Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 16-12-2020 and time 11:05:07 (Italy) in region Confine Italia Slovenia (SLOVENIA)

A magnitude ML 1.4 earthquake occured in region: Confine Italia Slovenia (SLOVENIA), on

  • 16-12-2020 10:05:07 (UTC)
  • 16-12-2020 11:05:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.9880, 13.7500 at 20 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Gorizia GO 11 34844 34844
San Floriano del Collio GO 13 796 35640
Mossa GO 17 1584 37224
Savogna d'Isonzo GO 17 1717 38941
San Lorenzo Isontino GO 18 1564 40505
Capriva del Friuli GO 19 1713 42218
Farra d'Isonzo GO 20 1733 43951

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of Trieste (204420 inhabitants)
41 Km E of Udine (99169 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
Bulletin
Rev1000 		ML 1.4 2020-12-16
10:05:07		 45.9877 13.7502 20 2021-02-26
14:56:11		 Bollettino Sismico Italiano INGV 85647821
Reviewed
Rev100 		ML 1.5 2020-12-16
10:05:07		 45.9917 13.7327 20 2020-12-16
10:15:54		 Sala Sismica INGV-Roma 85466851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-16 10:05:07 ± 0.13
Latitude 45.9877 ± 0.0054
Longitude 13.7502 ± 0.0168
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85647821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1350
Semi-minor axis of confidence ellipse (meter) 270
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 1350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.15293
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 85647821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-23 18:18:26

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 85466851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-16 10:15:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TDS.HHZ. 2020-12-16T10:06:57.46 3.0 undecidable manual Pg 10.96 0
IV.ILOS.HHZ. 2020-12-16T10:06:56.40 3.0 negative manual Pn -3.15 0
IV.CRAC.EHZ. 2020-12-16T10:06:39.41 3.0 positive manual Pn 1.94 0
OT.TAR1.HHZ. 2020-12-16T10:06:39.52 3.0 negative manual Pn 0.37 0
IV.MF5.EHZ. 2020-12-16T10:06:38.00 3.0 undecidable manual Sg 4.7 0
IT.FIE.HGZ. 2020-12-16T10:06:24.37 3.0 undecidable manual Sn -1.54 0
IV.SAMA.EHZ. 2020-12-16T10:06:23.47 3.0 undecidable manual Pg 9.99 0
CR.STON.BHZ. 2020-12-16T10:06:22.14 3.0 undecidable manual Pg 7.38 0
IV.PE3.EHZ. 2020-12-16T10:06:20.18 3.0 undecidable manual Sg 1.46 0
SL.KOGS.BHZ. 2020-12-16T10:06:09.52 3.0 undecidable manual Sg -0.37 0
ST.PANI.EHZ. 2020-12-16T10:06:04.57 3.0 undecidable manual Sg 6.07 0
IV.MNTT.EHZ. 2020-12-16T10:06:00.67 3.0 positive manual Pg 5.46 0
IV.SACS.HHZ. 2020-12-16T10:05:55.36 3.0 undecidable manual Pn -5.56 0
IV.ZONE.HHZ. 2020-12-16T10:05:54.18 3.0 undecidable manual Pg 5.77 0
IV.NDIM.HHZ. 2020-12-16T10:05:45.29 3.0 negative manual Pn 0.5 0
SL.BOJS.BHZ. 2020-12-16T10:05:29.52 0.3 undecidable manual P 114 127.9719 94 0.65 54
OX.ACOM.HHZ. 2020-12-16T10:05:27.66 0.6 undecidable manual S 344 64.7907 100 0.05 46
IV.PTCC.HHE. 2020-12-16T10:05:24.76 0.3 undecidable manual S 327 55.5999 101 -0.45 65
OX.PRED.HHE. 2020-12-16T10:05:24.07 0.6 undecidable manual S 344 52.503 102 -0.31 45
IV.STAL.HHZ. 2020-12-16T10:05:22.85 0.1 undecidable manual P 291 85.4478 97 0.51 80
NI.VINO.HHZ. 2020-12-16T10:05:22.86 0.3 undecidable manual S 309 46.9197 104 -0.09 72
NI.DST2.HNZ. 2020-12-16T10:05:20.05 0.3 undecidable manual S 174 36.6411 109 -0.27 69
OX.ACOM.HHZ. 2020-12-16T10:05:19.44 0.3 undecidable manual P 344 64.7907 100 0.26 66
MN.TRI.HHZ. 2020-12-16T10:05:18.63 0.3 undecidable manual S 178 30.9468 114 -0.26 70
IV.PTCC.HHE. 2020-12-16T10:05:18.24 0.3 undecidable manual P 327 55.5999 101 0.44 65
OX.PRED.HHE. 2020-12-16T10:05:16.85 0.3 undecidable manual P 344 52.503 102 -0.47 65
OX.DRE.HHZ. 2020-12-16T10:05:16.62 0.1 undecidable manual S 339 22.1556 124 -0.2 97
NI.VINO.HHZ. 2020-12-16T10:05:16.34 0.1 undecidable manual P 309 46.9197 104 -0.15 94
NI.DST2.HNZ. 2020-12-16T10:05:15.13 0.3 undecidable manual P 174 36.6411 109 0.16 72
OX.SABO.HHZ. 2020-12-16T10:05:14.64 0.1 undecidable manual S 270 8.9799 152 0.21 100
MN.TRI.HHZ. 2020-12-16T10:05:13.99 0.1 undecidable manual P 178 30.9468 114 -0.16 96
OX.DRE.HHZ. 2020-12-16T10:05:12.88 0.1 positive manual P 339 22.1556 124 -0.08 99
OX.SABO.HHZ. 2020-12-16T10:05:11.76 0.1 positive manual P 270 8.9799 152 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OX.SABO.HNE. ML:2.3 0.001425 0.54 AML other m 2020-12-16T10:05:14.47
OX.SABO.HHE. ML:1.6 0.00026811365 0.1216 AML other m 2020-12-16T10:05:14.74
OX.SABO.HHN. ML:1.6 0.00034399999999999996 0.34 AML other m 2020-12-16T10:05:14.92
OX.SABO.HNN. ML:2.2 0.001295 0.36 AML other m 2020-12-16T10:05:14.93
MN.TRI.HHN. ML:1.1 0.000054399999999999994 0.36 AML other m 2020-12-16T10:05:18.95
MN.TRI.HHE. ML:1.2 0.000069997015 0.1216 AML other m 2020-12-16T10:05:18.85
NI.VINO.HHE. ML:1.0 0.000026926765 0.224 AML other m 2020-12-16T10:05:23.27
NI.VINO.HHN. ML:1.0 0.00002727218 0.3392 AML other m 2020-12-16T10:05:23.59
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