Earthquake with magnitude of ML 2.7 on date 26-05-2021 and time 19:57:31 (Italy) in region Costa Croata Settentrionale (CROAZIA)

A magnitude ML 2.7 earthquake occured in region: Costa Croata Settentrionale (CROAZIA), on

  • 26-05-2021 17:57:31 (UTC)
  • 26-05-2021 19:57:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.1110, 14.6950 at 10 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
94 Km SE of Trieste (204420 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is 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 shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is 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 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.7 2021-05-26
17:57:31
45.1112 14.6953 10 2021-12-29
11:12:36
Bollettino Sismico Italiano INGV 96440531
Reviewed
Rev100
ML 2.8 2021-05-26
17:57:29
45.0893 14.7437 4 2021-05-26
18:27:30
Sala Sismica INGV-Roma 90516531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-26 17:57:31 ± 0.39
Latitude 45.1112 ± 0.0252
Longitude 14.6953 ± 0.0204
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96440531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2830
Semi-minor axis of confidence ellipse (meter) 1590
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
Circular confidence region, given by single value of horizontal uncertainty (meter) 2830.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 230
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 2.97945
Number of stations at which the event was observed 42
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:2.7

Field Value
Value 2.7
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 96440531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-11 16:28:00

ML:2.8

Field Value
Value 2.8
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 90516531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-26 18:27:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PIPA.HHZ. 2021-05-26T17:59:37.35 3.0 positive manual Pg 23.27 0
IV.RIBO.EHZ.01 2021-05-26T17:59:27.93 3.0 undecidable manual Sn -0.21 0
AC.VLO.HHZ. 2021-05-26T17:59:26.49 3.0 undecidable manual Pn 15.12 0
IV.CSNT.HHZ. 2021-05-26T17:59:19.13 3.0 undecidable manual Sn 3.09 0
IV.SACR.HNZ. 2021-05-26T17:59:08.32 3.0 undecidable manual Pg 22.1 0
IV.MNTT.EHZ. 2021-05-26T17:59:05.03 3.0 undecidable manual Sn -0.24 0
IV.FOSV.EHZ. 2021-05-26T17:59:04.92 3.0 undecidable manual Sn -0.39 0
IV.MPPT.EHZ. 2021-05-26T17:59:03.76 3.0 undecidable manual Sn -6.74 0
IV.INTR.HHZ. 2021-05-26T17:59:03.68 3.0 negative manual Pg 24.93 0
IV.BADI.EHZ. 2021-05-26T17:59:00.28 3.0 undecidable manual Sn -5.13 0
IT.MCLF.HNZ. 2021-05-26T17:58:59.57 3.0 undecidable manual Pg 20.08 0
CR.STON.BHZ. 2021-05-26T17:58:57.60 3.0 negative manual Pg 23.190001 0
IV.CERT.HHZ. 2021-05-26T17:58:55.30 3.0 negative manual Pg 13.69 0
IV.LRP.EHZ. 2021-05-26T17:58:47.99 3.0 positive manual Pn 3.92 0
IV.SEI.HHZ. 2021-05-26T17:58:40.66 3.0 undecidable manual Pg 14.56 0
IV.ARVD.HHZ. 2021-05-26T17:58:37.11 3.0 negative manual Pg 14.31 0
IV.FIR.HHZ. 2021-05-26T17:58:31.11 3.0 undecidable manual Pn 1.81 0
GU.GSCL.HHZ. 2021-05-26T17:58:31.62 3.0 undecidable manual Pn 2.09 0
IV.BADI.EHZ. 2021-05-26T17:58:28.43 3.0 undecidable manual Pn 2.47 0
NI.PALA.HHZ. 2021-05-26T17:58:25.02 0.6 undecidable manual S 313 1.6772 38 1.92 17
IV.PTCC.HHZ. 2021-05-26T17:58:22.66 0.6 undecidable manual S 325 1.5981 38 1.47 24
IV.PE3.EHZ. 2021-05-26T17:58:22.11 3.0 positive manual Pn -0.54 0
NI.VINO.HHZ. 2021-05-26T17:58:20.03 0.6 undecidable manual S 320 1.5127 50 1.33 27
ST.RONC.EHZ. 2021-05-26T17:58:19.92 0.6 undecidable manual P 288 2.9795 38 0.78 12
IV.SALO.HHZ. 2021-05-26T17:58:18.48 0.6 undecidable manual P 281 2.9723 38 -0.56 14
IV.MAGA.HHZ. 2021-05-26T17:58:17.95 0.6 undecidable manual P 285 2.9273 38 -0.48 14
ST.VARA.EHZ. 2021-05-26T17:58:16.08 1.0 undecidable manual P 286 2.7564 38 0.01 8
SI.LUSI.HHZ. 2021-05-26T17:58:15.97 0.6 undecidable manual P 289 2.7591 38 -0.14 15
ST.DOSS.HHZ. 2021-05-26T17:58:13.19 0.3 undecidable manual P 289 2.5739 38 -0.35 26
OX.DRE.HHZ. 2021-05-26T17:58:13.40 0.6 undecidable manual S 326 1.2905 50 1.27 31
IV.CTI.HHZ. 2021-05-26T17:58:10.18 1.0 undecidable manual P 295 2.3265 38 0.05 12
OX.CLUD.HHZ. 2021-05-26T17:58:03.54 0.3 undecidable manual P 317 1.8454 38 0.05 53
SL.KOGS.BHZ. 2021-05-26T17:58:03.84 0.6 undecidable manual P 38 1.7204 38 2.09 14
OX.FUSE.HHZ. 2021-05-26T17:58:02.77 0.3 undecidable manual P 318 1.7582 38 0.49 51
IV.STAL.HHZ. 2021-05-26T17:58:02.59 0.3 undecidable manual P 310 1.7995 38 -0.26 53
NI.POLC.HHZ. 2021-05-26T17:58:02.89 0.3 undecidable manual P 302 1.7870 38 0.21 53
NI.PALA.HHZ. 2021-05-26T17:58:01.86 0.3 undecidable manual P 313 1.6772 38 0.7 50
SL.LJU.BHZ. 2021-05-26T17:58:01.37 0.6 undecidable manual S 353 0.9398 50 -0.36 48
IV.PTCC.HHZ. 2021-05-26T17:58:00.73 0.3 undecidable manual P 325 1.5981 38 0.67 53
OX.MPRI.HHZ. 2021-05-26T17:58:00.72 0.3 undecidable manual P 314 1.6422 38 0.05 60
NI.VINO.HHZ. 2021-05-26T17:57:58.79 0.3 undecidable manual P 320 1.5127 50 0.17 63
MN.TRI.HHZ. 2021-05-26T17:57:58.29 0.6 undecidable manual S 313 0.8858 50 -1.84 23
NI.DST2.HNZ. 2021-05-26T17:57:57.43 0.6 undecidable manual S 311 0.8328 50 -1.14 36
CR.ZAG.BHN. 2021-05-26T17:57:54.41 0.6 undecidable manual P 51 1.1538 50 1.92 21
OX.DRE.HHZ. 2021-05-26T17:57:54.18 0.3 undecidable manual P 326 1.2905 50 -0.65 61
OX.SABO.HHZ. 2021-05-26T17:57:52.40 0.3 undecidable manual P 320 1.1484 50 0 75
SL.LJU.BHZ. 2021-05-26T17:57:49.14 0.6 undecidable manual P 353 0.9398 50 0.32 49
SL.BOJS.BHE. 2021-05-26T17:57:49.90 0.6 undecidable manual S 45 0.5540 50 -0.42 52
MN.TRI.HHZ. 2021-05-26T17:57:47.39 0.3 undecidable manual P 313 0.8858 50 -0.51 71
NI.DST2.HNZ. 2021-05-26T17:57:45.81 0.3 undecidable manual P 311 0.8328 50 -1.19 53
SL.BOJS.BHE. 2021-05-26T17:57:41.67 0.1 undecidable manual P 45 0.5540 50 -0.57 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.TRI.HHN. ML:2.1 0.000135 1.76 AML other m 2021-05-26T17:58:00.04
MN.TRI.HHE. ML:2.2 0.000152922515 0.1536 AML other m 2021-05-26T17:58:00.06
SL.LJU.BHN. ML:3.2 0.001349468 0.192 AML other m 2021-05-26T17:58:04.84
SL.LJU.BHE. ML:3.0 0.0009865 0.6 AML other m 2021-05-26T17:58:06.04
OX.SABO.HNN. ML:3.0 0.0007695871 0.192 AML other m 2021-05-26T17:58:13.44
OX.SABO.HNE. ML:3.2 0.0009493377999999999 0.384 AML other m 2021-05-26T17:58:14.29
OX.SABO.HHE. ML:2.5 0.00022399999999999997 0.4 AML other m 2021-05-26T17:58:14.30
OX.SABO.HHN. ML:2.5 0.00019780455000000002 0.3328 AML other m 2021-05-26T17:58:16.46
ST.VARA.HNE. ML:3.1 0.00015410987 0.2368 AML other m 2021-05-26T17:58:17.61
ST.DOSS.HNN. ML:3.2 0.00019873565 0.5184 AML other m 2021-05-26T17:58:19.45
NI.VINO.HHE. ML:2.4 0.00009325 0.48 AML other m 2021-05-26T17:58:22.90
NI.VINO.HHN. ML:2.5 0.000146 0.78 AML other m 2021-05-26T17:58:24.51
OX.MPRI.HNE. ML:2.8 0.000212 1.5 AML other m 2021-05-26T17:58:25.08
OX.MPRI.HHE. ML:2.9 0.000263 1.52 AML other m 2021-05-26T17:58:25.08
ST.VARA.HNN. ML:3.4 0.0002870191 0.4704 AML other m 2021-05-26T17:58:25.70
IV.PTCC.HHE. ML:2.4 0.00008585000000000001 0.36 AML other m 2021-05-26T17:58:26.27
OX.MPRI.HNN. ML:3.0 0.0003179999999999999 0.44 AML other m 2021-05-26T17:58:27.05
OX.MPRI.HHN. ML:3.0 0.000402 0.42 AML other m 2021-05-26T17:58:27.06
IV.PTCC.HHN. ML:2.3 0.0000745 0.4 AML other m 2021-05-26T17:58:27.09
NI.PALA.HHN. ML:2.9 0.00028265545000000003 0.6656 AML other m 2021-05-26T17:58:27.48
NI.PALA.HHE. ML:2.9 0.0002655 0.44 AML other m 2021-05-26T17:58:29.57
IV.STAL.HHE. ML:2.7 0.0001573417 0.3072 AML other m 2021-05-26T17:58:31.75
IV.STAL.HNN. ML:2.9 0.00021731325000000002 0.2176 AML other m 2021-05-26T17:58:31.88
NI.POLC.HHE. ML:3.0 0.0003035 0.56 AML other m 2021-05-26T17:58:32.67
IV.FIR.HHN. ML:3.4 0.0002672553 1.872 AML other m 2021-05-26T17:58:33.04
IV.SALO.HNE. ML:3.2 0.00016961475 1.1936 AML other m 2021-05-26T17:58:33.74
SL.KOGS.BHE. ML:3.1 0.00044050000000000003 0.3 AML other m 2021-05-26T17:58:33.19
IV.STAL.HNE. ML:2.9 0.0002277131 0.3328 AML other m 2021-05-26T17:58:33.23
IV.STAL.HHN. ML:2.8 0.0001815 0.24 AML other m 2021-05-26T17:58:33.73
SL.KOGS.BHN. ML:3.0 0.00036199999999999996 0.2 AML other m 2021-05-26T17:58:33.84
NI.POLC.HHN. ML:3.1 0.0003635 0.3 AML other m 2021-05-26T17:58:34.69
OX.CLUD.HNE. ML:2.3 0.0000577696 0.656 AML other m 2021-05-26T17:58:34.65
OX.CLUD.HHN. ML:2.3 0.00006235 0.46 AML other m 2021-05-26T17:58:35.73
OX.CLUD.HNN. ML:2.4 0.00006270479500000001 0.448 AML other m 2021-05-26T17:58:35.74
ST.VARA.EHN. ML:3.0 0.0001075864 1.1552 AML other m 2021-05-26T17:58:36.18
IV.VOBA.EHE. ML:0.0 0.000105065305 0.0512 AML other m 2021-05-26T17:58:36.35
OX.CLUD.HHE. ML:2.3 0.000054550000000000005 0.52 AML other m 2021-05-26T17:58:36.61
IV.VOBA.EHN. ML:0.0 0.0001737775 0.0512 AML other m 2021-05-26T17:58:36.42
IV.FIR.HHE. ML:3.4 0.00030845069999999996 0.0896 AML other m 2021-05-26T17:58:36.58
IV.FIR.HNN. ML:3.4 0.0002755317 0.6144 AML other m 2021-05-26T17:58:36.93
IV.FIR.HNE. ML:3.4 0.00028775442 0.32 AML other m 2021-05-26T17:58:36.63
IV.ARVD.HHE. ML:2.1 0.00002813615 0.0768 AML other m 2021-05-26T17:58:37.45
ST.VARA.EHE. ML:3.2 0.00020406495 0.7936 AML other m 2021-05-26T17:58:39.47
IV.VOBA.HNN. ML:0.0 0.00048157159999999996 0.4224 AML other m 2021-05-26T17:58:40.30
IV.SEI.HHE. ML:2.7 0.00007233461499999998 0.1024 AML other m 2021-05-26T17:58:41.92
GU.GSCL.HHE. ML:2.5 0.00002908136 0.192 AML other m 2021-05-26T17:58:42.01
IV.ARVD.HHN. ML:1.9 0.000018922749999999998 1.2576 AML other m 2021-05-26T17:58:43.28
IV.BADI.EHN. ML:2.2 0.000022756940000000002 1.4368 AML other m 2021-05-26T17:58:51.74
IV.BADI.EHE. ML:2.2 0.000025160585 1.68 AML other m 2021-05-26T17:58:52.85
IV.CTI.HHN. ML:2.6 0.000064868635 0.32 AML other m 2021-05-26T17:58:53.32
IV.CTI.HHE. ML:2.6 0.00007674481 1.024 AML other m 2021-05-26T17:58:53.31
ST.DOSS.HHE. ML:2.7 0.00006604999999999999 0.44 AML other m 2021-05-26T17:58:56.95
ST.DOSS.HNE. ML:3.0 0.00015502255 1.1424 AML other m 2021-05-26T17:59:00.82
ST.DOSS.HHN. ML:2.7 0.00006654999999999999 0.5 AML other m 2021-05-26T17:59:00.73
IV.SEI.HHN. ML:2.7 0.00006394047 1.5008 AML other m 2021-05-26T17:59:04.81
ST.RONC.EHE. ML:2.8 0.000054987725000000004 0.7296 AML other m 2021-05-26T17:59:09.56
IV.VOBA.HNE. ML:0.0 0.00023409895 0.2848 AML other m 2021-05-26T17:59:11.91
IV.SALO.HNN. ML:3.1 0.000133336 1.3344 AML other m 2021-05-26T17:59:12.79
IV.MAGA.HHN. ML:2.8 0.00006905 0.54 AML other m 2021-05-26T17:59:12.66
ST.RONC.EHN. ML:2.9 0.00007814825 0.896 AML other m 2021-05-26T17:59:13.48
IV.SALO.HHE. ML:2.7 0.00004796709 1.3184 AML other m 2021-05-26T17:59:15.29
IV.MAGA.HHE. ML:3.0 0.00010855963 1.4752 AML other m 2021-05-26T17:59:18.14
IV.SALO.HHN. ML:2.9 0.00007510233 1.152 AML other m 2021-05-26T17:59:19.78
ST.RONC.HNN. ML:4.3 0.0018037792 1.2096 AML other m 2021-05-26T17:59:24.90
ST.RONC.HNE. ML:4.3 0.0017824884 0.8 AML other m 2021-05-26T17:59:24.90
GU.GSCL.HHN. ML:2.7 0.00005110456 0.72 AML other m 2021-05-26T17:59:43.17
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols 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