Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 28-04-2023 and time 22:50:01 (Italy) in region 1 km S San Pietro a Maida (CZ)

A magnitude ML 1.1 earthquake occured in region: 1 km S San Pietro a Maida (CZ), on

  • 28-04-2023 20:50:01 (UTC)
  • 28-04-2023 22:50:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.8350, 16.3480 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.

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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
San Pietro a Maida CZ 1 4200 4200
Curinga CZ 3 6779 10979
Jacurso CZ 3 624 11603
Maida CZ 3 4566 16169
Cortale CZ 6 2117 18286
Girifalco CZ 7 5945 24231
Filadelfia VV 7 5384 29615
Francavilla Angitola VV 9 1939 31554
Polia VV 10 1023 32577
Amaroni CZ 10 1855 34432
Vallefiorita CZ 12 1771 36203
Caraffa di Catanzaro CZ 13 1866 38069
Palermiti CZ 13 1213 39282
Olivadi CZ 14 529 39811
Centrache CZ 14 401 40212
Pianopoli CZ 14 2589 42801
Monterosso Calabro VV 14 1729 44530
Cenadi CZ 14 563 45093
Borgia CZ 15 7611 52704
Feroleto Antico CZ 15 2171 54875
San Vito sullo Ionio CZ 15 1811 56686
San Floro CZ 15 716 57402
Amato CZ 16 835 58237
Lamezia Terme CZ 16 70714 128951
Squillace CZ 16 3608 132559
Marcellinara CZ 17 2285 134844
Capistrano VV 17 1042 135886
Miglierina CZ 17 767 136653
Montauro CZ 17 1732 138385
Settingiano CZ 17 3124 141509
Chiaravalle Centrale CZ 18 5759 147268
Gasperina CZ 18 2160 149428
Montepaone CZ 18 5282 154710
Petrizzi CZ 18 1131 155841
Stalettì CZ 18 2433 158274
Argusto CZ 19 522 158796
Tiriolo CZ 19 3870 162666
Platania CZ 19 2172 164838
Pizzo VV 19 9278 174116
Maierato VV 19 2188 176304
San Nicola da Crissa VV 20 1335 177639
Filogaso VV 20 1417 179056

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km S of Lamezia Terme (70714 inhabitants)
23 Km W of Catanzaro (90612 inhabitants)
52 Km S of Cosenza (67546 inhabitants)
73 Km W of Crotone (62178 inhabitants)
99 Km NE of Messina (238439 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 1.1 2023-04-28
20:50:01		 38.8348 16.3478 10 2024-03-01
17:18:11		 Bollettino Sismico Italiano INGV 118415291
Reviewed
Rev100 		ML 0.9 2023-04-28
20:50:01		 38.8403 16.3485 10 2023-04-28
21:08:05		 Sala Sismica INGV-Roma 116853981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-28 20:50:01 ± 0.06
Latitude 38.8348 ± 0.0027
Longitude 16.3478 ± 0.0058
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 118415291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 264
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 86
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.05756
Epicentral distance of station farthest from the epicenter (degree) 0.75723
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 118415291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-06-15 07:13:08

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 116853981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-28 21:08:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELI.HHZ. 2023-04-28T20:50:21.83 0.3 undecidable manual S 12 64.491 50 0.09 69
IV.CAR1.HHZ. 2023-04-28T20:50:17.23 0.3 undecidable manual S 346 47.9187 50 -0.08 71
IV.CET2.HHZ. 2023-04-28T20:50:16.59 0.3 undecidable manual P 336 84.0492 50 0.22 65
IY.SPDC.HHZ. 2023-04-28T20:50:15.28 0.3 undecidable manual S 209 38.9277 50 0.36 68
IV.PLAC.HNZ. 2023-04-28T20:50:15.78 0.3 undecidable manual S 170 43.4232 50 -0.34 68
IV.SERS.HHZ. 2023-04-28T20:50:14.29 0.6 undecidable manual S 53 36.9297 50 -0.08 48
IV.CELI.HHZ. 2023-04-28T20:50:13.65 0.3 undecidable manual P 12 64.491 50 0.3 66
IV.SELL.HHZ. 2023-04-28T20:50:12.51 0.3 undecidable manual S 56 29.2485 50 0.18 72
IV.CAR1.HHZ. 2023-04-28T20:50:10.61 0.3 undecidable manual P 346 47.9187 50 -0.18 70
IV.GIZZ.HHZ. 2023-04-28T20:50:09.49 0.3 undecidable manual S 323 20.1687 117 -0.26 72
IV.PLAC.HNZ. 2023-04-28T20:50:09.88 0.1 undecidable manual P 170 43.4232 50 -0.23 93
IY.SPDC.HHZ. 2023-04-28T20:50:09.84 0.3 undecidable manual P 209 38.9277 50 0.43 67
IY.CHCE.HHZ. 2023-04-28T20:50:08.72 0.6 undecidable manual S 161 17.6712 120 -0.29 48
IV.SERS.HHZ. 2023-04-28T20:50:08.85 0.1 undecidable manual P 53 36.9297 50 -0.25 93
IV.SELL.HHZ. 2023-04-28T20:50:07.85 0.1 undecidable manual P 56 29.2485 50 -0.07 98
IV.GIZZ.HHZ. 2023-04-28T20:50:06.35 0.3 undecidable manual P 323 20.1687 117 -0.08 75
IV.GRI.EHZ. 2023-04-28T20:50:06.31 0.1 undecidable manual S 103 6.3936 148 0.19 100
IY.CHCE.HHZ. 2023-04-28T20:50:05.92 0.1 undecidable manual P 161 17.6712 120 -0.08 100
IV.GRI.EHZ. 2023-04-28T20:50:04.53 0.1 undecidable manual P 103 6.3936 148 0.2 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GRI.EHE. ML:1.2 0.00024249999999999999 0.26 AML other m 2023-04-28T20:50:06.44
IV.GRI.EHN. ML:1.0 0.0001545 0.36 AML other m 2023-04-28T20:50:06.46
IV.GIZZ.HHN. ML:1.3 0.00014800000000000002 0.12 AML other m 2023-04-28T20:50:10.71
IV.GIZZ.HHE. ML:1.2 0.00011999999999999999 0.88 AML other m 2023-04-28T20:50:11.74
IV.SELL.HHE. ML:0.7 0.0000234 0.42 AML other m 2023-04-28T20:50:12.77
IV.SELL.HHN. ML:0.6 0.0000181 1.66 AML other m 2023-04-28T20:50:13.00
IV.CAR1.HHE. ML:1.2 0.00004655 1.22 AML other m 2023-04-28T20:50:18.95
IV.CAR1.HHN. ML:1.3 0.000049449999999999996 0.48 AML other m 2023-04-28T20:50:18.66
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