Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 23-09-2020 and time 11:21:25 (UTC) in region Confine Italia Slovenia (SLOVENIA)

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

  • 23-09-2020 11:21:25 (UTC)
  • 23-09-2020 13:21:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.0450, 13.7400 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
San Floriano del Collio GO 14 796 796
Gorizia GO 15 34844 35640
Stregna UD 16 356 35996
Grimacco UD 17 342 36338
Drenchia UD 17 115 36453
San Leonardo UD 19 1129 37582
Mossa GO 19 1584 39166

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Udine (99169 inhabitants)
44 Km N of Trieste (204420 inhabitants)
84 Km E of Pordenone (51229 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.2 2020-09-23
11:21:25		 46.0452 13.7402 8 2020-09-23
11:29:09		 Sala Sismica INGV-Roma 83156381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-23 11:21:25 ± 0.18
Latitude 46.0452 ± 0.0054
Longitude 13.7402 ± 0.0168
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 83156381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1310
Semi-minor axis of confidence ellipse (meter) 111
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 1310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.55668
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 83156381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-23 11:29:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.MPRI.HHZ. 2020-09-23T11:21:45.26 0.6 undecidable manual S 291 61.7937 50 0.54 41
OX.ACOM.HHZ. 2020-09-23T11:21:43.84 0.6 undecidable manual S 343 58.3971 50 0.01 47
OX.BAD.HHE. 2020-09-23T11:21:39.39 0.1 undecidable manual S 299 43.5231 50 -0.46 87
MN.TRI.HHE. 2020-09-23T11:21:38.18 0.1 undecidable manual S 177 37.3293 50 -0.02 97
OX.MPRI.HHZ. 2020-09-23T11:21:36.66 0.6 positive manual P 291 61.7937 50 0.22 44
OX.ACOM.HHZ. 2020-09-23T11:21:36.75 1.0 positive manual P 343 58.3971 50 0.83 18
IV.PTCC.HHE. 2020-09-23T11:21:34.71 0.3 undecidable manual P 324 49.9167 50 0.1 70
OX.DST2.HHZ. 2020-09-23T11:21:34.45 3.0 undecidable manual P 0
OX.BAD.HHE. 2020-09-23T11:21:33.82 0.3 undecidable manual P 299 43.5231 50 0.19 69
MN.TRI.HHE. 2020-09-23T11:21:32.14 0.6 undecidable manual P 177 37.3293 50 -0.53 43
OX.DRE.HHZ. 2020-09-23T11:21:31.04 0.3 undecidable manual S 333 15.9729 117 -0.3 71
OX.SABO.HHZ. 2020-09-23T11:21:29.70 0.3 undecidable manual S 232 10.3785 128 0.01 76
OX.DRE.HHZ. 2020-09-23T11:21:28.77 0.1 positive manual P 333 15.9729 117 0.06 100
OX.SABO.HHZ. 2020-09-23T11:21:27.86 0.1 positive manual P 232 10.3785 128 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OX.SABO.HHE. ML:1.1 0.0001621223 0.3392 AML other m 2020-09-23T11:21:31.39
OX.SABO.HHN. ML:1.3 0.00028562920000000004 0.2816 AML other m 2020-09-23T11:21:30.60
OX.SABO.HNE. ML:1.6 0.0005862306500000001 0.3584 AML other m 2020-09-23T11:21:31.39
OX.SABO.HNN. ML:1.9 0.00111484985 0.2624 AML other m 2020-09-23T11:21:30.60
OX.MPRI.HHN. ML:1.2 0.00002836591 0.64 AML other m 2020-09-23T11:21:52.94
OX.MPRI.HNE. ML:1.2 0.000037095885 0.8 AML other m 2020-09-23T11:21:50.37
OX.ACOM.HHE. ML:0.8 0.000016603740999999997 0.1792 AML other m 2020-09-23T11:21:48.12
OX.ACOM.HHN. ML:0.8 0.000012884270999999999 0.7808 AML other m 2020-09-23T11:21:42.01
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