Earthquake with magnitude of ML 2.1 on date 23-04-2023 and time 12:31:50 (UTC) in region 3 km N Acireale (CT)

A magnitude ML 2.1 earthquake occured in region: 3 km N Acireale (CT), on

  • 23-04-2023 12:31:50 (UTC)
  • 23-04-2023 14:31:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6400, 15.1580 at 0 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Acireale CT 3 52622 52622
Aci Catena CT 4 29851 82473
Aci Sant'Antonio CT 5 17984 100457
Santa Venerina CT 6 8592 109049
Viagrande CT 6 8563 117612
Aci Bonaccorsi CT 6 3524 121136
Valverde CT 7 7840 128976
Trecastagni CT 7 10910 139886
Zafferana Etnea CT 8 9517 149403
San Giovanni la Punta CT 9 23060 172463
Pedara CT 9 14102 186565
Aci Castello CT 9 18723 205288
San Gregorio di Catania CT 9 11966 217254
Milo CT 10 1087 218341
Tremestieri Etneo CT 10 20589 238930
Giarre CT 10 27659 266589
Riposto CT 11 14838 281427
Sant'Agata li Battiati CT 11 9479 290906
Mascalucia CT 12 31958 322864
Sant'Alfio CT 12 1582 324446
Nicolosi CT 12 7463 331909
Gravina di Catania CT 12 25838 357747
Mascali CT 14 14282 372029
San Pietro Clarenza CT 14 7743 379772
Camporotondo Etneo CT 16 5023 384795
Catania CT 16 314555 699350
Belpasso CT 17 28108 727458
Fiumefreddo di Sicilia CT 18 9623 737081
Misterbianco CT 19 49410 786491
Piedimonte Etneo CT 19 3963 790454
Ragalna CT 19 3924 794378

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km N of Acireale (52622 inhabitants)
16 Km NE of Catania (314555 inhabitants)
66 Km N of Siracusa (122291 inhabitants)
68 Km SW of Reggio di Calabria (183035 inhabitants)
71 Km SW of Messina (238439 inhabitants)
88 Km NE of Ragusa (73313 inhabitants)
94 Km NE of Modica (54633 inhabitants)
94 Km NE of Vittoria (63339 inhabitants)
98 Km E of Caltanissetta (63360 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 2.1 2023-04-23
12:31:50
37.6397 15.1583 0 2024-03-01
17:18:20
Bollettino Sismico Italiano INGV 125160051
Reviewed
Rev200
ML 1.4 2023-04-23
12:31:49
37.674 15.15 4 2024-02-09
11:29:24
Sala Operativa INGV_OE (Catania) 116646661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-23 12:31:50 ± 0.87
Latitude 37.6397 ± 0.0387
Longitude 15.1583 ± 0.0250
Depth (km) 0 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 125160051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4409
Semi-minor axis of confidence ellipse (meter) 2020
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 167
Circular confidence region, given by single value of horizontal uncertainty (meter) 4410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 261
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.56
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33635
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 125160051
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-09 11:29:10

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 116646661
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2023-04-23 12:37:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.IMOL.HNZ. 2023-04-23T12:33:36.73 3.0 negative manual Pg 22.84 0
IV.SMA1.EHZ. 2023-04-23T12:33:33.75 3.0 undecidable manual Sn -5.41 0
HL.VLS.HHZ. 2023-04-23T12:33:26.69 3.0 undecidable manual Sn -5.95 0
IV.NARO.HHZ. 2023-04-23T12:33:21.15 3.0 positive manual Pg 19.969999 0
IV.ARVD.HHZ. 2023-04-23T12:33:00.37 3.0 undecidable manual Pn 1.89 0
IV.CAFE.HHZ. 2023-04-23T12:32:54.78 3.0 undecidable manual Sn 0.26 0
IV.ASSB.HHZ. 2023-04-23T12:32:53.38 3.0 undecidable manual Pn -0.29 0
IV.HPAC.HHZ. 2023-04-23T12:32:28.04 3.0 undecidable manual Sg -0.2 0
IV.LINA.HHZ. 2023-04-23T12:32:26.38 3.0 positive manual Pn 0.29 0
IV.SERS.HHZ. 2023-04-23T12:32:21.35 3.0 undecidable manual S -0.75 0
IV.CET2.HHZ. 2023-04-23T12:32:03.74 3.0 positive manual P 1.51 0
IV.AIO.HHE. 2023-04-23T12:31:59.00 0.3 undecidable manual P 10 37.3293 90 0.76 69
IV.EPIT.HHZ. 2023-04-23T12:31:56.04 0.3 undecidable manual P 335 21.0678 90 1.08 61
IV.ECTS.HHZ. 2023-04-23T12:31:56.46 0.3 undecidable manual P 353 27.0507 90 0.28 81
IV.EPMN.HHN. 2023-04-23T12:31:54.89 0.3 undecidable manual P 5 20.1687 90 0.11 85
IV.ECBD.HHN. 2023-04-23T12:31:54.68 0.3 undecidable manual P 338 16.872 91 0.56 77
IV.ESAL.HHE. 2023-04-23T12:31:53.63 0.3 undecidable manual P 351 12.9759 91 0.28 83
IV.ESPC.HHN. 2023-04-23T12:31:53.18 0.3 undecidable manual P 297 12.876 91 -0.16 85
IV.EPOZ.HNZ. 2023-04-23T12:31:52.43 0.6 undecidable manual S 36 4.4955 92 0.13 58
IV.EVRN.HHZ. 2023-04-23T12:31:52.10 0.6 undecidable manual S 340 5.8941 92 -0.68 50
IV.EMFO.HHE. 2023-04-23T12:31:52.87 0.3 undecidable manual P 331 12.1767 91 -0.33 83
IV.EVRN.HHZ. 2023-04-23T12:31:51.02 0.1 undecidable manual P 340 5.8941 92 -0.9 91
IV.EPOZ.HNZ. 2023-04-23T12:31:50.96 0.1 undecidable manual P 36 4.4955 92 -0.68 100
IV.IVPL.HHZ. 2023-04-23T12:31:41.80 3.0 undecidable manual P -0.16 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPOZ.HNE. ML:0.0 0.0025250535 0.1728 AML other m 2023-04-23T12:31:53.86
IV.EVRN.HHE. ML:2.6 0.006117305500000001 0.16 AML other m 2023-04-23T12:31:53.38
IV.EVRN.HNN. ML:2.6 0.007215 0.2 AML other m 2023-04-23T12:31:53.10
IV.EVRN.HHN. ML:2.7 0.008309999999999998 0.2 AML other m 2023-04-23T12:31:53.10
IV.EVRN.HNE. ML:2.6 0.006229198 0.1536 AML other m 2023-04-23T12:31:53.45
IV.EPIT.HHE. ML:2.0 0.0009080000000000001 0.86 AML other m 2023-04-23T12:32:03.69
IV.EPIT.HHN. ML:2.1 0.0010405 1.04 AML other m 2023-04-23T12:32:08.01
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