Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 25-01-2021 and time 08:27:19 (UTC) in region 3 km E Vallo di Nera (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km E Vallo di Nera (PG), on

  • 25-01-2021 08:27:19 (UTC)
  • 25-01-2021 09:27:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7630, 12.8920 at 9 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
Vallo di Nera PG 3 364 364
Sant'Anatolia di Narco PG 6 564 928
Poggiodomo PG 7 117 1045
Cerreto di Spoleto PG 7 1075 2120
Scheggino PG 7 461 2581
Cascia PG 11 3217 5798
Campello sul Clitunno PG 11 2442 8240
Spoleto PG 13 38218 46458
Monteleone di Spoleto PG 13 599 47057
Sellano PG 14 1079 48136
Norcia PG 17 4957 53093
Trevi PG 17 8469 61562
Preci PG 18 724 62286
Ferentillo TR 18 1913 64199
Castel Ritaldi PG 19 3278 67477
Polino TR 20 233 67710

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SE of Foligno (57155 inhabitants)
30 Km NE of Terni (111501 inhabitants)
56 Km SE of Perugia (166134 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
67 Km W of Teramo (54892 inhabitants)
75 Km NE of Viterbo (67173 inhabitants)
86 Km N of Guidonia Montecelio (88673 inhabitants)
89 Km N of Tivoli (56533 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 2021-01-25
08:27:19		 42.7628 12.8923 9 2021-01-25
08:42:26		 Sala Sismica INGV-Roma 86555111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-25 08:27:19 ± 0.1
Latitude 42.7628 ± 0.0054
Longitude 12.8923 ± 0.0086
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86555111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 589
Semi-minor axis of confidence ellipse (meter) 542
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 130
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
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 36
Number of defining phases 19
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40020
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 86555111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-25 08:42:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SL.LJU.BHZ. 2021-01-25T08:28:52.42 3.0 undecidable manual Sg 11.14 0
IV.GIZZ.HHZ. 2021-01-25T08:28:40.50 3.0 negative manual Pg 17.98 0
IV.VITU.HHZ. 2021-01-25T08:28:37.80 3.0 undecidable manual Sg 8.5 0
IV.MILZ.HHZ. 2021-01-25T08:28:29.46 3.0 undecidable manual Pn 5.05 0
IV.CADC.HNZ. 2021-01-25T08:28:07.54 3.0 undecidable manual Sn -5.65 0
IV.SALB.HHZ. 2021-01-25T08:28:05.22 3.0 undecidable manual Pn -9.55 0
IV.NDIM.HNZ. 2021-01-25T08:27:51.21 3.0 undecidable manual Sn -7.26 0
IV.SBPO.HNZ. 2021-01-25T08:27:42.03 3.0 positive manual Pg 7.1 0
IV.MILN.HHZ. 2021-01-25T08:27:42.56 3.0 positive manual Pn -2.73 0
IV.BSSO.HHZ. 2021-01-25T08:27:39.05 3.0 undecidable manual Pn -8.28 0
IV.SAP2.EHZ. 2021-01-25T08:27:37.73 3.0 undecidable manual Sn -9.99 0
IV.SMA1.EHZ. 2021-01-25T08:27:33.28 0.6 undecidable manual S 112 39.0276 50 0.61 42
IV.MMO1.EHE. 2021-01-25T08:27:32.42 0.3 undecidable manual S 67 38.4282 50 -0.1 71
IV.FDMO.HHZ. 2021-01-25T08:27:31.10 0.3 undecidable manual S 27 34.2435 50 -0.3 69
IV.MF5.EHZ. 2021-01-25T08:27:30.31 3.0 undecidable manual P 0
IV.CESI.HHZ. 2021-01-25T08:27:29.43 0.3 undecidable manual S 2 26.8509 109 0.14 72
IV.MOMA.HNN. 2021-01-25T08:27:29.47 0.6 undecidable manual S 280 26.6511 109 0.26 47
IV.FOSV.EHZ. 2021-01-25T08:27:28.01 3.0 undecidable manual P 0
IV.SMA1.EHZ. 2021-01-25T08:27:28.03 0.1 undecidable manual P 112 39.0276 50 0.96 72
IV.LNSS.HHZ. 2021-01-25T08:27:27.12 0.3 undecidable manual S 146 21.4674 114 -0.42 69
IV.ARRO.EHZ. 2021-01-25T08:27:27.64 0.3 undecidable manual S 207 22.8549 112 -0.34 70
IV.CSP1.EHZ. 2021-01-25T08:27:27.61 0.1 undecidable manual P 35 44.4222 50 -0.3 90
IV.TOLF.HHZ. 2021-01-25T08:27:26.44 3.0 undecidable manual Pn -1.02 0
IV.FDMO.HHZ. 2021-01-25T08:27:26.18 0.1 undecidable manual P 27 34.2435 50 -0.16 95
IV.MMO1.EHE. 2021-01-25T08:27:26.78 0.3 undecidable manual P 67 38.4282 50 -0.2 70
IV.NRCA.HHE. 2021-01-25T08:27:26.97 0.6 undecidable manual S 66 19.6692 115 -0.01 50
IV.CESI.HHZ. 2021-01-25T08:27:25.27 0.1 undecidable manual P 2 26.8509 109 0.15 96
IV.MOMA.HNN. 2021-01-25T08:27:25.13 0.1 undecidable manual P 280 26.6511 109 0.06 98
IV.LNSS.HHZ. 2021-01-25T08:27:24.11 0.1 undecidable manual P 146 21.4674 114 0 100
IV.ARRO.EHZ. 2021-01-25T08:27:24.01 0.1 undecidable manual P 207 22.8549 112 -0.35 93
IV.GAVE.EHZ. 2021-01-25T08:27:23.83 0.6 undecidable manual S 179 7.7811 140 0.19 49
IV.NRCA.HHE. 2021-01-25T08:27:23.62 0.1 undecidable manual P 66 19.6692 115 -0.16 97
IV.GAVE.EHZ. 2021-01-25T08:27:22.25 0.1 undecidable manual P 179 7.7811 140 0.39 94
IV.BRSN.HNZ. 2021-01-25T08:27:22.10 3.0 undecidable manual P -5.71 0
IV.FIR.HHZ. 2021-01-25T08:27:20.35 3.0 undecidable manual P -2.32 0
IV.CPGN.EHZ. 2021-01-25T08:27:15.82 3.0 undecidable manual P -9.43 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:0.7 0.000037368965000000005 1.376 AML other m 2021-01-25T08:27:28.13
IV.ARRO.EHN. ML:1.1 0.00007956351 2.8416 AML other m 2021-01-25T08:27:29.41
IV.LNSS.HHE. ML:1.2 0.00012656145000000001 0.096 AML other m 2021-01-25T08:27:27.72
IV.LNSS.HHN. ML:1.1 0.00008840865 0.1024 AML other m 2021-01-25T08:27:28.78
IV.CESI.HHE. ML:1.0 0.00005414747 2.1568 AML other m 2021-01-25T08:27:29.69
IV.CESI.HHN. ML:0.7 0.000031703549999999996 0.16 AML other m 2021-01-25T08:27:30.61
IV.FDMO.HHE. ML:1.1 0.000048873949999999996 6.7648 AML other m 2021-01-25T08:27:28.10
IV.FDMO.HHN. ML:0.8 0.000023107324999999996 0.1408 AML other m 2021-01-25T08:27:31.52
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