Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 21-09-2021 and time 07:41:17 (Italy) in region 2 km E Vajont (PN)

A magnitude ML 1.3 earthquake occured in region: 2 km E Vajont (PN), on

  • 21-09-2021 05:41:17 (UTC)
  • 21-09-2021 07:41:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.1460, 12.7270 at 15 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
Vajont PN 2 1719 1719
Maniago PN 3 11698 13417
Arba PN 5 1309 14726
Fanna PN 5 1583 16309
Montereale Valcellina PN 6 4433 20742
Cavasso Nuovo PN 6 1525 22267
Frisanco PN 8 622 22889
Sequals PN 8 2200 25089
Vivaro PN 9 1352 26441
Meduno PN 9 1574 28015
Andreis PN 11 259 28274
San Quirino PN 13 4383 32657
Travesio PN 13 1776 34433
Barcis PN 14 256 34689
Aviano PN 14 9106 43795
Spilimbergo PN 14 12124 55919
Castelnovo del Friuli PN 15 880 56799
San Giorgio della Richinvelda PN 16 4650 61449
Tramonti di Sotto PN 16 387 61836
Roveredo in Piano PN 17 5967 67803
Clauzetto PN 17 380 68183
Cordenons PN 18 18301 86484
Pinzano al Tagliamento PN 18 1525 88009
San Martino al Tagliamento PN 18 1468 89477
Dignano UD 18 2317 91794
Budoia PN 19 2569 94363
Tramonti di Sopra PN 19 321 94684
Valvasone Arzene PN 20 3988 98672
Ragogna UD 20 2909 101581

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km N of Pordenone (51229 inhabitants)
40 Km W of Udine (99169 inhabitants)
65 Km NE of Treviso (83731 inhabitants)
85 Km NE of Venezia (263352 inhabitants)
98 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 1.3 2021-09-21
05:41:17		 46.1462 12.7267 15 2022-03-30
13:04:25		 Bollettino Sismico Italiano INGV 99257881
Reviewed
Rev100 		ML 1.4 2021-09-21
05:41:16		 46.0985 12.7258 20 2021-09-21
06:32:08		 Sala Sismica INGV-Roma 95686251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 05:41:17 ± 0.2
Latitude 46.1462 ± 0.0099
Longitude 12.7267 ± 0.0104
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99257881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1076
Semi-minor axis of confidence ellipse (meter) 473
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 354
Circular confidence region, given by single value of horizontal uncertainty (meter) 1080.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.63582
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 99257881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-02 17:59:49

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 95686251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-21 06:32:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.DRE.HNZ. 2021-09-21T05:41:30.94 0.6 undecidable manual P 87 70.5738 94 0.82 38
NI.PURA.HHE. 2021-09-21T05:41:29.56 0.1 undecidable manual S 2 31.0467 101 0.92 77
OX.CLUD.HHZ. 2021-09-21T05:41:29.78 0.6 undecidable manual S 19 36.4413 99 -0.28 47
OX.CIMO.HHZ. 2021-09-21T05:41:28.04 0.3 undecidable manual S 310 28.3494 103 0.1 100
OX.CAE.HHZ. 2021-09-21T05:41:27.42 0.6 undecidable manual S 236 26.9508 104 -0.15 48
OX.MPRI.HHZ. 2021-09-21T05:41:26.65 0.6 undecidable manual S 62 22.6551 109 0.19 99
OX.FUSE.HHZ. 2021-09-21T05:41:24.37 0.6 negative manual P 35 36.4413 99 -0.5 44
IV.FREG.EHE. 2021-09-21T05:41:24.88 0.6 undecidable manual P 245 35.1426 99 0.19 49
OX.CLUD.HHZ. 2021-09-21T05:41:24.60 1.0 undecidable manual P 19 36.4413 99 -0.28 23
IV.STAL.HHZ. 2021-09-21T05:41:23.62 0.3 undecidable manual S 354 12.6762 129 -0.51 69
OX.CIMO.HHZ. 2021-09-21T05:41:23.69 0.3 undecidable manual P 310 28.3494 103 0.04 76
OX.MLN.HHZ. 2021-09-21T05:41:23.67 0.3 undecidable manual S 272 8.5803 143 0.31 75
NI.PURA.HHE. 2021-09-21T05:41:23.89 0.6 undecidable manual P 2 31.0467 101 -0.17 48
OX.MPRI.HHZ. 2021-09-21T05:41:22.54 0.3 undecidable manual P 62 22.6551 109 -0.26 72
OX.CAE.HHZ. 2021-09-21T05:41:22.23 1.0 undecidable manual P 236 26.9508 104 -1.21 16
OX.MLN.HHZ. 2021-09-21T05:41:21.03 0.3 undecidable manual P 272 8.5803 143 0.02 78
IV.STAL.HHZ. 2021-09-21T05:41:21.06 0.1 undecidable manual P 354 12.6762 129 -0.39 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.STAL.HNN. ML:1.7 0.00047945759999999996 0.24 AML other m 2021-09-21T05:41:23.79
OX.MLN.HHE. ML:1.0 0.0001084871 0.0992 AML other m 2021-09-21T05:41:24.58
IV.STAL.HHN. ML:1.6 0.00038700000000000003 0.28 AML other m 2021-09-21T05:41:24.63
IV.STAL.HNE. ML:1.7 0.000461767 0.192 AML other m 2021-09-21T05:41:24.87
IV.STAL.HHE. ML:1.7 0.00046055795 0.1792 AML other m 2021-09-21T05:41:24.90
OX.MLN.HHN. ML:1.1 0.00013220000000000001 0.24 AML other m 2021-09-21T05:41:25.51
OX.MPRI.HNE. ML:1.3 0.00012068131 0.24 AML other m 2021-09-21T05:41:27.53
OX.MPRI.HHE. ML:1.4 0.00016390415 0.2592 AML other m 2021-09-21T05:41:27.54
OX.CIMO.HHE. ML:1.1 0.00006185 0.1 AML other m 2021-09-21T05:41:28.27
OX.CIMO.HNE. ML:1.1 0.00005840756 0.1024 AML other m 2021-09-21T05:41:28.28
OX.CAE.HHN. ML:1.2 0.000074883595 0.3776 AML other m 2021-09-21T05:41:33.35
OX.CIMO.HHN. ML:1.2 0.00007307426 0.3584 AML other m 2021-09-21T05:41:29.94
OX.CIMO.HNN. ML:1.2 0.000073350045 0.3616 AML other m 2021-09-21T05:41:29.77
OX.CAE.HHE. ML:1.4 0.000134053545 0.3616 AML other m 2021-09-21T05:41:32.80
OX.MPRI.HHN. ML:1.7 0.000314 0.3 AML other m 2021-09-21T05:41:31.02
OX.MPRI.HNN. ML:1.6 0.000245 0.32 AML other m 2021-09-21T05:41:31.01
OX.CLUD.HHN. ML:0.7 0.00002215 0.7 AML other m 2021-09-21T05:41:31.26
OX.CLUD.HHE. ML:0.8 0.000023676905999999997 0.5184 AML other m 2021-09-21T05:41:32.55
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