Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 11-04-2021 and time 09:20:14 (UTC) in region 4 km E Gualdo Tadino (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km E Gualdo Tadino (PG), on

  • 11-04-2021 09:20:14 (UTC)
  • 11-04-2021 11:20:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2480, 12.8280 at 8 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
Gualdo Tadino PG 4 15208 15208
Fossato di Vico PG 8 2840 18048
Esanatoglia MC 10 2034 20082
Fiuminata MC 11 1402 21484
Sigillo PG 12 2404 23888
Fabriano AN 12 31480 55368
Matelica MC 15 9981 65349
Pioraco MC 15 1134 66483
Sefro MC 15 422 66905
Cerreto d'Esi AN 15 3817 70722
Nocera Umbra PG 15 5839 76561
Costacciaro PG 16 1216 77777
Castelraimondo MC 19 4587 82364
Gagliole MC 20 620 82984

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NE of Foligno (57155 inhabitants)
39 Km E of Perugia (166134 inhabitants)
68 Km S of Fano (60888 inhabitants)
69 Km SW of Ancona (100861 inhabitants)
74 Km S of Pesaro (94582 inhabitants)
78 Km N of Terni (111501 inhabitants)
80 Km E of Arezzo (99543 inhabitants)
93 Km S of Rimini (147750 inhabitants)
97 Km NW of Teramo (54892 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 0.8 2021-04-11
09:20:14		 43.2482 12.8283 8 2021-04-11
09:46:47		 Sala Sismica INGV-Roma 88999101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-11 09:20:14 ± 0.07
Latitude 43.2482 ± 0.0036
Longitude 12.8283 ± 0.0062
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88999101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 355
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 249
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35793
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 14
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 5
Type of magnitude ML
Reference to an origin 88999101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-11 09:46:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.VRB.HGZ. 2021-04-11T09:22:10.59 3.0 undecidable manual Sn 5.27 0
IV.SENA.HHZ. 2021-04-11T09:21:55.36 3.0 undecidable manual Sn 2.7 0
IV.MRLC.HHZ. 2021-04-11T09:21:43.89 3.0 undecidable manual Sg 5.72 0
IV.VOBA.EHZ. 2021-04-11T09:21:41.05 3.0 undecidable manual Sn 3.2 0
IV.HLNI.HHZ. 2021-04-11T09:21:40.66 3.0 undecidable manual Pn 1.07 0
IV.MFNL.HHZ. 2021-04-11T09:21:32.31 3.0 positive manual Pn 1.65 0
GU.BHB.HHZ. 2021-04-11T09:21:30.85 3.0 positive manual Pg 12.67 0
GU.BLANC.HHZ. 2021-04-11T09:21:28.81 3.0 undecidable manual Pn 1.61 0
IV.NDIM.HHZ. 2021-04-11T09:21:18.37 3.0 undecidable manual Sn -0.56 0
IV.SEI.HHZ. 2021-04-11T09:20:57.54 3.0 undecidable manual Sn -1.01 0
IV.VOBA.EHZ. 2021-04-11T09:20:57.43 3.0 positive manual Pn -2.42 0
IV.MOCL.EHZ. 2021-04-11T09:20:38.73 3.0 undecidable manual Pn 0.02 0
IV.PIEI.HHZ. 2021-04-11T09:20:28.16 0.3 undecidable manual S 324 39.7269 50 0.25 69
IV.CING.HNE. 2021-04-11T09:20:26.14 0.3 undecidable manual S 64 32.8449 104 0.17 73
IV.CSP1.EHZ. 2021-04-11T09:20:26.77 0.3 undecidable manual S 120 35.0427 50 0.1 72
IV.FDMO.HHZ. 2021-04-11T09:20:25.78 0.3 undecidable manual S 138 31.4463 105 0.27 71
IV.CESI.HNZ. 2021-04-11T09:20:24.41 0.3 undecidable manual S 167 27.6501 107 0.16 73
IV.ARVD.HHZ. 2021-04-11T09:20:24.81 0.3 undecidable manual S 18 29.1486 106 0.07 75
IV.ASSB.HHZ. 2021-04-11T09:20:23.94 0.3 undecidable manual S 211 26.6511 107 0.05 74
IV.SSFR.HHN. 2021-04-11T09:20:22.54 0.3 undecidable manual S 350 21.1677 111 0.43 70
IV.PIEI.HHZ. 2021-04-11T09:20:21.89 0.1 undecidable manual P 324 39.7269 50 -0.23 95
IV.CING.HNE. 2021-04-11T09:20:21.52 0.3 undecidable manual P 64 32.8449 104 0.52 67
IV.PF6.EHE. 2021-04-11T09:20:21.33 0.3 undecidable manual P 112 32.0457 104 0.48 68
IV.MML1.HNZ. 2021-04-11T09:20:21.45 0.3 undecidable manual S 142 18.9699 113 0.07 76
IV.ATCC.EHZ. 2021-04-11T09:20:21.34 0.3 undecidable manual S 245 16.7721 116 0.64 65
IV.FDMO.HHZ. 2021-04-11T09:20:20.19 0.1 undecidable manual P 138 31.4463 105 -0.55 88
IV.FRON.EHE. 2021-04-11T09:20:20.22 0.3 undecidable manual P 345 31.0467 105 -0.43 68
IV.CSP1.EHZ. 2021-04-11T09:20:20.93 0.1 undecidable manual P 120 35.0427 50 -0.48 91
IV.ARVD.HHZ. 2021-04-11T09:20:20.07 0.1 undecidable manual P 18 29.1486 106 -0.23 95
IV.ASSB.HHZ. 2021-04-11T09:20:19.66 0.3 undecidable manual P 211 26.6511 107 -0.14 74
IV.EL6.EHN. 2021-04-11T09:20:19.77 0.6 undecidable manual P 68 23.8539 109 0.5 46
IV.CESI.HNZ. 2021-04-11T09:20:19.83 0.1 undecidable manual P 167 27.6501 107 -0.18 97
IV.MML1.HNZ. 2021-04-11T09:20:18.17 0.3 undecidable manual P 142 18.9699 113 -0.18 73
IV.ATCC.EHZ. 2021-04-11T09:20:18.07 0.1 undecidable manual P 245 16.7721 116 0.11 100
IV.SSFR.HHN. 2021-04-11T09:20:18.94 0.1 undecidable manual P 350 21.1677 111 0.17 99
IV.FOSV.EHZ. 2021-04-11T09:20:17.76 0.3 undecidable manual S 314 7.4814 138 -0.32 72
IV.FOSV.EHZ. 2021-04-11T09:20:16.13 0.1 undecidable manual P 314 7.4814 138 -0.32 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHN. ML:1.4 0.00046899999999999996 0.3 AML other m 2021-04-11T09:20:19.24
IV.FOSV.EHE. ML:1.0 0.000184 0.26 AML other m 2021-04-11T09:20:19.15
IV.ATCC.EHE. ML:0.6 0.00004050480999999999 0.2752 AML other m 2021-04-11T09:20:23.17
IV.ATCC.EHN. ML:0.6 0.000038146885000000005 0.1216 AML other m 2021-04-11T09:20:22.62
IV.FDMO.HHN. ML:0.3 0.000011739298 0.1216 AML other m 2021-04-11T09:20:25.83
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