Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 26-01-2021 and time 12:58:49 (UTC) in region Confine Italia Slovenia (SLOVENIA)

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

  • 26-01-2021 12:58:49 (UTC)
  • 26-01-2021 13:58:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.06, 13.67 at 7 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
Stregna UD 10 356 356
San Floriano del Collio GO 11 796 1152
Grimacco UD 13 342 1494
San Leonardo UD 13 1129 2623
Gorizia GO 13 34844 37467
Drenchia UD 14 115 37582
Prepotto UD 15 769 38351
Dolegna del Collio GO 15 370 38721
Savogna UD 15 411 39132
San Pietro al Natisone UD 16 2171 41303
Mossa GO 16 1584 42887
Capriva del Friuli GO 18 1713 44600
San Lorenzo Isontino GO 18 1564 46164
Cormons GO 19 7414 53578
Cividale del Friuli UD 19 11292 64870
Corno di Rosazzo UD 19 3219 68089
Savogna d'Isonzo GO 19 1717 69806
Pulfero UD 19 962 70768
Moraro GO 20 768 71536

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Udine (99169 inhabitants)
46 Km N of Trieste (204420 inhabitants)
79 Km E 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 		Md 1.4
ML 1.4 		2021-01-26
12:58:49		 46.06 13.67 7 2021-01-26
13:08:00		 Sala Sismica INGV-Roma 86598371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-26 12:58:49 ± 0.15
Latitude 46.06 ± 0.01
Longitude 13.67 ± 0.02
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86598371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1259
Semi-minor axis of confidence ellipse (meter) 60
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 1260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 175
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.42718
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
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 86598371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 13:08:00

Md:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 7
Type of magnitude Md
Reference to an origin 86598371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 13:08:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.FVI.HHZ. 2021-01-26T12:59:07.42 3.0 undecidable manual P 0
RF.GEPF.HHZ. 2021-01-26T12:59:06.30 0.3 undecidable manual S 301 0.4272 50 0.26 67
NI.DST2.HNZ. 2021-01-26T12:59:06.16 0.3 undecidable manual S 167 0.4092 50 0.64 61
IV.PTCC.HHZ. 2021-01-26T12:59:05.82 0.3 undecidable manual S 328 0.4119 50 0.22 68
NI.VINO.HHZ. 2021-01-26T12:59:03.26 0.3 undecidable manual S 306 0.3354 100 0.14 70
OX.TRI.HHZ. 2021-01-26T12:59:03.58 3.0 undecidable manual S 0
OX.BAD.HNZ. 2021-01-26T12:59:03.84 0.6 undecidable manual S 301 0.3435 100 0.43 44
NI.DST2.HNZ. 2021-01-26T12:58:58.69 0.3 undecidable manual P 167 0.4092 50 -0.26 68
RF.GEPF.HHZ. 2021-01-26T12:58:58.89 0.1 undecidable manual P 301 0.4272 50 -0.36 88
IV.PTCC.HHZ. 2021-01-26T12:58:58.39 0.3 undecidable manual P 328 0.4119 50 -0.6 62
OX.BAD.HNZ. 2021-01-26T12:58:57.60 0.1 undecidable manual P 301 0.3435 100 -0.13 94
NI.VINO.HHZ. 2021-01-26T12:58:57.24 0.1 undecidable manual P 306 0.3354 100 -0.33 90
OX.DRE.HHZ. 2021-01-26T12:58:55.39 0.3 undecidable manual S 352 0.116 118 0.35 70
OX.SABO.HHZ. 2021-01-26T12:58:53.75 0.3 undecidable manual S 200 0.0746 129 0.06 75
OX.SABO.HHZ. 2021-01-26T12:58:52.06 0.1 undecidable manual P 200 0.0746 129 -0.06 100
OX.DRE.HHZ. 2021-01-26T12:58:52.95 0.1 undecidable manual P 352 0.116 118 0.05 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FVI.HHE. ML:1.4 3.1104905E-5 0.5376 AML other m 2021-01-26T12:59:11.12
IV.FVI.HHN. ML:1.6 5.2076685E-5 2.2592 AML other m 2021-01-26T12:59:13.12
OX.SABO.HHE. ML:1 0.0001859319 0.4032 AML other m 2021-01-26T12:58:55.94
OX.SABO.HHN. ML:1.3 0.00035628075 0.6976 AML other m 2021-01-26T12:58:55.59
OX.SABO.HNE. ML:1.7 0.0008020582 0.4224 AML other m 2021-01-26T12:58:55.95
OX.SABO.HNN. ML:1.9 0.0014126435 0.6592 AML other m 2021-01-26T12:58:54.54
NI.VINO.HHE. ML:0.8 2.3304485E-5 1.664 AML other m 2021-01-26T12:58:57.08
NI.VINO.HHN. ML:0.8 2.55289E-5 0.2432 AML other m 2021-01-26T12:59:04.79
OX.SABO.HHZ. Md:1.1 9 END duration s
OX.DRE.HHZ. Md:1.1 9 END duration s
NI.VINO.HHZ. Md:1.4 10 END duration s
OX.BAD.HNZ. Md:1.4 11 END duration s
NI.DST2.HNZ. Md:1.5 12 END duration s
RF.GEPF.HHZ. Md:1.6 13 END duration s
IV.PTCC.HHZ. Md:1.7 15 END duration s
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