Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 01-02-2021 and time 00:46:10 (UTC) in region 3 km NE Cerreto di Spoleto (PG)

A magnitude ML 1.4 earthquake occured in region: 3 km NE Cerreto di Spoleto (PG), on

  • 01-02-2021 00:46:10 (UTC)
  • 01-02-2021 01:46:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8380, 12.9400 at 11 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
Cerreto di Spoleto PG 3 1075 1075
Sellano PG 6 1079 2154
Preci PG 9 724 2878
Vallo di Nera PG 10 364 3242
Campello sul Clitunno PG 13 2442 5684
Norcia PG 14 4957 10641
Poggiodomo PG 14 117 10758
Sant'Anatolia di Narco PG 14 564 11322
Cascia PG 15 3217 14539
Visso MC 16 1107 15646
Trevi PG 16 8469 24115
Scheggino PG 16 461 24576
Monte Cavallo MC 18 145 24721
Castelsantangelo sul Nera MC 19 281 25002
Spoleto PG 20 38218 63220

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SE of Foligno (57155 inhabitants)
39 Km NE of Terni (111501 inhabitants)
54 Km SE of Perugia (166134 inhabitants)
66 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km N of Tivoli (56533 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
Bulletin
Rev1000 		ML 1.4 2021-02-01
00:46:10		 42.8377 12.9397 11 2021-07-12
16:54:56		 Bollettino Sismico Italiano INGV 86758121
Reviewed
Rev100 		ML 1.4 2021-02-01
00:46:10		 42.8382 12.9388 11 2021-02-01
01:01:58		 Sala Sismica INGV-Roma 86747161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-01 00:46:10 ± 0.04
Latitude 42.8377 ± 0.0018
Longitude 12.9397 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86758121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 238
Semi-minor axis of confidence ellipse (meter) 178
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 104
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
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) 0.12770
Epicentral distance of station farthest from the epicenter (degree) 0.50542
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 86758121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-01 01:32:09

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 86747161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-01 01:01:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-01T00:46:28.27 0.6 undecidable manual S 13 56.0994 50 0.68 40
IV.GUMA.HHE. 2021-02-01T00:46:23.84 0.6 undecidable manual S 52 40.626 50 0.36 45
IV.CSP1.EHZ. 2021-02-01T00:46:22.13 0.6 undecidable manual S 37 35.4423 50 0.04 49
IV.MMO1.EHZ. 2021-02-01T00:46:21.05 0.6 undecidable manual S 78 32.2455 50 -0.17 48
IV.ARRO.EHN. 2021-02-01T00:46:21.07 0.6 undecidable manual S 206 31.9458 50 -0.09 48
IV.EL6.EHZ. 2021-02-01T00:46:20.11 0.3 undecidable manual P 13 56.0994 50 -0.07 70
IV.ASSB.HHZ. 2021-02-01T00:46:20.99 0.6 undecidable manual S 315 32.2455 50 -0.23 47
IV.MOMA.HHZ. 2021-02-01T00:46:20.72 0.6 undecidable manual S 263 30.3474 50 0.01 49
IV.FDMO.HHZ. 2021-02-01T00:46:19.12 0.6 undecidable manual S 28 25.1526 50 -0.2 48
IV.LNSS.HHZ. 2021-02-01T00:46:19.66 0.6 undecidable manual S 162 27.3504 50 -0.25 47
IT.FOPC.HGE. 2021-02-01T00:46:19.09 0.6 undecidable manual S 307 24.1536 50 0.02 50
IV.ATCC.EHZ. 2021-02-01T00:46:18.72 0.3 undecidable manual P 328 45.621 50 0.16 70
IV.GUMA.HHE. 2021-02-01T00:46:17.65 0.3 undecidable manual P 52 40.626 50 -0.15 71
IV.SMA1.EHE. 2021-02-01T00:46:17.85 0.3 undecidable manual P 125 39.627 50 0.22 70
IT.MTCL.HGN. 2021-02-01T00:46:17.12 0.6 undecidable manual S 16 17.9709 120 -0.17 49
IV.CESI.HHZ. 2021-02-01T00:46:17.43 0.6 undecidable manual S 351 18.7701 119 -0.09 49
IV.ASSB.HHZ. 2021-02-01T00:46:16.33 0.1 undecidable manual P 315 32.2455 50 -0.17 95
IV.CSP1.EHZ. 2021-02-01T00:46:16.91 0.1 undecidable manual P 37 35.4423 50 -0.09 96
IV.MOMA.HHZ. 2021-02-01T00:46:16.44 0.3 undecidable manual P 263 30.3474 50 0.24 71
IV.NRCA.HHZ. 2021-02-01T00:46:16.10 0.3 undecidable manual S 92 14.1747 127 -0.09 75
IV.FEMA.HNN. 2021-02-01T00:46:16.94 0.6 undecidable manual S 33 16.4724 123 0.11 49
IV.MMO1.EHZ. 2021-02-01T00:46:16.51 0.3 undecidable manual P 78 32.2455 50 0.01 74
IV.GAVE.EHZ. 2021-02-01T00:46:16.76 0.6 undecidable manual S 193 16.5723 123 -0.1 50
IV.ARRO.EHN. 2021-02-01T00:46:16.60 0.1 undecidable manual P 206 31.9458 50 0.14 96
IT.FOPC.HGE. 2021-02-01T00:46:15.19 0.3 undecidable manual P 307 24.1536 50 -0.07 74
IV.FDMO.HHZ. 2021-02-01T00:46:15.28 0.1 undecidable manual P 28 25.1526 50 -0.12 97
IV.LNSS.HHZ. 2021-02-01T00:46:15.62 0.3 undecidable manual P 162 27.3504 50 -0.12 73
IV.GAVE.EHZ. 2021-02-01T00:46:14.10 0.1 positive manual P 193 16.5723 123 0.12 99
IT.MTCL.HGN. 2021-02-01T00:46:14.13 0.3 undecidable manual P 16 17.9709 120 -0.1 74
IV.CESI.HHZ. 2021-02-01T00:46:14.40 0.1 positive manual P 351 18.7701 119 0.04 100
IV.FEMA.HNN. 2021-02-01T00:46:14.09 0.3 undecidable manual P 33 16.4724 123 0.13 74
IV.NRCA.HHZ. 2021-02-01T00:46:13.67 0.1 negative manual P 92 14.1747 127 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.6 0.0004115 0.12 AML other m 2021-02-01T00:46:16.24
IV.NRCA.HHE. ML:1.3 0.0001795 1.56 AML other m 2021-02-01T00:46:16.88
IV.GAVE.EHE. ML:1.4 0.0002055 0.32 AML other m 2021-02-01T00:46:17.18
IV.GAVE.EHN. ML:1.2 0.0001395 0.14 AML other m 2021-02-01T00:46:17.39
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