Earthquake with magnitude of ML 3.0 on date 20-04-2021 and time 11:03:10 (UTC) in region Slovenia (SLOVENIA)

A magnitude ML 3.0 earthquake occured in region: Slovenia (SLOVENIA), on

  • 20-04-2021 11:03:10 (UTC)
  • 20-04-2021 13:03:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 46.052, 14.664 at 11 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.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
83 Km NE of Trieste (204420 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard
Shakemap

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and adjourned progressively as more data become available. See http://shakemap.rm.ingv.it/ for additional information.

The red star indicates the epicenter. The red triangles show the stations of the INGV Italian National Seismic Network and the blue triangles those of the Nationa Accelerometric Network of the Dipartimento della Protezione Civile.

Intensity Shakemap

Intensity Shakemap *

This map shows the distribution of the istrumentally derived intensities. To this purpose, it is used a conversion relation between ground acceleration and velocity, and the Mercalli Modificata (MMI - Modified Mercalli Intensity) scale. In general, the Mercalli intensity scale relies on the effects that the ground shaking produces as reported by an observer.
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap *

This map shows This map shows the distribution of peak ground acceleration expressed as per cent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap *

This map shows the distribution of peak ground velocities expressed in cm/s.
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 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
Bulletin
Rev1000
ML 3.0 2021-04-20
11:03:10
46.0522 14.6638 11 2021-07-12
16:55:15
Bollettino Sismico Italiano INGV 91373791
Reviewed
Rev100
ML 3.0 2021-04-20
11:03:11
46.0392 14.6457 10 2021-04-20
11:12:57
Sala Sismica INGV-Roma 89292671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-20 11:03:10 ± 0.11
Latitude 46.0522 ± 0.0072
Longitude 14.6638 ± 0.0065
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91373791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 782
Semi-minor axis of confidence ellipse (meter) 237
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 11
Circular confidence region, given by single value of horizontal uncertainty (meter) 780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 2.58375
Number of stations at which the event was observed 40
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:3

Field Value
Value 3
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 89292671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-20 11:12:57

ML:3

Field Value
Value 3
Uncertainty 0.3
Num. used stations 58
Type of magnitude ML
Reference to an origin 91373791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-22 09:18:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2021-04-20T11:04:56.84 3.0 undecidable manual Sn -4.47 0
IV.MC2.EHZ. 2021-04-20T11:04:43.59 3.0 undecidable manual Sn -0.01 0
IV.SGO.HHZ. 2021-04-20T11:04:41.56 3.0 undecidable manual Pg 8.88 0
IV.ZEN8.EHZ. 2021-04-20T11:04:37.39 3.0 undecidable manual Sn 7.28 0
IV.PTRJ.HNZ. 2021-04-20T11:04:19.62 3.0 undecidable manual Pn -1.79 0
IV.MGAB.HHZ. 2021-04-20T11:04:08.60 3.0 undecidable manual Pn 1.69 0
IV.CRE.HHZ. 2021-04-20T11:04:01.30 3.0 negative manual Pn 1.63 0
IV.FDMO.HHZ. 2021-04-20T11:04:01.71 3.0 negative manual Pn 0.44 0
IV.EL6.EHZ. 2021-04-20T11:03:58.12 3.0 positive manual Pn 0.66 0
IV.PE3.EHZ. 2021-04-20T11:03:56.39 3.0 positive manual Pn 0.69 0
SI.LUSI.HHZ. 2021-04-20T11:03:53.20 0.3 undecidable manual P 269 2.5838 38 0 23
ST.GAGG.HHZ. 2021-04-20T11:03:53.00 0.3 undecidable manual P 272 2.5694 38 0 24
IV.CPGN.EHZ. 2021-04-20T11:03:52.46 3.0 negative manual Pn -3.01 0
OE.WTTA.HHZ. 2021-04-20T11:03:51.98 0.6 undecidable manual P 301 2.4039 38 1.26 12
ST.DOSS.HHZ. 2021-04-20T11:03:50.72 0.3 undecidable manual P 267 2.4201 38 -0.22 27
SI.KOSI.HHZ. 2021-04-20T11:03:49.77 0.6 undecidable manual P 281 2.3077 38 0.39 19
ST.PANI.EHZ. 2021-04-20T11:03:49.44 0.3 undecidable manual P 271 2.3095 38 0.03 31
ST.ZIAN.EHZ. 2021-04-20T11:03:47.73 1.0 undecidable manual P 277 2.1575 38 0.41 11
IV.TEOL.HHZ. 2021-04-20T11:03:47.67 0.6 undecidable manual P 253 2.1979 38 -0.2 22
OX.VARN.HHZ. 2021-04-20T11:03:41.78 0.3 undecidable manual P 269 1.7762 38 -0.27 44
OX.CIMO.HHZ. 2021-04-20T11:03:38.68 0.3 undecidable manual P 280 1.5567 50 -0.25 51
IV.STAL.HHZ. 2021-04-20T11:03:36.33 0.3 undecidable manual P 279 1.3679 50 0.63 50
OX.DRE.HHZ. 2021-04-20T11:03:34.81 0.6 undecidable manual S 280 0.7159 50 0.21 44
OX.CLUD.HHZ. 2021-04-20T11:03:34.69 0.3 undecidable manual P 289 1.2968 50 0.22 57
NI.DST2.HHE. 2021-04-20T11:03:34.53 0.6 undecidable manual S 237 0.7177 50 -0.11 45
MN.TRI.HHZ. 2021-04-20T11:03:34.68 0.3 undecidable manual S 242 0.7141 50 0.15 66
OE.ARSA.BHZ. 2021-04-20T11:03:34.64 0.6 undecidable manual P 26 1.3346 50 -0.49 36
OX.SABO.HHZ. 2021-04-20T11:03:34.96 0.3 undecidable manual S 265 0.7177 50 0.31 64
SL.BOJS.BHZ. 2021-04-20T11:03:33.60 0.6 undecidable manual S 143 0.6835 50 -0.04 46
OX.FUSE.HHZ. 2021-04-20T11:03:33.21 0.3 undecidable manual P 288 1.2051 50 0.3 58
NI.PALA.HHZ. 2021-04-20T11:03:33.25 0.3 undecidable manual P 280 1.2195 50 0.09 60
OX.MPRI.HHZ. 2021-04-20T11:03:32.77 0.3 undecidable manual P 280 1.1754 50 0.36 57
SL.KOGS.BHZ. 2021-04-20T11:03:32.50 0.3 undecidable manual P 70 1.1655 50 0.27 59
RF.GEPF.HHZ. 2021-04-20T11:03:30.72 0.3 undecidable manual P 282 1.0792 50 -0.03 63
CR.ZAG.BHZ. 2021-04-20T11:03:28.60 1.0 undecidable manual P 103 0.947 50 0.11 21
IV.PTCC.HHZ. 2021-04-20T11:03:28.96 0.3 undecidable manual P 292 0.9731 50 0.03 64
OX.ACOM.HHE. 2021-04-20T11:03:28.38 0.3 undecidable manual P 302 0.9362 50 0.07 64
NI.VINO.HHZ. 2021-04-20T11:03:28.57 0.3 undecidable manual P 282 0.9821 50 -0.52 58
OX.PRED.HHE. 2021-04-20T11:03:26.53 0.3 undecidable manual P 298 0.8535 50 -0.37 62
OX.SABO.HHZ. 2021-04-20T11:03:24.40 0.3 undecidable manual P 265 0.7177 50 -0.18 66
MN.TRI.HHZ. 2021-04-20T11:03:24.14 0.3 undecidable manual P 242 0.7141 50 -0.37 64
SL.BOJS.BHZ. 2021-04-20T11:03:24.10 0.1 undecidable manual P 143 0.6835 50 0.11 90
NI.DST2.HHE. 2021-04-20T11:03:24.44 0.3 undecidable manual P 237 0.7177 50 -0.13 67
OX.DRE.HHZ. 2021-04-20T11:03:23.97 0.1 positive manual P 280 0.7159 50 -0.58 80
SL.LJU.BHZ. 2021-04-20T11:03:15.92 0.6 undecidable manual S 265 0.0944 135 -0.07 51
SL.LJU.BHZ. 2021-04-20T11:03:13.97 0.1 undecidable manual P 265 0.0944 135 0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
SL.LJU.BHE. ML:4.5 0.4 0.2 AML other m 2021-04-20T11:03:16.16
SL.LJU.BHN. ML:4.2 0.18 0.4 AML other m 2021-04-20T11:03:16.11
MN.TRI.HHE. ML:2.7 0.000745 0.48 AML other m 2021-04-20T11:03:36.77
OX.SABO.HHN. ML:2.9 0.001076 1.62 AML other m 2021-04-20T11:03:36.02
OX.SABO.HNN. ML:3.5 0.004365 0.34 AML other m 2021-04-20T11:03:37.03
OX.SABO.HHE. ML:3.1 0.0016 0.28 AML other m 2021-04-20T11:03:37.22
OX.SABO.HNE. ML:3.6 0.006135 0.3 AML other m 2021-04-20T11:03:37.28
MN.TRI.HHN. ML:2.5 0.0004296641 0.32 AML other m 2021-04-20T11:03:37.35
SL.BOJS.BHN. ML:3.3 0.00285 0.2 AML other m 2021-04-20T11:03:37.86
SL.BOJS.BHE. ML:3.3 0.003245 1.6 AML other m 2021-04-20T11:03:37.06
CR.ZAG.BHE. ML:0 0.001335 0.44 AML other m 2021-04-20T11:03:45.42
NI.VINO.HHN. ML:2.8 0.0005985 0.58 AML other m 2021-04-20T11:03:45.67
IV.PTCC.HHE. ML:2.8 0.0005545 0.42 AML other m 2021-04-20T11:03:45.46
CR.ZAG.BHN. ML:0 0.001305 0.76 AML other m 2021-04-20T11:03:45.18
IV.PTCC.HHN. ML:2.7 0.0004655 1.6 AML other m 2021-04-20T11:03:46.95
NI.VINO.HHE. ML:2.7 0.000403 0.42 AML other m 2021-04-20T11:03:48.50
RF.GEPF.HHE. ML:2.7 0.0003725 0.5 AML other m 2021-04-20T11:03:48.55
RF.GEPF.HHN. ML:2.9 0.0006215 0.5 AML other m 2021-04-20T11:03:49.64
SL.KOGS.BHE. ML:3.9 0.00561 0.4 AML other m 2021-04-20T11:03:50.27
SL.KOGS.BHN. ML:4 0.006995 0.2 AML other m 2021-04-20T11:03:50.77
OX.MPRI.HHN. ML:3 0.000634 1 AML other m 2021-04-20T11:03:54.79
OX.MPRI.HHE. ML:2.7 0.000355 0.46 AML other m 2021-04-20T11:03:54.44
NI.PALA.HHN. ML:3.1 0.0007795 1.5 AML other m 2021-04-20T11:03:54.79
OE.ARSA.BHE. ML:2.5 0.0001515 1.7 AML other m 2021-04-20T11:03:55.95
OX.CLUD.HNE. ML:2.6 0.000247 0.48 AML other m 2021-04-20T11:03:56.31
OX.CLUD.HHE. ML:2.7 0.0002525 0.48 AML other m 2021-04-20T11:03:56.31
NI.PALA.HHE. ML:3.1 0.0007855 1.74 AML other m 2021-04-20T11:03:57.87
OX.CLUD.HHN. ML:2.6 0.0002015 1.24 AML other m 2021-04-20T11:03:57.13
OE.ARSA.BHN. ML:2.4 0.0001225 0.5 AML other m 2021-04-20T11:03:58.40
OX.CLUD.HNN. ML:2.6 0.0001955 0.68 AML other m 2021-04-20T11:04:00.89
OX.VARN.HHE. ML:3.3 0.000612 0.24 AML other m 2021-04-20T11:04:12.16
OX.VARN.HNE. ML:3.3 0.000611 0.24 AML other m 2021-04-20T11:04:12.16
OX.VARN.HNN. ML:3.2 0.000587 1.16 AML other m 2021-04-20T11:04:12.71
OX.VARN.HHN. ML:3.2 0.0005955 1.16 AML other m 2021-04-20T11:04:12.71
ST.ZIAN.EHN. ML:2.7 0.00010625 0.24 AML other m 2021-04-20T11:04:23.62
ST.ZIAN.EHE. ML:2.8 0.0001285 0.8 AML other m 2021-04-20T11:04:23.73
SI.KOSI.HHN. ML:3 0.0001695 0.44 AML other m 2021-04-20T11:04:27.34
SI.KOSI.HHE. ML:3 0.000191 0.44 AML other m 2021-04-20T11:04:27.40
ST.PANI.EHE. ML:2.8 0.000114 0.3 AML other m 2021-04-20T11:04:28.67
OE.WTTA.HHE. ML:2.6 6.525E-5 0.96 AML other m 2021-04-20T11:04:28.72
ST.PANI.EHN. ML:3.1 0.0002035 0.54 AML other m 2021-04-20T11:04:28.61
IV.TEOL.HHN. ML:3.3 0.0003735 1.02 AML other m 2021-04-20T11:04:29.40
IV.TEOL.HHE. ML:3.4 0.00052 0.6 AML other m 2021-04-20T11:04:31.70
ST.DOSS.HHN. ML:3.1 0.0002185 0.38 AML other m 2021-04-20T11:04:33.67
OE.WTTA.HHN. ML:2.5 5.705E-5 0.66 AML other m 2021-04-20T11:04:34.88
ST.GAGG.HHE. ML:3 0.000123 0.88 AML other m 2021-04-20T11:04:36.88
SI.LUSI.HHN. ML:3.2 0.000215 0.2 AML other m 2021-04-20T11:04:36.63
ST.GAGG.HHN. ML:2.9 0.000107 1.18 AML other m 2021-04-20T11:04:37.83
ST.DOSS.HNN. ML:3.2 0.0002245 0.54 AML other m 2021-04-20T11:04:38.47
ST.DOSS.HHE. ML:3.2 0.000225 0.54 AML other m 2021-04-20T11:04:38.47
ST.DOSS.HNE. ML:3.1 0.000213 0.46 AML other m 2021-04-20T11:04:40.02
SI.LUSI.HHE. ML:3 0.000148 0.48 AML other m 2021-04-20T11:04:43.75
IV.PE3.EHE. ML:3.5 0.0003545 0.44 AML other m 2021-04-20T11:04:52.50
IV.EL6.EHE. ML:3.1 0.0001245 0.56 AML other m 2021-04-20T11:04:56.49
IV.PE3.EHN. ML:3.5 0.00039 0.6 AML other m 2021-04-20T11:04:56.96
IV.EL6.EHN. ML:3.2 0.000159 0.62 AML other m 2021-04-20T11:04:59.71
IV.CRE.HHE. ML:2.8 4.8E-5 0.6 AML other m 2021-04-20T11:05:00.41
IV.FDMO.HHE. ML:2.8 4.775E-5 1.14 AML other m 2021-04-20T11:05:03.08
IV.CRE.HHN. ML:2.9 6.49E-5 0.52 AML other m 2021-04-20T11:05:07.68
IV.FDMO.HHN. ML:2.8 5.365E-5 1.14 AML other m 2021-04-20T11:05:09.06
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download