Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 21-09-2021 and time 03:13:52 (Italy) in region 1 km SW Fanna (PN)

A magnitude ML 1.7 earthquake occured in region: 1 km SW Fanna (PN), on

  • 21-09-2021 01:13:52 (UTC)
  • 21-09-2021 03:13:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.1810, 12.7490 at 11 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
Fanna PN 1 1583 1583
Cavasso Nuovo PN 2 1525 3108
Maniago PN 3 11698 14806
Frisanco PN 4 622 15428
Arba PN 5 1309 16737
Meduno PN 5 1574 18311
Vajont PN 5 1719 20030
Sequals PN 6 2200 22230
Montereale Valcellina PN 8 4433 26663
Travesio PN 10 1776 28439
Andreis PN 11 259 28698
Vivaro PN 12 1352 30050
Castelnovo del Friuli PN 12 880 30930
Tramonti di Sotto PN 12 387 31317
Clauzetto PN 14 380 31697
Spilimbergo PN 14 12124 43821
Barcis PN 15 256 44077
Tramonti di Sopra PN 15 321 44398
Pinzano al Tagliamento PN 15 1525 45923
San Quirino PN 17 4383 50306
Vito d'Asio PN 17 769 51075
Aviano PN 18 9106 60181
San Giorgio della Richinvelda PN 18 4650 64831
Ragogna UD 18 2909 67740
Forgaria nel Friuli UD 18 1786 69526
Dignano UD 18 2317 71843
San Martino al Tagliamento PN 20 1468 73311

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km N of Pordenone (51229 inhabitants)
40 Km W of Udine (99169 inhabitants)
69 Km NE of Treviso (83731 inhabitants)
89 Km NE of Venezia (263352 inhabitants)
99 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 1.7 2021-09-21
01:13:52		 46.1807 12.7487 11 2022-03-30
13:04:25		 Bollettino Sismico Italiano INGV 99256501
Reviewed
Rev100 		ML 1.7 2021-09-21
01:13:51		 46.1693 12.757 11 2021-09-21
01:31:16		 Sala Sismica INGV-Roma 95679801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 01:13:52 ± 0.08
Latitude 46.1807 ± 0.0054
Longitude 12.7487 ± 0.0065
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99256501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 670
Semi-minor axis of confidence ellipse (meter) 91
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 332
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 1.28603
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 99256501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-03 10:47:33

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 95679801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-21 01:31:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SL.LJU.BHZ. 2021-09-21T01:14:15.84 0.6 undecidable manual P 96 137.6622 50 1.03 29
IV.TREG.EHZ. 2021-09-21T01:14:15.52 0.6 undecidable manual P 240 142.746 50 -0.08 40
ST.PANI.EHZ. 2021-09-21T01:14:11.55 0.3 undecidable manual P 263 109.7124 50 1.04 47
OX.VARN.HHZ. 2021-09-21T01:14:09.45 0.6 undecidable manual S 247 53.7018 50 0.45 44
MN.TRI.HHZ. 2021-09-21T01:14:08.40 0.6 undecidable manual P 123 94.239 50 0.29 42
IV.FVI.HHZ. 2021-09-21T01:14:07.61 0.3 undecidable manual S 3 46.2204 50 0.62 63
OX.SABO.HNZ. 2021-09-21T01:14:05.01 0.6 undecidable manual P 107 71.373 50 0.41 43
NI.VINO.HHZ. 2021-09-21T01:14:05.70 0.3 undecidable manual S 78 41.2254 50 0.03 73
IV.FREG.EHZ. 2021-09-21T01:14:05.10 0.6 undecidable manual S 241 38.4282 50 0.19 48
OX.ACOM.HHZ. 2021-09-21T01:14:04.82 0.6 undecidable manual P 55 71.373 50 0.23 44
OX.CLUD.HHZ. 2021-09-21T01:14:03.40 0.6 undecidable manual S 18 32.2455 50 0.12 49
OX.FUSE.HHZ. 2021-09-21T01:14:03.40 0.6 undecidable manual S 37 32.3454 50 0.11 49
IT.PNAL.HNE. 2021-09-21T01:14:03.70 0.3 undecidable manual S 269 34.5432 50 -0.19 71
OX.CAE.HHZ. 2021-09-21T01:14:03.20 0.6 undecidable manual S 232 30.5472 50 0.39 47
OX.BOO.HHE. 2021-09-21T01:14:02.60 0.3 undecidable manual S 60 30.9468 50 -0.31 70
NI.PURA.HHE. 2021-09-21T01:14:02.20 0.6 undecidable manual S 359 27.1506 50 0.28 48
OX.VARN.HHZ. 2021-09-21T01:14:01.53 0.1 undecidable manual P 247 53.7018 50 -0.35 89
OX.CIMO.HHZ. 2021-09-21T01:14:01.70 0.3 undecidable manual S 302 27.4503 50 -0.29 71
OX.MPRI.HHZ. 2021-09-21T01:14:00.40 0.6 undecidable manual S 70 19.5693 50 0.53 45
IV.FVI.HHZ. 2021-09-21T01:14:00.64 0.3 undecidable manual P 3 46.2204 50 -0.08 72
IV.FREG.EHZ. 2021-09-21T01:13:59.81 0.3 undecidable manual P 241 38.4282 50 0.29 70
NI.VINO.HHZ. 2021-09-21T01:13:59.41 0.3 undecidable manual P 78 41.2254 50 -0.54 65
OX.CLUD.HHZ. 2021-09-21T01:13:58.40 0.3 undecidable manual P 18 32.2455 50 -0.17 72
OX.FUSE.HHZ. 2021-09-21T01:13:58.15 0.3 undecidable manual P 37 32.3454 50 -0.43 69
IT.PNAL.HNE. 2021-09-21T01:13:58.64 0.6 undecidable manual P 269 34.5432 50 -0.28 47
OX.CAE.HHZ. 2021-09-21T01:13:58.07 0.1 undecidable manual P 232 30.5472 50 -0.23 95
OX.CIMO.HHZ. 2021-09-21T01:13:57.55 0.3 undecidable manual P 302 27.4503 50 -0.28 71
IV.STAL.HHZ. 2021-09-21T01:13:57.40 0.6 undecidable manual S 342 9.2796 139 0.3 72
OX.BOO.HHE. 2021-09-21T01:13:57.93 0.3 undecidable manual P 60 30.9468 50 -0.43 69
OX.MLN.HHZ. 2021-09-21T01:13:57.50 0.3 undecidable manual S 251 10.7781 135 0.05 76
NI.PURA.HHE. 2021-09-21T01:13:57.79 0.6 undecidable manual P 359 27.1506 50 0 50
OX.MPRI.HHZ. 2021-09-21T01:13:56.48 0.3 undecidable manual P 70 19.5693 50 -0.12 75
IV.STAL.HHZ. 2021-09-21T01:13:54.86 0.3 undecidable manual P 342 9.2796 139 -0.14 76
OX.MLN.HHZ. 2021-09-21T01:13:54.99 0.1 undecidable manual P 251 10.7781 135 -0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.STAL.HNN. ML:2.0 0.0012543693499999999 0.3 AML other m 2021-09-21T01:13:57.75
IV.STAL.HHN. ML:1.9 0.0009542603999999999 0.22 AML other m 2021-09-21T01:13:57.77
IV.STAL.HNE. ML:2.0 0.001185 0.66 AML other m 2021-09-21T01:13:58.12
OX.MLN.HHE. ML:1.4 0.0002755 1.58 AML other m 2021-09-21T01:13:58.06
IV.STAL.HHE. ML:1.9 0.0010645 0.76 AML other m 2021-09-21T01:13:58.49
OX.MLN.HHN. ML:1.5 0.00035150000000000003 0.3 AML other m 2021-09-21T01:13:59.43
OX.MPRI.HNE. ML:1.7 0.0004 0.34 AML other m 2021-09-21T01:14:01.54
OX.MPRI.HHE. ML:1.8 0.0005225 0.32 AML other m 2021-09-21T01:14:01.54
OX.CIMO.HHE. ML:1.4 0.000124 0.12 AML other m 2021-09-21T01:14:02.19
OX.CIMO.HNE. ML:1.3 0.00011529999999999998 0.1 AML other m 2021-09-21T01:14:02.19
OX.CIMO.HNN. ML:1.5 0.00017749999999999998 1.14 AML other m 2021-09-21T01:14:02.13
OX.CIMO.HHN. ML:1.5 0.0001805 1.62 AML other m 2021-09-21T01:14:03.05
OX.MPRI.HNN. ML:2.0 0.0008275951 0.34 AML other m 2021-09-21T01:14:04.99
OX.MPRI.HHN. ML:2.2 0.001067 1.64 AML other m 2021-09-21T01:14:05.99
OX.CLUD.HHE. ML:1.1 0.00005895 1.18 AML other m 2021-09-21T01:14:05.24
OX.CLUD.HHN. ML:1.1 0.00006065 0.78 AML other m 2021-09-21T01:14:06.59
OX.CLUD.HNE. ML:1.2 0.0000771 0.72 AML other m 2021-09-21T01:14:06.84
OX.CAE.HHE. ML:2.0 0.00046100000000000004 0.42 AML other m 2021-09-21T01:14:06.74
OX.CAE.HHN. ML:1.6 0.00017999999999999998 0.5 AML other m 2021-09-21T01:14:07.27
OX.CLUD.HNN. ML:1.2 0.0000664 0.72 AML other m 2021-09-21T01:14:09.42
NI.VINO.HHE. ML:1.4 0.0000845 0.54 AML other m 2021-09-21T01:14:09.31
NI.VINO.HHN. ML:1.4 0.00008374999999999999 1.14 AML other m 2021-09-21T01:14:09.90
IV.FVI.HHN. ML:1.3 0.000054449999999999995 0.78 AML other m 2021-09-21T01:14:10.39
IV.FREG.EHE. ML:2.1 0.00047799999999999996 1.3 AML other m 2021-09-21T01:14:10.09
IV.FREG.EHN. ML:1.9 0.0003085 1.26 AML other m 2021-09-21T01:14:11.22
IV.FVI.HHE. ML:1.3 0.000054600000000000006 0.22 AML other m 2021-09-21T01:14:11.71
OX.VARN.HHN. ML:1.8 0.00015099999999999998 1.22 AML other m 2021-09-21T01:14:14.19
OX.VARN.HHE. ML:1.8 0.000154 0.62 AML other m 2021-09-21T01:14:15.60
OX.ACOM.HHE. ML:1.8 0.0001147 1.3 AML other m 2021-09-21T01:14:18.03
OX.ACOM.HHN. ML:1.8 0.0000984 1.38 AML other m 2021-09-21T01:14:19.06
IV.TREG.EHE. ML:2.3 0.00009759999999999999 0.38 AML other m 2021-09-21T01:14:39.67
IV.TREG.EHN. ML:2.2 0.00008395 1.02 AML other m 2021-09-21T01:14:40.87
OX.VARN.HNN. ML:1.8 0.0001483754 0.38 AML other m 2021-09-21T01:14:14.18
OX.VARN.HNE. ML:1.8 0.00014679300000000002 0.52 AML other m 2021-09-21T01:14:16.66
OX.ACOM.HNE. ML:1.8 0.00010425166499999999 0.58 AML other m 2021-09-21T01:14:19.25
IV.TREG.HNE. ML:2.3 0.00011022951 0.4008 AML other m 2021-09-21T01:14:39.67
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