Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 09-02-2021 and time 13:23:56 (UTC) in region 6 km S Resiutta (UD)

A magnitude ML 1.3 earthquake occured in region: 6 km S Resiutta (UD), on

  • 09-02-2021 13:23:56 (UTC)
  • 09-02-2021 14:23:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.34, 13.22 at 8 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.

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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
Resiutta UD 6 309 309
Venzone UD 7 2117 2426
Resia UD 7 1033 3459
Moggio Udinese UD 8 1714 5173
Lusevera UD 9 643 5816
Bordano UD 9 754 6570
Gemona del Friuli UD 10 10964 17534
Chiusaforte UD 10 672 18206
Montenars UD 10 538 18744
Amaro UD 10 823 19567
Artegna UD 12 2885 22452
Magnano in Riviera UD 13 2336 24788
Trasaghis UD 13 2227 27015
Taipana UD 14 636 27651
Dogna UD 14 175 27826
Tarcento UD 14 9012 36838
Cavazzo Carnico UD 14 1052 37890
Osoppo UD 15 2936 40826
Nimis UD 16 2740 43566
Buja UD 17 6563 50129
Treppo Grande UD 18 1708 51837
Tolmezzo UD 18 10440 62277
Attimis UD 18 1805 64082
Verzegnis UD 18 863 64945
Cassacco UD 19 2938 67883
Pontebba UD 19 1433 69316
Tricesimo UD 20 7600 76916

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km N of Udine (99169 inhabitants)
61 Km NE of Pordenone (51229 inhabitants)
88 Km NW of Trieste (204420 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.3 2021-02-09
13:23:56		 46.34 13.22 8 2021-02-09
13:30:03		 Sala Sismica INGV-Roma 86971231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-09 13:23:56 ± 0.09
Latitude 46.34 ± 0.00
Longitude 13.22 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86971231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 399
Semi-minor axis of confidence ellipse (meter) 152
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) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.08993
Epicentral distance of station farthest from the epicenter (degree) 0.36423
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 86971231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-09 13:30:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.MPRI.HHZ. 2021-02-09T13:24:04.87 0.3 undecidable manual S 238 0.1925 111 0.04 74
IV.STAL.HHZ. 2021-02-09T13:24:04.36 0.3 undecidable manual P 257 0.3642 50 -0.5 65
OX.DRE.HHE. 2021-02-09T13:24:04.34 0.3 undecidable manual P 120 0.3363 50 -0.05 72
OX.CLUD.HHZ. 2021-02-09T13:24:03.12 0.3 undecidable manual P 296 0.2626 106 0.18 71
OX.FUSE.HHZ. 2021-02-09T13:24:03.76 0.3 undecidable manual S 295 0.1691 114 -0.26 71
OX.PLRO.HHE. 2021-02-09T13:24:02.17 0.3 undecidable manual P 346 0.2131 110 0.28 70
OX.BOO.HHE. 2021-02-09T13:24:01.19 0.3 undecidable manual S 255 0.0899 130 -0.19 73
RF.GEPF.HHZ. 2021-02-09T13:24:01.29 0.3 undecidable manual S 221 0.0899 130 -0.1 75
OX.FUSE.HHZ. 2021-02-09T13:24:01.09 0.3 undecidable manual P 295 0.1691 114 0.09 74
NI.VINO.HHZ. 2021-02-09T13:24:01.53 0.3 undecidable manual S 158 0.0953 128 -0.03 76
OX.MPRI.HHZ. 2021-02-09T13:24:01.68 0.3 undecidable manual P 238 0.1925 111 0.22 72
IV.PTCC.HHZ. 2021-02-09T13:24:01.77 0.1 undecidable manual S 54 0.1106 124 -0.26 96
OX.BAD.HHE. 2021-02-09T13:24:01.69 0.3 undecidable manual S 173 0.1097 125 -0.3 72
OX.BAD.HHE. 2021-02-09T13:24:00.04 0.3 undecidable manual P 173 0.1097 125 0.21 73
NI.VINO.HHZ. 2021-02-09T13:23:59.89 0.3 undecidable manual P 158 0.0953 128 0.31 72
IV.PTCC.HHZ. 2021-02-09T13:23:59.92 0.1 undecidable manual P 54 0.1106 124 0.07 100
OX.BOO.HHE. 2021-02-09T13:23:59.61 0.3 undecidable manual P 255 0.0899 130 0.13 74
RF.GEPF.HHZ. 2021-02-09T13:23:59.64 0.3 undecidable manual P 221 0.0899 130 0.16 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
RF.GEPF.HHN. ML:1.3 0.0002625 0.24 AML other m 2021-02-09T13:24:01.55
NI.VINO.HHE. ML:1.5 0.0004405 0.16 AML other m 2021-02-09T13:24:01.87
NI.VINO.HHN. ML:1.3 0.000286 0.12 AML other m 2021-02-09T13:24:01.90
IV.PTCC.HHE. ML:1.2 0.000215 1.74 AML other m 2021-02-09T13:24:01.93
IV.PTCC.HHN. ML:1.1 0.0001665 0.14 AML other m 2021-02-09T13:24:02.09
RF.GEPF.HHE. ML:1.1 0.000146456125 0.2368 AML other m 2021-02-09T13:24:02.14
OX.MPRI.HHN. ML:0 6.624878E-5 0.2624 AML other m 2021-02-09T13:24:06.50
IV.STAL.HHE. ML:0 2.52769355E-5 0.2176 AML other m 2021-02-09T13:24:11.92
IV.STAL.HHN. ML:0 2.8113895E-5 0.1792 AML other m 2021-02-09T13:24:11.77
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download