Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 19-02-2021 and time 22:49:05 (Italy) in region 1 km E Spoleto (PG)

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

  • 19-02-2021 21:49:05 (UTC)
  • 19-02-2021 22:49:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7390, 12.7510 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 14 1913 47240
Poggiodomo PG 15 117 47357
Trevi PG 15 8469 55826
Montefranco TR 16 1276 57102
Cerreto di Spoleto PG 16 1075 58177
Arrone TR 17 2763 60940
Acquasparta TR 17 4778 65718
Giano dell'Umbria PG 18 3846 69564
Polino TR 19 233 69797
Montefalco PG 19 5679 75476
Massa Martana PG 19 3770 79246
Monteleone di Spoleto PG 19 599 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)
50 Km SE of Perugia (166134 inhabitants)
64 Km NE of Viterbo (67173 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
79 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 1.0 2021-02-19
21:49:05		 42.7393 12.7507 10 2021-02-19
21:53:30		 Sala Sismica INGV-Roma 87306461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-19 21:49:05 ± 0.04
Latitude 42.7393 ± 0.0027
Longitude 12.7507 ± 0.0049
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 87306461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 396
Semi-minor axis of confidence ellipse (meter) 260
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 24
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.48473
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 87306461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-19 21:53:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-02-19T21:49:22.81 0.6 undecidable manual S 43 53.8017 50 0.43 43
IV.RM33.EHZ. 2021-02-19T21:49:20.42 0.6 undecidable manual S 124 45.7209 50 0.19 46
IV.MC2.EHZ. 2021-02-19T21:49:19.10 0.6 undecidable manual S 62 40.4262 50 0.27 45
IV.FDMO.HHZ. 2021-02-19T21:49:19.55 1.0 undecidable manual S 40 42.8238 50 0.08 24
IV.ASSB.HHZ. 2021-02-19T21:49:17.23 0.6 undecidable manual S 348 34.4433 50 0 49
IV.NRCA.HHZ. 2021-02-19T21:49:16.21 0.6 undecidable manual S 70 31.3464 50 -0.2 47
IV.CESI.HHZ. 2021-02-19T21:49:16.48 0.6 undecidable manual S 23 32.0457 50 -0.1 48
IV.CSP1.EHZ. 2021-02-19T21:49:15.26 0.6 positive manual P 43 53.8017 50 0.09 46
IV.LNSS.HHZ. 2021-02-19T21:49:15.23 0.6 undecidable manual S 123 28.0497 50 -0.3 46
IV.SMA1.EHZ. 2021-02-19T21:49:14.67 3.0 negative manual P 0.02 0
IV.RM33.EHZ. 2021-02-19T21:49:13.72 1.0 undecidable manual P 124 45.7209 50 -0.2 23
IV.FDMO.HHZ. 2021-02-19T21:49:13.36 0.1 undecidable manual P 40 42.8238 50 -0.12 93
IV.MC2.EHZ. 2021-02-19T21:49:13.25 0.1 undecidable manual P 62 40.4262 50 0.14 93
IV.ARRO.EHZ. 2021-02-19T21:49:12.60 0.6 undecidable manual S 176 17.7711 119 0.23 48
IV.CESX.HHZ. 2021-02-19T21:49:12.93 0.6 undecidable manual S 223 19.7691 117 -0.03 50
IV.ASSB.HHZ. 2021-02-19T21:49:12.24 0.1 positive manual P 348 34.4433 50 0.05 96
IV.MOMA.HHZ. 2021-02-19T21:49:11.80 0.6 undecidable manual S 296 16.3725 121 -0.13 49
IV.LNSS.HHZ. 2021-02-19T21:49:11.05 0.1 undecidable manual P 123 28.0497 50 -0.16 95
IV.NRCA.HHZ. 2021-02-19T21:49:11.62 0.3 positive manual P 70 31.3464 50 -0.1 72
IV.CESI.HHZ. 2021-02-19T21:49:11.76 0.3 positive manual P 23 32.0457 50 -0.05 72
IV.GAVE.EHZ. 2021-02-19T21:49:10.68 0.6 undecidable manual S 114 12.7761 128 -0.24 48
IV.MOMA.HHZ. 2021-02-19T21:49:09.12 0.1 undecidable manual P 296 16.3725 121 -0.01 100
IV.ARRO.EHZ. 2021-02-19T21:49:09.70 0.6 undecidable manual P 176 17.7711 119 0.32 47
IV.CESX.HHZ. 2021-02-19T21:49:09.70 0.6 negative manual P 223 19.7691 117 -0.02 50
IV.GAVE.EHZ. 2021-02-19T21:49:08.66 0.6 positive manual P 114 12.7761 128 0.11 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.1 0.0001295 0.42 AML other m 2021-02-19T21:49:11.57
IV.GAVE.EHN. ML:1.0 0.0001079 1.04 AML other m 2021-02-19T21:49:12.12
IV.MOMA.HHE. ML:1.2 0.0001295 0.82 AML other m 2021-02-19T21:49:12.73
IV.MOMA.HHN. ML:1.1 0.0001072 1.34 AML other m 2021-02-19T21:49:12.96
IV.ARRO.EHE. ML:0.8 0.000053400000000000004 0.74 AML other m 2021-02-19T21:49:13.43
IV.ARRO.EHN. ML:0.8 0.00005069999999999999 0.14 AML other m 2021-02-19T21:49:13.46
IV.CESX.HHE. ML:0.8 0.0000487 0.6 AML other m 2021-02-19T21:49:13.39
IV.CESX.HHN. ML:0.9 0.000058099999999999996 1.16 AML other m 2021-02-19T21:49:14.58
IV.LNSS.HHN. ML:1.0 0.000048100000000000004 0.78 AML other m 2021-02-19T21:49:16.47
IV.NRCA.HHN. ML:1.1 0.00005465000000000001 0.16 AML other m 2021-02-19T21:49:16.61
IV.LNSS.HHE. ML:1.2 0.000076 0.12 AML other m 2021-02-19T21:49:16.65
IV.CESI.HHN. ML:1.2 0.0000693 0.1 AML other m 2021-02-19T21:49:16.75
IV.CESI.HHE. ML:0.8 0.000025500000000000003 0.26 AML other m 2021-02-19T21:49:16.83
IV.NRCA.HHE. ML:1.1 0.0000613 1.48 AML other m 2021-02-19T21:49:17.76
IV.FDMO.HHE. ML:0.8 0.00002135 0.18 AML other m 2021-02-19T21:49:20.17
IV.FDMO.HHN. ML:0.8 0.0000202 1.08 AML other m 2021-02-19T21:49:20.05
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