Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 26-01-2021 and time 22:58:10 (UTC) in region 4 km S Norcia (PG)

A magnitude ML 1.4 earthquake occured in region: 4 km S Norcia (PG), on

  • 26-01-2021 22:58:10 (UTC)
  • 26-01-2021 23:58:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7580, 13.1060 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 4 4957 4957
Cascia PG 9 3217 8174
Accumoli RI 14 667 8841
Preci PG 15 724 9565
Poggiodomo PG 15 117 9682
Arquata del Tronto AP 16 1178 10860
Castelsantangelo sul Nera MC 16 281 11141
Cittareale RI 16 482 11623
Cerreto di Spoleto PG 17 1075 12698
Monteleone di Spoleto PG 17 599 13297
Visso MC 19 1107 14404
Vallo di Nera PG 20 364 14768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
70 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
96 Km W of Pescara (121014 inhabitants)
98 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
Reviewed
Rev100 		ML 1.4 2021-01-26
22:58:10		 42.7578 13.1063 10 2021-01-26
23:59:57		 Sala Sismica INGV-Roma 86615571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-26 22:58:10 ± 0.07
Latitude 42.7578 ± 0.0036
Longitude 13.1063 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86615571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 458
Semi-minor axis of confidence ellipse (meter) 205
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) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 25
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) 0.34804
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 86615571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 23:59:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-01-26T22:58:30.93 3.0 undecidable manual S -0.2 0
IV.MF5.EHZ. 2021-01-26T22:58:24.33 0.3 undecidable manual S 48 38.4282 50 0.89 55
IV.GUMA.HHZ. 2021-01-26T22:58:23.86 0.6 undecidable manual S 29 38.628 50 0.38 44
IV.FDMO.HHZ. 2021-01-26T22:58:21.04 0.6 undecidable manual S 357 30.9468 50 -0.4 44
IV.CESI.HHZ. 2021-01-26T22:58:21.51 0.3 undecidable manual S 329 31.9458 50 -0.2 69
IV.RM33.EHZ. 2021-01-26T22:58:20.84 0.6 undecidable manual S 162 28.9488 50 -0.07 48
IV.MMO1.EHZ. 2021-01-26T22:58:19.14 0.6 undecidable manual S 49 23.8539 113 -0.39 45
IV.SMA1.EHZ. 2021-01-26T22:58:19.64 0.3 undecidable manual S 127 23.3544 114 0.25 70
IV.MTRA.EHZ. 2021-01-26T22:58:19.04 0.3 undecidable manual S 90 23.6541 113 -0.43 67
IV.GAVE.EHZ. 2021-01-26T22:58:18.10 0.3 undecidable manual S 247 18.7701 119 0.16 72
IV.GUMA.HHZ. 2021-01-26T22:58:18.15 0.6 undecidable manual P 29 38.628 50 0.14 46
IV.MF5.EHZ. 2021-01-26T22:58:18.48 0.3 undecidable manual P 48 38.4282 50 0.5 64
IV.TERO.HHZ. 2021-01-26T22:58:18.55 3.0 undecidable manual P -0.2 0
IV.CAMP.HHZ. 2021-01-26T22:58:17.23 0.6 positive manual P 135 34.8429 50 -0.21 46
IV.CSP1.EHZ. 2021-01-26T22:58:17.77 3.0 negative manual P -0.03 0
IV.LNSS.HHZ. 2021-01-26T22:58:17.83 0.3 undecidable manual S 197 17.9709 120 0.11 72
IV.MC2.EHZ. 2021-01-26T22:58:17.98 0.3 undecidable manual S 22 18.3705 119 0.16 72
IV.ARRO.EHZ. 2021-01-26T22:58:17.60 3.0 positive manual P 0.26 0
IV.CESI.HHZ. 2021-01-26T22:58:16.72 0.3 undecidable manual P 329 31.9458 50 -0.26 69
IV.RM33.EHZ. 2021-01-26T22:58:16.24 0.1 undecidable manual P 162 28.9488 50 -0.28 91
IV.FDMO.HHZ. 2021-01-26T22:58:16.56 0.3 positive manual P 357 30.9468 50 -0.27 69
IV.SMA1.EHZ. 2021-01-26T22:58:15.64 0.3 undecidable manual P 127 23.3544 114 -0.01 73
IV.MTRA.EHZ. 2021-01-26T22:58:15.60 0.1 undecidable manual P 90 23.6541 113 -0.09 96
IV.NRCA.HNZ. 2021-01-26T22:58:15.11 0.1 undecidable manual S 4 8.3805 141 -0.02 100
IV.MMO1.EHZ. 2021-01-26T22:58:15.49 0.1 undecidable manual P 49 23.8539 113 -0.24 93
IV.LNSS.HHZ. 2021-01-26T22:58:14.83 0.3 undecidable manual P 197 17.9709 120 0.15 72
IV.MC2.EHZ. 2021-01-26T22:58:14.82 0.1 undecidable manual P 22 18.3705 119 0.09 97
IV.GAVE.EHZ. 2021-01-26T22:58:14.90 0.6 positive manual P 247 18.7701 119 0.09 48
IV.NRCA.HNZ. 2021-01-26T22:58:13.39 0.3 positive manual P 4 8.3805 141 0.2 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.000888 0.18 AML other m 2021-01-26T22:58:15.30
IV.NRCA.HHN. ML:1.6 0.0005814999999999999 0.72 AML other m 2021-01-26T22:58:15.20
IV.LNSS.HHE. ML:1.1 0.0001061 0.62 AML other m 2021-01-26T22:58:18.25
IV.LNSS.HHN. ML:1.2 0.00013000000000000002 1.26 AML other m 2021-01-26T22:58:19.13
IV.SMA1.EHE. ML:1.3 0.00011499999999999999 0.42 AML other m 2021-01-26T22:58:21.15
IV.SMA1.EHN. ML:1.2 0.00009345000000000001 0.42 AML other m 2021-01-26T22:58:22.13
IV.NRCA.HNE. ML:1.8 0.00084699965 0.1664 AML other m 2021-01-26T22:58:15.38
IV.NRCA.HNN. ML:1.6 0.0005770310000000001 0.6528 AML other m 2021-01-26T22:58:15.49
IV.GAVE.EHE. ML:1.3 0.00015750125 3.072 AML other m 2021-01-26T22:58:18.66
IV.GAVE.EHN. ML:1.4 0.0001772217 0.1792 AML other m 2021-01-26T22:58:18.48
IV.RM33.EHE. ML:1.1 0.00006740493 0.3328 AML other m 2021-01-26T22:58:22.01
IV.RM33.EHN. ML:1.2 0.000076581175 2.4704 AML other m 2021-01-26T22:58:21.41
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