Earthquake with magnitude of ML 1.1 on date 04-09-2021 and time 22:17:48 (Italy) in region 5 km W Tramonti di Sopra (PN)

A magnitude ML 1.1 earthquake occured in region: 5 km W Tramonti di Sopra (PN), on

  • 04-09-2021 20:17:48 (UTC)
  • 04-09-2021 22:17:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.309, 12.728 at 10 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
Tramonti di Sopra PN 5 321 321
Tramonti di Sotto PN 6 387 708
Forni di Sotto UD 10 600 1308
Frisanco PN 11 622 1930
Meduno PN 11 1574 3504
Socchieve UD 13 908 4412
Cavasso Nuovo PN 13 1525 5937
Ampezzo UD 13 1006 6943
Fanna PN 14 1583 8526
Preone UD 15 246 8772
Andreis PN 15 259 9031
Maniago PN 15 11698 20729
Enemonzo UD 16 1319 22048
Travesio PN 17 1776 23824
Clauzetto PN 17 380 24204
Claut PN 17 956 25160
Forni di Sopra UD 17 993 26153
Sequals PN 18 2200 28353
Sauris UD 18 416 28769
Raveo UD 18 458 29227
Montereale Valcellina PN 18 4433 33660
Vajont PN 18 1719 35379
Castelnovo del Friuli PN 18 880 36259
Barcis PN 18 256 36515
Arba PN 19 1309 37824
Villa Santina UD 19 2233 40057
Vito d'Asio PN 20 769 40826

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km N of Pordenone (51229 inhabitants)
48 Km NW of Udine (99169 inhabitants)
80 Km NE of Treviso (83731 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 2021-09-04
20:17:48
46.309 12.7282 10 2021-09-04
20:39:55
Sala Sismica INGV-Roma 95045281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-04 20:17:48 ± 0.21
Latitude 46.3090 ± 0.0090
Longitude 12.7282 ± 0.0104
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95045281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 788
Semi-minor axis of confidence ellipse (meter) 649
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 340
Circular confidence region, given by single value of horizontal uncertainty (meter) 790
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
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) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.05036
Epicentral distance of station farthest from the epicenter (degree) 0.28958
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.5
Num. used stations 10
Type of magnitude ML
Reference to an origin 95045281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-04 20:39:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.CIMO.HHZ. 2021-09-04T20:17:55.99 0.3 undecidable manual S 271 0.1961 115 -0.35 69
OX.MPRI.HHZ. 2021-09-04T20:17:55.68 0.6 undecidable manual S 111 0.1916 115 -0.52 44
OX.CLUD.HHZ. 2021-09-04T20:17:55.99 0.6 undecidable manual S 35 0.1817 116 0.14 48
OX.MLN.HHE. 2021-09-04T20:17:55.84 0.6 undecidable manual S 206 0.1772 117 0.14 48
NI.PALA.HHZ. 2021-09-04T20:17:54.49 0.3 undecidable manual S 115 0.1493 121 -0.28 71
IV.FVI.HHZ. 2021-09-04T20:17:53.88 0.1 undecidable manual P 7 0.2896 50 -0.68 82
OX.CIMO.HHZ. 2021-09-04T20:17:53.01 0.1 undecidable manual P 271 0.1961 115 0.17 96
OX.CLUD.HHZ. 2021-09-04T20:17:53.07 0.1 undecidable manual P 35 0.1817 116 0.52 89
OX.MLN.HHE. 2021-09-04T20:17:52.99 0.1 undecidable manual P 206 0.1772 117 0.52 89
NI.PALA.HHZ. 2021-09-04T20:17:52.18 0.1 negative manual P 115 0.1493 121 0.25 95
OX.MPRI.HHZ. 2021-09-04T20:17:52.87 0.1 undecidable manual P 111 0.1916 115 0.11 97
NI.PURA.HHE. 2021-09-04T20:17:51.35 0.1 undecidable manual P 5 0.1169 128 0.02 100
IV.STAL.HHZ. 2021-09-04T20:17:51.28 0.3 undecidable manual S 194 0.0504 151 -0.73 63
IV.STAL.HHZ. 2021-09-04T20:17:50.47 0.1 undecidable manual P 194 0.0504 151 0.13 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.STAL.HHN. ML:1.5 0.0005955 0.16 AML other m 2021-09-04T20:17:51.47
IV.STAL.HNN. ML:1.7 0.000824 0.2 AML other m 2021-09-04T20:17:51.80
IV.STAL.HHE. ML:1.5 0.000511 0.96 AML other m 2021-09-04T20:17:52.18
IV.STAL.HNE. ML:1.4 0.000399 0.2 AML other m 2021-09-04T20:17:52.67
NI.PALA.HHE. ML:1 9.015E-5 0.44 AML other m 2021-09-04T20:17:54.77
NI.PALA.HHN. ML:1.1 0.0001028 0.24 AML other m 2021-09-04T20:17:55.35
OX.MPRI.HHN. ML:0.8 3.895E-5 0.34 AML other m 2021-09-04T20:17:56.93
OX.CIMO.HHE. ML:0.2 9.895E-6 0.4 AML other m 2021-09-04T20:17:56.96
OX.CIMO.HHN. ML:0.2 1.0635E-5 1.14 AML other m 2021-09-04T20:17:56.99
OX.MPRI.HHE. ML:0.5 1.795E-5 0.82 AML other m 2021-09-04T20:17:57.14
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