Earthquake with magnitude of ML 1.0 on date 23-09-2021 and time 05:08:58 (Italy) in region 1 km W Fanna (PN)

A magnitude ML 1.0 earthquake occured in region: 1 km W Fanna (PN), on

  • 23-09-2021 03:08:58 (UTC)
  • 23-09-2021 05:08:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.187, 12.738 at 11 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 1 1583 1583
Cavasso Nuovo PN 3 1525 3108
Maniago PN 3 11698 14806
Frisanco PN 3 622 15428
Meduno PN 5 1574 17002
Vajont PN 5 1719 18721
Arba PN 6 1309 20030
Montereale Valcellina PN 7 4433 24463
Sequals PN 7 2200 26663
Andreis PN 10 259 26922
Travesio PN 10 1776 28698
Tramonti di Sotto PN 12 387 29085
Vivaro PN 13 1352 30437
Castelnovo del Friuli PN 13 880 31317
Barcis PN 14 256 31573
Tramonti di Sopra PN 14 321 31894
Clauzetto PN 15 380 32274
Spilimbergo PN 15 12124 44398
Pinzano al Tagliamento PN 16 1525 45923
San Quirino PN 17 4383 50306
Aviano PN 18 9106 59412
Vito d'Asio PN 18 769 60181
Forgaria nel Friuli UD 18 1786 61967
Ragogna UD 19 2909 64876
San Giorgio della Richinvelda PN 19 4650 69526
Dignano UD 19 2317 71843
Claut PN 19 956 72799

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km N of Pordenone (51229 inhabitants)
41 Km W of Udine (99169 inhabitants)
69 Km NE of Treviso (83731 inhabitants)
89 Km NE of Venezia (263352 inhabitants)
100 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 1.0 2021-09-23
03:08:58
46.1872 12.7382 11 2021-09-23
03:12:46
Sala Sismica INGV-Roma 95766721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-23 03:08:58 ± 0.13
Latitude 46.1872 ± 0.0108
Longitude 12.7382 ± 0.0065
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95766721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1198
Semi-minor axis of confidence ellipse (meter) 497
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 175
Circular confidence region, given by single value of horizontal uncertainty (meter) 1200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 173
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.23742
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 95766721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-23 03:12:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.CIMO.HHZ. 2021-09-23T03:09:08.11 0.3 undecidable manual S 302 0.2374 50 0.16 71
OX.MPRI.HHZ. 2021-09-23T03:09:06.68 0.6 undecidable manual S 73 0.1808 50 0.42 45
NI.PALA.HHZ. 2021-09-23T03:09:05.20 0.3 undecidable manual S 66 0.1412 124 0.24 71
IV.STAL.HHZ. 2021-09-23T03:09:03.03 0.6 undecidable manual S 345 0.0755 142 -0.07 50
OX.MLN.HHZ. 2021-09-23T03:09:03.77 0.6 undecidable manual S 246 0.0926 136 0.23 48
OX.CIMO.HHZ. 2021-09-23T03:09:03.75 0.1 undecidable manual P 302 0.2374 50 -0.16 95
OX.MPRI.HHZ. 2021-09-23T03:09:02.75 0.1 undecidable manual P 73 0.1808 50 -0.18 95
NI.PALA.HHZ. 2021-09-23T03:09:01.80 0.3 undecidable manual P 66 0.1412 124 -0.38 69
IV.STAL.HHZ. 2021-09-23T03:09:01.14 0.1 negative manual P 345 0.0755 142 0.04 100
OX.MLN.HHZ. 2021-09-23T03:09:01.35 0.6 negative manual P 246 0.0926 136 -0.01 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.STAL.HHN. ML:1.2 0.000216 0.18 AML other m 2021-09-23T03:09:04.57
IV.STAL.HHE. ML:1.2 0.000201 1.58 AML other m 2021-09-23T03:09:04.19
OX.MLN.HHN. ML:0.7 5.635E-5 0.46 AML other m 2021-09-23T03:09:06.38
NI.PALA.HHE. ML:1.2 0.000154 0.94 AML other m 2021-09-23T03:09:06.67
OX.MLN.HHE. ML:0.7 5.47E-5 0.96 AML other m 2021-09-23T03:09:06.28
NI.PALA.HHN. ML:1.2 0.000139 0.68 AML other m 2021-09-23T03:09:06.39
OX.CIMO.HHN. ML:0.8 3.46E-5 0.58 AML other m 2021-09-23T03:09:08.34
OX.CIMO.HHE. ML:0.7 2.8E-5 1.04 AML other m 2021-09-23T03:09:08.34
OX.MPRI.HHE. ML:0.9 5.865E-5 0.66 AML other m 2021-09-23T03:09:09.35
OX.MPRI.HHN. ML:1.3 0.0001379 1.54 AML other m 2021-09-23T03:09:11.82
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