Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 26-01-2021 and time 18:12:18 (UTC) in region 1 km W Preci (PG)

A magnitude ML 1.0 earthquake occured in region: 1 km W Preci (PG), on

  • 26-01-2021 18:12:18 (UTC)
  • 26-01-2021 19:12:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8740, 13.0260 at 13 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
Preci PG 1 724 724
Visso MC 8 1107 1831
Sellano PG 8 1079 2910
Norcia PG 11 4957 7867
Cerreto di Spoleto PG 11 1075 8942
Castelsantangelo sul Nera MC 11 281 9223
Ussita MC 12 444 9667
Monte Cavallo MC 14 145 9812
Cascia PG 17 3217 13029
Vallo di Nera PG 18 364 13393
Fiordimonte MC 19 202 13595
Pieve Torina MC 19 1458 15053
Poggiodomo PG 19 117 15170

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
58 Km E of Perugia (166134 inhabitants)
60 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
100 Km N of Guidonia Montecelio (88673 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 1.0 2021-01-26
18:12:18		 42.8742 13.0258 13 2021-01-26
18:19:48		 Sala Sismica INGV-Roma 86608451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-26 18:12:18 ± 0.07
Latitude 42.8742 ± 0.0036
Longitude 13.0258 ± 0.0037
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86608451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 359
Semi-minor axis of confidence ellipse (meter) 286
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 131
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.12501
Epicentral distance of station farthest from the epicenter (degree) 0.25361
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 86608451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 18:19:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-01-26T18:12:29.15 0.3 undecidable manual S 31 28.1496 96 0.25 70
IV.MMO1.EHZ. 2021-01-26T18:12:27.75 0.3 undecidable manual S 83 24.6531 98 -0.21 71
IV.GAVE.EHZ. 2021-01-26T18:12:27.49 0.3 undecidable manual S 208 22.8549 99 0.01 74
IV.CESI.HHZ. 2021-01-26T18:12:26.00 0.3 undecidable manual S 326 17.5713 106 -0.1 74
IV.FDMO.HHZ. 2021-01-26T18:12:26.22 0.3 undecidable manual S 15 18.6702 104 -0.18 73
IV.MC2.EHZ. 2021-01-26T18:12:25.28 0.3 undecidable manual S 73 13.875 116 0.09 75
IV.MMO1.EHZ. 2021-01-26T18:12:24.05 0.1 undecidable manual P 83 24.6531 98 -0.08 98
IV.CSP1.EHZ. 2021-01-26T18:12:24.62 0.1 undecidable manual P 31 28.1496 96 -0.06 98
IV.GAVE.EHZ. 2021-01-26T18:12:23.93 0.1 undecidable manual P 208 22.8549 99 0.07 97
IV.CESI.HHZ. 2021-01-26T18:12:23.14 0.3 negative manual P 326 17.5713 106 0.09 74
IV.FDMO.HHZ. 2021-01-26T18:12:23.20 0.1 undecidable manual P 15 18.6702 104 -0.03 100
IV.MC2.EHZ. 2021-01-26T18:12:22.85 1.0 undecidable manual P 73 13.875 116 0.32 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.7 0.000033214405000000005 0.1024 AML other m 2021-01-26T18:12:26.32
IV.CESI.HHN. ML:0.8 0.0000465075 0.3072 AML other m 2021-01-26T18:12:26.24
IV.CESI.HNE. ML:1.2 0.00012187646000000002 1.0112 AML other m 2021-01-26T18:12:34.71
IV.CESI.HNN. ML:1.3 0.00014205356 0.896 AML other m 2021-01-26T18:12:28.25
IV.FDMO.HHE. ML:1.1 0.000084220625 0.2304 AML other m 2021-01-26T18:12:26.57
IV.FDMO.HHN. ML:0.7 0.000035727165 0.1152 AML other m 2021-01-26T18:12:26.50
IV.GAVE.EHE. ML:0.8 0.000041078025000000004 0.2048 AML other m 2021-01-26T18:12:27.93
IV.GAVE.EHN. ML:0.8 0.000036457165 0.1792 AML other m 2021-01-26T18:12:28.21
IV.GAVE.HNE. ML:1.2 0.00009489333499999999 0.7168 AML other m 2021-01-26T18:12:31.08
IV.GAVE.HNN. ML:1.5 0.00020160709999999998 0.832 AML other m 2021-01-26T18:12:27.51
IV.CSP1.EHE. ML:1.3 0.00009905642000000001 1.3824 AML other m 2021-01-26T18:12:39.07
IV.CSP1.EHN. ML:0.8 0.00003491122 0.6144 AML other m 2021-01-26T18:12:35.58
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