Earthquake with magnitude of ML 1.1 on date 21-09-2021 and time 11:30:33 (UTC) in region 2 km SW Fanna (PN)

A magnitude ML 1.1 earthquake occured in region: 2 km SW Fanna (PN), on

  • 21-09-2021 11:30:33 (UTC)
  • 21-09-2021 13:30:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.178, 12.738 at 13 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
Fanna PN 2 1583 1583
Maniago PN 2 11698 13281
Cavasso Nuovo PN 3 1525 14806
Frisanco PN 4 622 15428
Vajont PN 5 1719 17147
Arba PN 5 1309 18456
Meduno PN 6 1574 20030
Montereale Valcellina PN 7 4433 24463
Sequals PN 7 2200 26663
Andreis PN 10 259 26922
Travesio PN 11 1776 28698
Vivaro PN 12 1352 30050
Tramonti di Sotto PN 13 387 30437
Castelnovo del Friuli PN 13 880 31317
Barcis PN 14 256 31573
Spilimbergo PN 15 12124 43697
Clauzetto PN 15 380 44077
Tramonti di Sopra PN 15 321 44398
Pinzano al Tagliamento PN 16 1525 45923
San Quirino PN 16 4383 50306
Aviano PN 17 9106 59412
San Giorgio della Richinvelda PN 18 4650 64062
Vito d'Asio PN 18 769 64831
Dignano UD 18 2317 67148
Forgaria nel Friuli UD 19 1786 68934
Ragogna UD 19 2909 71843
Claut PN 20 956 72799
San Martino al Tagliamento PN 20 1468 74267

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of Pordenone (51229 inhabitants)
40 Km W of Udine (99169 inhabitants)
68 Km NE of Treviso (83731 inhabitants)
88 Km NE of Venezia (263352 inhabitants)
99 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 1.1 2021-09-21
11:30:33
46.1778 12.7382 13 2021-09-21
11:43:36
Sala Sismica INGV-Roma 95696381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 11:30:33 ± 0.11
Latitude 46.1778 ± 0.0090
Longitude 12.7382 ± 0.0104
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95696381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1122
Semi-minor axis of confidence ellipse (meter) 547
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 322
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 161
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) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.08454
Epicentral distance of station farthest from the epicenter (degree) 0.29588
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 95696381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-21 11:43:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.CLUD.HHZ. 2021-09-21T11:30:45.31 0.3 undecidable manual S 19 0.2959 95 0.43 68
OX.CAE.HHE. 2021-09-21T11:30:44.53 0.6 undecidable manual S 231 0.268 96 0.47 45
OX.CIMO.HHZ. 2021-09-21T11:30:43.34 0.1 undecidable manual S 303 0.2428 98 0.02 100
OX.MPRI.HHZ. 2021-09-21T11:30:41.93 0.1 undecidable manual S 70 0.1835 103 0.33 95
NI.PALA.HHZ. 2021-09-21T11:30:40.46 0.3 undecidable manual S 62 0.1448 111 -0.04 76
OX.CLUD.HHZ. 2021-09-21T11:30:40.11 1.0 negative manual P 19 0.2959 95 -0.02 25
OX.MLN.HHZ. 2021-09-21T11:30:39.18 0.3 undecidable manual S 252 0.0899 131 0.08 77
OX.CIMO.HHZ. 2021-09-21T11:30:39.09 0.6 positive manual P 303 0.2428 98 -0.14 49
OX.CAE.HHE. 2021-09-21T11:30:39.56 0.6 undecidable manual P 231 0.268 96 -0.1 49
IV.STAL.HHZ. 2021-09-21T11:30:39.04 0.3 undecidable manual S 347 0.0845 134 0.06 77
OX.MPRI.HHZ. 2021-09-21T11:30:38.15 0.1 positive manual P 70 0.1835 103 -0.09 100
NI.PALA.HHZ. 2021-09-21T11:30:37.30 0.1 positive manual P 62 0.1448 111 -0.3 96
IV.STAL.HHZ. 2021-09-21T11:30:36.44 0.1 negative manual P 347 0.0845 134 -0.28 97
OX.MLN.HHZ. 2021-09-21T11:30:36.65 0.6 negative manual P 252 0.0899 131 -0.14 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.STAL.HNN. ML:1.4 0.0002471735 0.2496 AML other m 2021-09-21T11:30:39.16
IV.STAL.HHN. ML:1.2 0.000174 0.22 AML other m 2021-09-21T11:30:39.20
IV.STAL.HNE. ML:1.3 0.0002045 0.26 AML other m 2021-09-21T11:30:39.76
OX.MLN.HHE. ML:0.6 4.5029645E-5 0.1152 AML other m 2021-09-21T11:30:39.95
IV.STAL.HHE. ML:1.2 0.0001765251 0.1792 AML other m 2021-09-21T11:30:39.91
OX.MLN.HHN. ML:0.6 4.7266445E-5 0.2432 AML other m 2021-09-21T11:30:40.88
NI.PALA.HHN. ML:1.1 0.00010842845 0.3008 AML other m 2021-09-21T11:30:42.60
NI.PALA.HHE. ML:1.2 0.0001255 0.22 AML other m 2021-09-21T11:30:41.41
OX.MPRI.HHE. ML:1 6.41E-5 0.28 AML other m 2021-09-21T11:30:42.89
OX.CIMO.HHE. ML:0.7 2.555E-5 0.1 AML other m 2021-09-21T11:30:43.64
OX.CIMO.HHN. ML:0.8 3.245E-5 0.84 AML other m 2021-09-21T11:30:43.64
OX.MPRI.HHN. ML:1.3 0.0001305 0.32 AML other m 2021-09-21T11:30:46.35
OX.MPRI.HNE. ML:1 6.6353445E-5 0.5184 AML other m 2021-09-21T11:30:42.88
OX.MPRI.HNN. ML:1.2 0.000105886445 0.3264 AML other m 2021-09-21T11:30:46.50
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