Earthquake with magnitude of ML 1.2 on date 03-12-2021 and time 01:50:34 (Italy) in region Confine Italia Slovenia (SLOVENIA)

A magnitude ML 1.2 earthquake occured in region: Confine Italia Slovenia (SLOVENIA), on

  • 03-12-2021 00:50:34 (UTC)
  • 03-12-2021 01:50:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.28, 13.708 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
Drenchia UD 13 115 115
Grimacco UD 16 342 457
Savogna UD 19 411 868
Stregna UD 20 356 1224

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NE of Udine (99169 inhabitants)
70 Km N of Trieste (204420 inhabitants)
88 Km E of Pordenone (51229 inhabitants)
Recent and historical seismicity
Seismic hazard
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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
ML 1.2 2021-12-03
46.2795 13.7078 10 2021-12-03
Sala Sismica INGV-Roma 98078011
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-12-03 00:50:34 ± 0.18
Latitude 46.2795 ± 0.0054
Longitude 13.7078 ± 0.0208
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98078011


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1600
Semi-minor axis of confidence ellipse (meter) 379
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 1600
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 202
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) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.11511
Epicentral distance of station farthest from the epicenter (degree) 0.57107
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information


Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 98078011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-03 01:11:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.ACOM.HHZ. 2021-12-03T00:50:46.32 0.3 undecidable manual S 334 0.2995 50 0.14 72
NI.PALA.HHZ. 2021-12-03T00:50:46.09 0.6 positive manual P 267 0.5423 50 0.66 40
IV.PTCC.HHZ. 2021-12-03T00:50:45.28 0.3 undecidable manual S 298 0.2752 50 -0.18 72
MN.TRI.HHZ. 2021-12-03T00:50:45.71 0.1 undecidable manual P 176 0.5711 50 -0.21 90
OX.PRED.HHE. 2021-12-03T00:50:42.62 0.3 undecidable manual S 329 0.1907 115 -0.07 75
OX.ACOM.HHZ. 2021-12-03T00:50:41.37 0.1 undecidable manual P 334 0.2995 50 0.09 98
IV.PTCC.HHZ. 2021-12-03T00:50:40.66 0.3 undecidable manual P 298 0.2752 50 -0.2 72
OX.DRE.HHE. 2021-12-03T00:50:40.08 0.3 undecidable manual S 202 0.1151 128 -0.1 76
OX.PRED.HHE. 2021-12-03T00:50:39.19 0.1 undecidable manual P 329 0.1907 115 -0.07 100
OX.DRE.HHE. 2021-12-03T00:50:38.03 0.1 undecidable manual P 202 0.1151 128 0.22 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTCC.HHN. ML:0.9 4.101501E-5 0.1 AML other m 2021-12-03T00:50:46.52
OX.ACOM.HHE. ML:1.4 0.000107 0.16 AML other m 2021-12-03T00:50:46.64
IV.PTCC.HHE. ML:1.1 5.4419875E-5 0.16 AML other m 2021-12-03T00:50:46.98
OX.ACOM.HHN. ML:1.1 5.307682E-5 0.32 AML other m 2021-12-03T00:50:49.86
OX.ACOM.HNE. ML:1.4 0.00010209992 0.16 AML other m 2021-12-03T00:50:46.64
OX.ACOM.HNN. ML:1.2 5.949336E-5 0.3 AML other m 2021-12-03T00:50:49.38
NI.PALA.HHN. ML:1.5 6.7695385E-5 1.16 AML other m 2021-12-03T00:50:47.04
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download