Earthquake with magnitude of ML 1.4 on date 21-09-2021 and time 05:41:16 (UTC) in region 5 km NW Vivaro (PN)

A magnitude ML 1.4 earthquake occured in region: 5 km NW Vivaro (PN), on

  • 21-09-2021 05:41:16 (UTC)
  • 21-09-2021 07:41:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.098, 12.726 at 20 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Vivaro PN 5 1352 1352
Vajont PN 6 1719 3071
Arba PN 7 1309 4380
San Quirino PN 8 4383 8763
Montereale Valcellina PN 8 4433 13196
Maniago PN 8 11698 24894
Fanna PN 10 1583 26477
Sequals PN 11 2200 28677
Aviano PN 11 9106 37783
Cavasso Nuovo PN 11 1525 39308
Cordenons PN 12 18301 57609
San Giorgio della Richinvelda PN 13 4650 62259
Frisanco PN 13 622 62881
Roveredo in Piano PN 13 5967 68848
San Martino al Tagliamento PN 14 1468 70316
Spilimbergo PN 14 12124 82440
Meduno PN 14 1574 84014
Andreis PN 14 259 84273
Zoppola PN 15 8572 92845
Valvasone Arzene PN 15 3988 96833
Travesio PN 16 1776 98609
Budoia PN 16 2569 101178
Barcis PN 16 256 101434
Dignano UD 17 2317 103751
Pordenone PN 17 51229 154980
Porcia PN 18 15293 170273
Castelnovo del Friuli PN 18 880 171153
Fontanafredda PN 18 12205 183358
Casarsa della Delizia PN 18 8540 191898
Polcenigo PN 19 3163 195061
Fiume Veneto PN 19 11697 206758
Pinzano al Tagliamento PN 20 1525 208283

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km NE of Pordenone (51229 inhabitants)
40 Km W of Udine (99169 inhabitants)
61 Km NE of Treviso (83731 inhabitants)
80 Km NE of Venezia (263352 inhabitants)
95 Km NW of Trieste (204420 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
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 05:41:16 ± 0.27
Latitude 46.0985 ± 0.0108
Longitude 12.7258 ± 0.0091
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95686251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1185
Semi-minor axis of confidence ellipse (meter) 247
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 1
Circular confidence region, given by single value of horizontal uncertainty (meter) 1190
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.09173
Epicentral distance of station farthest from the epicenter (degree) 0.37412
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

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 Takeoff_angle Residual Weight
OX.CLUD.HHZ. 2021-09-21T05:41:30.11 0.6 undecidable manual S 17 0.3741 108 -0.42 45
NI.PURA.HHE. 2021-09-21T05:41:29.56 0.1 undecidable manual S 2 0.3274 111 0.34 91
OX.CIMO.HHZ. 2021-09-21T05:41:28.04 0.1 undecidable manual S 318 0.2887 114 -0.11 98
OX.MPRI.HHZ. 2021-09-21T05:41:26.65 0.1 undecidable manual S 52 0.2302 121 0.03 100
OX.CLUD.HHZ. 2021-09-21T05:41:24.60 1.0 undecidable manual P 17 0.3741 108 -0.04 24
OX.FUSE.HHZ. 2021-09-21T05:41:24.37 0.6 negative manual P 31 0.3687 108 -0.18 47
OX.MLN.HHZ. 2021-09-21T05:41:23.67 0.3 undecidable manual S 304 0.0917 149 0 77
NI.PURA.HHE. 2021-09-21T05:41:23.89 0.6 undecidable manual P 2 0.3274 111 0 49
IV.FREG.EHE. 2021-09-21T05:41:23.03 1.0 undecidable manual P 253 0.2995 113 -0.41 23
OX.CIMO.HHZ. 2021-09-21T05:41:23.72 0.3 positive manual P 318 0.2887 114 0.45 67
OX.CAE.HHZ. 2021-09-21T05:41:22.23 1.0 undecidable manual P 246 0.2185 122 0.01 25
OX.MPRI.HHZ. 2021-09-21T05:41:22.64 0.6 negative manual P 52 0.2302 121 0.25 47
OX.MLN.HHZ. 2021-09-21T05:41:21.08 1.0 positive manual P 304 0.0917 149 0.4 24
IV.STAL.HHZ. 2021-09-21T05:41:21.06 0.1 undecidable manual P 356 0.1619 132 -0.38 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OX.MLN.HHE. ML:1.2 0.0001084871 0.0992 AML other m 2021-09-21T05:41:24.58
IV.STAL.HHN. ML:1.8 0.000387 0.28 AML other m 2021-09-21T05:41:24.63
IV.STAL.HNE. ML:1.9 0.000461767 0.192 AML other m 2021-09-21T05:41:24.87
IV.STAL.HHE. ML:1.9 0.00046055795 0.1792 AML other m 2021-09-21T05:41:24.90
OX.MLN.HHN. ML:1.3 0.0001322 0.24 AML other m 2021-09-21T05:41:25.51
IV.STAL.HNN. ML:1.9 0.0004794576 0.24 AML other m 2021-09-21T05:41:23.79
OX.MPRI.HNE. ML:1.4 0.00012068131 0.24 AML other m 2021-09-21T05:41:27.53
OX.MPRI.HHE. ML:1.6 0.00016390415 0.2592 AML other m 2021-09-21T05:41:27.54
OX.CIMO.HHE. ML:1.2 6.185E-5 0.1 AML other m 2021-09-21T05:41:28.27
OX.CIMO.HHN. ML:1.3 7.307426E-5 0.3584 AML other m 2021-09-21T05:41:29.94
OX.MPRI.HNN. ML:1.7 0.000245 0.32 AML other m 2021-09-21T05:41:31.01
OX.MPRI.HHN. ML:1.8 0.000314 0.3 AML other m 2021-09-21T05:41:31.02
OX.CLUD.HHN. ML:0.8 2.215E-5 0.7 AML other m 2021-09-21T05:41:31.26
OX.CLUD.HHE. ML:1 2.965E-5 0.86 AML other m 2021-09-21T05:41:32.55
OX.CAE.HHN. ML:0.7 2.546851055E-5 0.2208 AML other m 2021-09-21T05:41:28.30
OX.CAE.HHE. ML:1.2 7.4312555E-5 0.24 AML other m 2021-09-21T05:41:29.97
OX.CIMO.HNE. ML:1.2 5.840756E-5 0.1024 AML other m 2021-09-21T05:41:28.28
OX.CIMO.HNN. ML:1.3 7.3350045E-5 0.3616 AML other m 2021-09-21T05:41:29.77
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