82
IV.CSP1.EHZ. 2021-01-06T18:37:29.08 0.1 undecidable manual P 15 35.0427 50 0.5 86
IV.MC2.EHZ. 2021-01-06T18:37:28.51 0.3 undecidable manual S 29 15.873 122 0.44 68
IV.CESI.HHN. 2021-01-06T18:37:27.51 0.1 undecidable manual P 328 28.749 50 -0.1 95
IV.FDMO.HHZ. 2021-01-06T18:37:27.57 0.1 undecidable manual P 359 27.75 50 0.12 95
IV.T1299.HNZ. 2021-01-06T18:37:26.26 0.1 undecidable manual P 138 22.755 113 -0.3 92
IV.LNSS.HHZ. 2021-01-06T18:37:26.27 0.1 undecidable manual P 192 20.868 115 0.07 97
IV.MMO1.EHZ. 2021-01-06T18:37:26.40 0.1 undecidable manual P 56 22.6551 113 -0.14 95
IV.MC2.EHZ. 2021-01-06T18:37:25.34 0.1 undecidable manual P 29 15.873 122 0.01 99
IV.NRCA.HHZ. 2021-01-06T18:37:25.00 0.6 undecidable manual S 17 5.4945 151 -0.49 45
IV.NRCA.HHZ. 2021-01-06T18:37:23.88 0.1 undecidable manual P 17 5.4945 151 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.1 0.0001928571 0.1024 AML other m 2021-01-06T18:37:25.30
IV.NRCA.HHN. ML:0.8 0.00010749015000000001 0.1024 AML other m 2021-01-06T18:37:25.19
IV.LNSS.HHE. ML:0.6 0.000026992255 0.1408 AML other m 2021-01-06T18:37:30.21
IV.LNSS.HHN. ML:0.6 0.000030027390000000003 1.2416 AML other m 2021-01-06T18:37:30.39
IV.FDMO.HHE. ML:0.3 0.0000090526275 0.2048 AML other m 2021-01-06T18:37:31.83
IV.FDMO.HHN. ML:0.8 0.00002871338 4.0576 AML other m 2021-01-06T18:37:32.40
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