Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 04-01-2021 and time 13:58:53 (UTC) in region 3 km S Paularo (UD)

A magnitude ML 0.9 earthquake occured in region: 3 km S Paularo (UD), on

  • 04-01-2021 13:58:53 (UTC)
  • 04-01-2021 14:58:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.5, 13.11 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
Paularo UD 3 2623 2623
Ligosullo UD 5 116 2739
Treppo Carnico UD 6 618 3357
Arta Terme UD 7 2171 5528
Paluzza UD 8 2217 7745
Zuglio UD 8 595 8340
Sutrio UD 9 1332 9672
Cercivento UD 10 679 10351
Moggio Udinese UD 12 1714 12065
Tolmezzo UD 13 10440 22505
Ravascletto UD 14 536 23041
Amaro UD 14 823 23864
Resiutta UD 15 309 24173
Pontebba UD 15 1433 25606
Verzegnis UD 15 863 26469
Cavazzo Carnico UD 16 1052 27521
Lauco UD 16 729 28250
Villa Santina UD 17 2233 30483
Dogna UD 17 175 30658
Comeglians UD 18 516 31174
Ovaro UD 19 1922 33096
Chiusaforte UD 19 672 33768
Venzone UD 19 2117 35885
Raveo UD 20 458 36343

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km N of Udine (99169 inhabitants)
70 Km NE of Pordenone (51229 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 0.9 2021-01-04
13:58:53		 46.5 13.11 8 2021-01-04
14:04:50		 Sala Sismica INGV-Roma 86014241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-04 13:58:53 ± 0.08
Latitude 46.50 ± 0.00
Longitude 13.11 ± 0.00
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 86014241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 438
Semi-minor axis of confidence ellipse (meter) 68
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 13
Circular confidence region, given by single value of horizontal uncertainty (meter) 440
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 22
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
Epicentral distance of station farthest from the epicenter (degree) 0.49643
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 86014241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-04 14:04:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.DRE.HHZ. 2021-01-04T13:59:11.14 0.3 undecidable manual S 131 0.4964 50 0.23 68
IV.STAL.HHZ. 2021-01-04T13:59:07.20 0.6 undecidable manual S 229 0.366 50 0.14 48
OX.BAD.HHE. 2021-01-04T13:59:04.11 0.3 undecidable manual S 161 0.2851 104 -0.21 71
NI.PALA.HHZ. 2021-01-04T13:59:04.26 0.6 undecidable manual S 206 0.2878 104 -0.15 48
OX.MPRI.HHZ. 2021-01-04T13:59:04.21 0.3 undecidable manual S 198 0.2752 104 0.27 71
NI.VINO.HHZ. 2021-01-04T13:59:03.68 0.6 undecidable manual S 155 0.2752 104 -0.26 47
OX.DRE.HHZ. 2021-01-04T13:59:03.39 0.1 undecidable manual P 131 0.4964 50 0.04 95
OX.ACOM.HHZ. 2021-01-04T13:59:03.96 0.6 undecidable manual S 81 0.2833 104 -0.27 47
IV.FVI.HHZ. 2021-01-04T13:59:02.46 0.3 undecidable manual S 293 0.2437 106 -0.3 71
OX.GEPF.HHZ. 2021-01-04T13:59:01.51 3.0 undecidable manual S 0
IV.PTCC.HHZ. 2021-01-04T13:59:01.21 0.6 undecidable manual S 119 0.1952 110 0.22 48
IV.STAL.HHZ. 2021-01-04T13:59:00.77 0.1 undecidable manual P 229 0.366 50 -0.35 91
OX.CLUD.HHZ. 2021-01-04T13:59:00.17 0.6 undecidable manual S 253 0.1628 113 0.35 47
OX.BOO.HHZ. 2021-01-04T13:59:00.49 0.6 undecidable manual S 182 0.1835 111 -0.1 50
OX.ACOM.HHZ. 2021-01-04T13:58:59.71 0.1 undecidable manual P 81 0.2833 104 0.22 95
NI.VINO.HHZ. 2021-01-04T13:58:59.30 0.1 undecidable manual P 155 0.2752 104 -0.02 99
OX.BAD.HHE. 2021-01-04T13:58:59.67 0.1 undecidable manual P 161 0.2851 104 0.13 97
NI.PALA.HHZ. 2021-01-04T13:58:59.33 0.1 undecidable manual P 206 0.2878 104 -0.26 94
OX.MPRI.HHZ. 2021-01-04T13:58:59.20 0.1 undecidable manual P 198 0.2752 104 -0.12 97
IV.FVI.HHZ. 2021-01-04T13:58:58.63 0.1 undecidable manual P 293 0.2437 106 -0.01 100
IV.PTCC.HHZ. 2021-01-04T13:58:57.45 0.1 undecidable manual P 119 0.1952 110 -0.17 98
OX.BOO.HHZ. 2021-01-04T13:58:57.55 0.1 undecidable manual P 182 0.1835 111 0.17 98
OX.GEPF.HHZ. 2021-01-04T13:58:57.17 3.0 undecidable manual P 0
OX.CLUD.HHZ. 2021-01-04T13:58:57.37 0.1 undecidable manual P 253 0.1628 113 0.43 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OX.CLUD.HHE. ML:0.7 4.655E-5 0.48 AML other m 2021-01-04T13:59:00.27
OX.CLUD.HHN. ML:0.8 5.575E-5 0.44 AML other m 2021-01-04T13:59:00.27
IV.STAL.HHE. ML:0.9 2.435E-5 0.28 AML other m 2021-01-04T13:59:02.24
IV.PTCC.HHN. ML:0.4 2.13E-5 0.4 AML other m 2021-01-04T13:59:03.02
IV.FVI.HHN. ML:0.9 3.945E-5 1.62 AML other m 2021-01-04T13:59:03.93
IV.PTCC.HHE. ML:0.3 1.71E-5 0.84 AML other m 2021-01-04T13:59:03.70
IV.FVI.HHE. ML:0.9 4.72E-5 0.58 AML other m 2021-01-04T13:59:04.30
NI.VINO.HHN. ML:1.1 6.34E-5 0.16 AML other m 2021-01-04T13:59:04.04
NI.VINO.HHE. ML:1.1 5.56E-5 1.2 AML other m 2021-01-04T13:59:04.14
OX.ACOM.HHE. ML:1.3 9.69E-5 0.28 AML other m 2021-01-04T13:59:05.27
OX.ACOM.HHN. ML:1.3 8.725E-5 0.76 AML other m 2021-01-04T13:59:05.85
IV.STAL.HHN. ML:0.8 1.955E-5 0.22 AML other m 2021-01-04T13:59:07.93
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