Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 15-02-2021 and time 12:10:46 (Italy) in region 1 km E Spoleto (PG)

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

  • 15-02-2021 11:10:46 (UTC)
  • 15-02-2021 12:10:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7390, 12.7520 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
Spoleto PG 1 38218 38218
Sant'Anatolia di Narco PG 7 564 38782
Scheggino PG 7 461 39243
Campello sul Clitunno PG 9 2442 41685
Vallo di Nera PG 10 364 42049
Castel Ritaldi PG 11 3278 45327
Ferentillo TR 13 1913 47240
Poggiodomo PG 15 117 47357
Trevi PG 16 8469 55826
Montefranco TR 16 1276 57102
Cerreto di Spoleto PG 16 1075 58177
Arrone TR 17 2763 60940
Acquasparta TR 18 4778 65718
Giano dell'Umbria PG 18 3846 69564
Polino TR 19 233 69797
Monteleone di Spoleto PG 19 599 70396
Montefalco PG 19 5679 76075
Massa Martana PG 19 3770 79845

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Terni (111501 inhabitants)
25 Km S of Foligno (57155 inhabitants)
51 Km SE of Perugia (166134 inhabitants)
64 Km NE of Viterbo (67173 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
78 Km W of Teramo (54892 inhabitants)
82 Km N of Guidonia Montecelio (88673 inhabitants)
86 Km N of Tivoli (56533 inhabitants)
97 Km N of Roma (2864731 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 2021-02-15
11:10:46		 42.739 12.7523 10 2021-02-15
11:21:55		 Sala Sismica INGV-Roma 87178411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-15 11:10:46 ± 0.03
Latitude 42.7390 ± 0.0018
Longitude 12.7523 ± 0.0024
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 87178411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 204
Semi-minor axis of confidence ellipse (meter) 148
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 200.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.07
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28778
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 87178411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-15 11:21:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2021-02-15T11:11:01.58 3.0 negative manual P -0.01 0
IV.CESI.HHZ. 2021-02-15T11:10:57.95 0.3 undecidable manual S 23 31.9458 50 0.05 73
IV.LNSS.HHZ. 2021-02-15T11:10:56.79 0.3 undecidable manual S 123 27.9498 50 -0.02 74
IV.CESX.HHZ. 2021-02-15T11:10:54.47 0.3 undecidable manual S 223 19.7691 117 0.07 74
IV.CESI.HHZ. 2021-02-15T11:10:53.13 0.3 undecidable manual P 23 31.9458 50 -0.03 73
IV.MOMA.HHZ. 2021-02-15T11:10:53.39 0.3 undecidable manual S 296 16.4724 121 0 76
IV.GAVE.EHZ. 2021-02-15T11:10:52.23 0.3 undecidable manual S 114 12.6762 129 -0.08 75
IV.LNSS.HHZ. 2021-02-15T11:10:52.51 0.3 undecidable manual P 123 27.9498 50 -0.02 74
IV.CESX.HHZ. 2021-02-15T11:10:51.08 0.3 undecidable manual P 223 19.7691 117 -0.06 74
IV.GAVE.EHZ. 2021-02-15T11:10:50.08 0.3 undecidable manual P 114 12.6762 129 0.15 74
IV.MOMA.HHZ. 2021-02-15T11:10:50.52 0.1 undecidable manual P 296 16.4724 121 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:0.7 0.00005466155 0.2176 AML other m 2021-02-15T11:10:52.82
IV.GAVE.EHN. ML:0.7 0.00005748513 0.1984 AML other m 2021-02-15T11:10:53.47
IV.MOMA.HHE. ML:0.6 0.000036650490000000004 0.1408 AML other m 2021-02-15T11:10:54.10
IV.MOMA.HHN. ML:0.7 0.000038352579999999995 0.16 AML other m 2021-02-15T11:10:53.56
IV.CESI.HHE. ML:0.5 0.000014225094999999998 0.0768 AML other m 2021-02-15T11:10:58.17
IV.CESI.HHN. ML:1.0 0.00003925099 0.1024 AML other m 2021-02-15T11:10:58.12
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