Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of mb 4.6 on date 20-08-2023 and time 21:39:29 (UTC) in region Romania

A magnitude mb 4.6 earthquake occured in region: Romania, on

  • 20-08-2023 21:39:29 (UTC)
  • 20-08-2023 23:39:29 (UTC +02:00) Italian time
  • 21-08-2023 00:39:29 (UTC +03:00) local time in the region of the earthquake (Europe/Bucharest)

and geographic coordinates (lat, lon) 45.0970, 23.4130 at 12 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 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 		mb 4.6
Mwp 4.4 		2023-08-20
21:39:29		 45.0967 23.4133 12 2023-08-20
21:50:32		 Sala Sismica INGV-Roma 120339531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-20 21:39:29
Latitude 45.0967
Longitude 23.4133
Depth (km) 12 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 120339531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3605682
Semi-minor axis of confidence ellipse (meter) 410359
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 2921800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50.4022
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 50
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.21837
Epicentral distance of station closest to the epicenter (degree) 1.35085
Epicentral distance of station farthest from the epicenter (degree) 24.48172
Number of stations at which the event was observed 50
Number of stations from which data was used for origin computation 50
Magnitudes information

Mwp:4.4

Field Value
Value 4.4
Uncertainty 0.0
Num. used stations 3
Type of magnitude Mwp
Reference to an origin 120339531
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-08-20 21:50:32

mb:4.6

Field Value
Value 4.6
Uncertainty 0.3
Num. used stations 39
Type of magnitude mb
Reference to an origin 120339531
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-08-20 21:50:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
II.ARTI.BHZ.00 2023-08-20T21:44:48.52 10.0 positive automatic P 50 2717.4687 0.588202 0.888889
GE.VSU.BHZ. 2023-08-20T21:42:40.55 10.0 positive automatic P 7 1500.4536 1.13955 0.909091
II.OBN.BHZ.00 2023-08-20T21:42:32.42 10.0 positive automatic P 35 1448.8608 0.312925 0.930233
RD.ORIF.BHZ. 2023-08-20T21:42:26.72 10.0 positive automatic P 275 1373.3808 1.62049 0.952381
GE.SLIT.BHZ. 2023-08-20T21:42:25.15 10.0 positive automatic P 357 1393.1166 -1.19836 0.909091
FR.SAOF.HHZ.00 2023-08-20T21:42:11.18 10.0 positive automatic P 270 1258.5735 0.305842 0.961538
ML.MSDA.BHZ. 2023-08-20T21:42:09.25 10.0 positive automatic P 219 1267.0206 -2.57666 0.952381
IV.MONC.BHZ. 2023-08-20T21:42:06.54 10.0 positive automatic P 275 1211.7759 1.02592 0.952381
FR.SMPL.HHZ.00 2023-08-20T21:42:03.31 10.0 positive automatic P 259 1181.8281 1.9332 0.985222
GE.STU.BHZ. 2023-08-20T21:41:58.20 10.0 positive automatic P 296 1150.0932 1.20965 0.952381
IV.GIB.BHZ. 2023-08-20T21:41:52.25 10.0 positive automatic P 228 1107.7578 -0.0980805 0.952381
MN.IDI.HHZ. 2023-08-20T21:41:50.34 10.0 positive automatic P 173 1095.8364 -0.487326 0.981595
HL.ARG.HHZ. 2023-08-20T21:41:50.07 10.0 positive automatic P 157 1062.2034 2.60845 0.243902
OE.DAVA.BHZ. 2023-08-20T21:41:49.17 10.0 positive automatic P 288 1066.3659 0.99281 0.930233
MN.VLC.BHZ. 2023-08-20T21:41:43.87 10.0 positive automatic P 269 1033.1436 0.656786 0.952381
IV.SALO.BHZ. 2023-08-20T21:41:40.60 10.0 positive automatic P 278 1005.8487 0.980199 0.930233
GE.ISP.BHZ.00 2023-08-20T21:41:39.65 10.0 positive automatic P 141 997.3572 0.0272718 0.930233
IV.MGAB.BHZ. 2023-08-20T21:41:31.35 10.0 positive automatic P 259 933.3657 -0.0683151 0.930233
KO.BZK.HHZ. 2023-08-20T21:41:29.00 10.0 positive automatic P 109 919.7238 0.0281563 0.956938
GE.APE.BHZ. 2023-08-20T21:41:27.05 10.0 positive automatic P 168 908.3907 -0.562341 0.97561
HL.ITM.HHZ. 2023-08-20T21:41:26.73 10.0 positive automatic P 189 887.5671 1.70408 0.980392
IV.LNSS.BHZ. 2023-08-20T21:41:24.20 10.0 positive automatic P 255 874.4802 0.642972 0.909091
IV.SERS.HHZ. 2023-08-20T21:41:21.07 10.0 positive automatic P 222 870.8838 -2.04935 0.995025
PL.KSP.BHZ. 2023-08-20T21:41:18.31 10.0 positive automatic P 323 827.9268 0.401846 0.97561
MN.CUC.BHZ. 2023-08-20T21:41:18.22 10.0 positive automatic P 230 840.0369 -0.983146 0.97561
OE.KBA.BHZ. 2023-08-20T21:41:16.62 10.0 positive automatic P 289 805.0497 1.35567 0.888889
KO.MDUB.HHZ. 2023-08-20T21:41:16.77 10.0 positive automatic P 126 815.2506 0.551275 0.970874
IV.TRIV.HHZ. 2023-08-20T21:41:15.65 10.0 positive automatic P 246 803.7288 0.946073 0.970874
HL.VLS.HHZ. 2023-08-20T21:41:14.45 10.0 positive automatic P 198 802.8741 -0.114794 0.943396
IV.SGTA.HHZ. 2023-08-20T21:41:13.77 10.0 positive automatic P 239 785.9133 1.217 0.952381
IV.PTCC.BHZ. 2023-08-20T21:41:13.75 10.0 positive automatic P 284 791.9739 0.99649 0.909091
IU.KIEV.BHZ.00 2023-08-20T21:41:08.97 10.0 positive automatic P 33 757.0866 0.111381 0.952381
GE.MATE.BHZ. 2023-08-20T21:41:04.85 10.0 positive automatic P 230 735.4083 -0.826765 0.97561
GE.MORC.BHZ. 2023-08-20T21:40:58.70 10.0 positive automatic P 322 680.8074 -0.79633 0.952381
MN.KEK.BHZ. 2023-08-20T21:40:57.20 10.0 positive automatic P 208 666.9102 -0.518048 0.952381
OE.ARSA.BHZ. 2023-08-20T21:40:55.52 10.0 positive automatic P 294 651.4923 -0.122865 0.888889
AC.SRN.HHZ. 2023-08-20T21:40:54.94 10.0 positive automatic P 207 642.7233 0.255749 0.970874
AC.VLO.HHZ. 2023-08-20T21:40:52.47 10.0 positive automatic P 213 604.5837 2.49505 0.966184
PL.OJC.BHZ. 2023-08-20T21:40:52.61 10.0 positive automatic P 336 629.3811 -1.27648 0.869565
KO.ENEZ.HHZ. 2023-08-20T21:40:43.60 10.0 positive automatic Pg 154 532.689 2.52614 0.943396
HT.LIT.HHZ. 2023-08-20T21:40:42.52 10.0 positive automatic P 188 559.6176 -1.99858 0.980392
PL.KWP.BHZ. 2023-08-20T21:40:38.26 10.0 positive automatic P 354 506.1156 -1.15405 0.97561
MN.BLY.BHZ. 2023-08-20T21:40:35.12 10.0 positive automatic Pg 268 490.9752 -0.418661 0.97561
HL.RDO.HHZ. 2023-08-20T21:40:32.61 10.0 positive automatic P 158 471.0618 -0.504138 1.97955
MN.PDG.BHZ. 2023-08-20T21:40:29.67 10.0 positive automatic Pg 230 445.3431 -0.667286 0.97561
HU.KOVH.BHZ. 2023-08-20T21:40:26.45 10.0 positive automatic Pg 287 427.017 -1.57579 0.909091
GE.PSZ.BHZ. 2023-08-20T21:40:24.55 10.0 positive automatic Pg 321 412.6536 -1.0186 1.95221
MN.DIVS.BHZ. 2023-08-20T21:40:10.25 10.0 positive automatic Pg 249 292.2297 -0.500535 1.95485
HU.LTVH.BHZ. 2023-08-20T21:40:09.36 10.0 positive automatic Pg 336 279.2538 -0.332905 1.23406
MN.BZS.BHZ. 2023-08-20T21:39:52.07 10.0 positive automatic Pg 293 149.9499 -1.62157 2.55186
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