Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 21-04-2021 and time 05:59:17 (Italy) in region 2 km NW Lusevera (UD)

A magnitude ML 0.8 earthquake occured in region: 2 km NW Lusevera (UD), on

  • 21-04-2021 03:59:17 (UTC)
  • 21-04-2021 05:59:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.2740, 13.2430 at 9 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
Lusevera UD 2 643 643
Montenars UD 5 538 1181
Tarcento UD 7 9012 10193
Magnano in Riviera UD 7 2336 12529
Artegna UD 8 2885 15414
Gemona del Friuli UD 8 10964 26378
Taipana UD 8 636 27014
Nimis UD 8 2740 29754
Venzone UD 10 2117 31871
Attimis UD 11 1805 33676
Treppo Grande UD 11 1708 35384
Buja UD 11 6563 41947
Bordano UD 12 754 42701
Cassacco UD 12 2938 45639
Resia UD 12 1033 46672
Tricesimo UD 13 7600 54272
Osoppo UD 13 2936 57208
Trasaghis UD 13 2227 59435
Resiutta UD 14 309 59744
Reana del Rojale UD 14 4966 64710
Colloredo di Monte Albano UD 14 2223 66933
Faedis UD 16 2945 69878
Moggio Udinese UD 16 1714 71592
Amaro UD 16 823 72415
Chiusaforte UD 16 672 73087
Majano UD 16 5945 79032
Pagnacco UD 17 5044 84076
Povoletto UD 18 5471 89547
Cavazzo Carnico UD 19 1052 90599
Tavagnacco UD 19 14910 105509
Moruzzo UD 19 2456 107965

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km N of Udine (99169 inhabitants)
57 Km NE of Pordenone (51229 inhabitants)
80 Km NW of Trieste (204420 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 0.8 2021-04-21
03:59:17		 46.2735 13.2432 9 2021-07-12
16:55:09		 Bollettino Sismico Italiano INGV 89765201
Reviewed
Rev100 		ML 1.0 2021-04-21
03:59:17		 46.2827 13.2467 10 2021-04-21
05:06:16		 Sala Sismica INGV-Roma 89317301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-21 03:59:17 ± 0.09
Latitude 46.2735 ± 0.0054
Longitude 13.2432 ± 0.0065
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89765201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 594
Semi-minor axis of confidence ellipse (meter) 446
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 197
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) 81
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.02968
Epicentral distance of station farthest from the epicenter (degree) 0.29498
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 89317301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-21 05:06:16

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 89765201
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-04 13:54:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.PLRO.HNZ. 2021-04-21T03:59:29.16 0.6 undecidable manual S 347 31.4463 50 0.18 47
OX.DRE.HHZ. 2021-04-21T03:59:28.81 0.6 undecidable manual S 110 32.745 50 -0.54 43
OX.PRED.HNZ. 2021-04-21T03:59:28.53 0.3 undecidable manual S 53 30.9468 50 -0.34 68
NI.PALA.HHZ. 2021-04-21T03:59:27.02 0.3 undecidable manual S 263 24.6531 111 0.08 73
OX.FUSE.HHZ. 2021-04-21T03:59:26.46 0.3 undecidable manual S 310 24.2535 111 -0.33 69
OX.MPRI.HHZ. 2021-04-21T03:59:25.70 0.6 undecidable manual S 260 19.9689 115 0.28 47
OX.PRED.HNZ. 2021-04-21T03:59:25.04 0.1 undecidable manual P 53 30.9468 50 0.86 76
OX.DRE.HHZ. 2021-04-21T03:59:24.06 0.6 undecidable manual P 110 32.745 50 -0.39 45
OX.PLRO.HNZ. 2021-04-21T03:59:24.13 0.1 undecidable manual P 347 31.4463 50 -0.12 95
IV.PTCC.HHE. 2021-04-21T03:59:24.39 0.3 undecidable manual S 30 17.0718 119 -0.16 72
NI.PALA.HHZ. 2021-04-21T03:59:23.02 1.0 undecidable manual P 263 24.6531 111 -0.04 24
OX.BOO.HNE. 2021-04-21T03:59:22.99 0.3 undecidable manual S 295 12.1767 128 -0.13 74
OX.MPRI.HHZ. 2021-04-21T03:59:22.11 0.6 negative manual P 260 19.9689 115 -0.08 49
OX.FUSE.HHZ. 2021-04-21T03:59:22.76 1.0 negative manual P 310 24.2535 111 -0.22 24
IV.PTCC.HHE. 2021-04-21T03:59:21.92 0.1 undecidable manual P 30 17.0718 119 0.23 95
OX.BAD.HNE. 2021-04-21T03:59:21.15 0.3 undecidable manual S 179 4.3956 155 -0.22 73
NI.VINO.HHZ. 2021-04-21T03:59:21.20 0.6 undecidable manual S 131 3.2967 161 -0.03 51
RF.GEPF.HHZ. 2021-04-21T03:59:21.90 0.6 undecidable manual S 271 7.9809 140 -0.16 49
RF.GEPF.HHZ. 2021-04-21T03:59:20.38 1.0 undecidable manual P 271 7.9809 140 0.13 25
OX.BOO.HNE. 2021-04-21T03:59:20.92 0.1 undecidable manual P 295 12.1767 128 0.06 99
NI.VINO.HHZ. 2021-04-21T03:59:19.99 0.1 positive manual P 131 3.2967 161 0.22 98
OX.BAD.HNE. 2021-04-21T03:59:19.95 0.1 undecidable manual P 179 4.3956 155 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
NI.VINO.HHN. ML:1.1 0.000203 0.38 AML other m 2021-04-21T03:59:21.41
NI.VINO.HHE. ML:1.2 0.000264 0.18 AML other m 2021-04-21T03:59:21.32
RF.GEPF.HHN. ML:1.4 0.000372 0.16 AML other m 2021-04-21T03:59:22.16
RF.GEPF.HHE. ML:1.3 0.00027 0.24 AML other m 2021-04-21T03:59:22.07
OX.MPRI.HHN. ML:0.7 0.0000359 1.56 AML other m 2021-04-21T03:59:26.83
OX.MPRI.HHE. ML:0.4 0.0000211 1.76 AML other m 2021-04-21T03:59:28.07
NI.PALA.HHN. ML:0.8 0.000037 0.98 AML other m 2021-04-21T03:59:28.45
NI.PALA.HHE. ML:0.8 0.0000346 1.58 AML other m 2021-04-21T03:59:30.17
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