Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 23-06-2021 and time 16:15:49 (Italy) in region 8 km SE Maletto (CT)

A magnitude ML 2.1 earthquake occured in region: 8 km SE Maletto (CT), on

  • 23-06-2021 14:15:49 (UTC)
  • 23-06-2021 16:15:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7940, 14.9450 at 28 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
Maletto CT 8 3920 3920
Randazzo CT 9 10900 14820
Bronte CT 10 19172 33992
Santa Domenica Vittoria ME 14 980 34972
Maniace CT 14 3765 38737
Moio Alcantara ME 15 717 39454
Roccella Valdemone ME 17 666 40120
Milo CT 17 1087 41207
Malvagna ME 17 733 41940
Adrano CT 18 36122 78062
Zafferana Etnea CT 18 9517 87579
Ragalna CT 18 3924 91503
Biancavilla CT 18 24007 115510
Linguaglossa CT 18 5403 120913
Sant'Alfio CT 18 1582 122495
Castiglione di Sicilia CT 19 3215 125710

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of Acireale (52622 inhabitants)
35 Km NW of Catania (314555 inhabitants)
70 Km SW of Messina (238439 inhabitants)
71 Km SW of Reggio di Calabria (183035 inhabitants)
85 Km E of Caltanissetta (63360 inhabitants)
87 Km NW of Siracusa (122291 inhabitants)
98 Km N of Ragusa (73313 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 2021-06-23
14:15:49		 37.7943 14.9452 29 2021-12-29
11:12:41		 Bollettino Sismico Italiano INGV 97074771
Reviewed
Rev200 		ML 2.0 2021-06-23
14:15:49		 37.785 14.935 24 2021-10-29
22:55:15		 Sala Operativa INGV_OE (Catania) 91774711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-23 14:15:49 ± 0.11
Latitude 37.7943 ± 0.0036
Longitude 14.9452 ± 0.0080
Depth (km) 29 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97074771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 551
Semi-minor axis of confidence ellipse (meter) 422
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 284
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.02698
Epicentral distance of station farthest from the epicenter (degree) 0.86874
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 97074771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-29 22:54:58

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 91774711
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-06-23 16:08:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2021-06-23T14:16:12.25 0.6 undecidable manual S 171 71.5728 106 0.27 42
IV.MPNC.HHZ. 2021-06-23T14:16:07.70 0.3 undecidable manual S 42 52.9026 113 0.42 64
IV.HLNI.HHZ. 2021-06-23T14:16:06.32 0.3 undecidable manual S 187 49.9167 114 -0.23 67
IV.HAVL.HHZ. 2021-06-23T14:16:05.68 0.3 undecidable manual P 170 93.9393 102 -0.26 61
IV.HVIT.HHZ. 2021-06-23T14:16:05.88 0.6 undecidable manual P 203 96.4257 102 -0.45 39
IV.RAFF.HHZ. 2021-06-23T14:16:04.56 0.3 undecidable manual P 219 81.5517 104 0.47 60
IV.HVZN.HHZ. 2021-06-23T14:16:02.62 0.3 undecidable manual P 197 71.2731 106 0.07 66
IV.AIO.HHZ. 2021-06-23T14:16:02.52 0.6 undecidable manual S 52 31.9458 127 0.13 47
IV.NOV.HHZ. 2021-06-23T14:16:02.00 0.6 undecidable manual S 33 30.8469 128 -0.16 47
IV.SSY.HHZ. 2021-06-23T14:16:02.57 0.1 undecidable manual P 171 71.5728 106 -0.02 89
IV.MUCR.HHZ. 2021-06-23T14:16:01.33 0.3 undecidable manual S 347 28.2495 131 -0.3 68
IV.ESAL.HHZ. 2021-06-23T14:16:00.20 0.6 undecidable manual S 105 17.1717 146 0.56 43
IV.HLNI.HHZ. 2021-06-23T14:15:59.30 0.1 undecidable manual P 187 49.9167 114 -0.15 90
IV.EPIT.HHZ. 2021-06-23T14:15:59.27 0.6 undecidable manual S 79 9.9789 159 0.54 43
IV.MPNC.HHZ. 2021-06-23T14:15:59.98 0.3 undecidable manual P 42 52.9026 113 0.1 69
IV.ECTS.HHZ. 2021-06-23T14:15:59.36 0.3 undecidable manual S 58 18.1707 144 -0.44 68
IV.GALF.HHZ. 2021-06-23T14:15:58.03 0.3 undecidable manual P 254 34.4433 124 0.66 61
IV.EMNR.HHZ. 2021-06-23T14:15:58.59 0.6 undecidable manual S 71 7.4814 164 0.07 49
IV.EPZF.HHZ. 2021-06-23T14:15:58.82 0.6 undecidable manual S 293 8.3805 162 0.23 47
IV.MSFR.HHZ. 2021-06-23T14:15:58.61 0.1 undecidable manual P 311 40.7259 119 0.41 87
IV.EMSG.HHZ. 2021-06-23T14:15:57.94 0.6 undecidable manual S 8 2.997 173 -0.34 48
IV.AIO.HHZ. 2021-06-23T14:15:57.02 0.1 positive manual P 52 31.9458 127 -0.04 95
IV.NOV.HHZ. 2021-06-23T14:15:56.86 0.1 undecidable manual P 33 30.8469 128 -0.06 95
IV.MUCR.HHZ. 2021-06-23T14:15:56.46 0.1 undecidable manual P 347 28.2495 131 -0.15 93
IV.ECTS.HHZ. 2021-06-23T14:15:55.24 0.1 undecidable manual P 58 18.1707 144 -0.32 92
IV.ESAL.HHZ. 2021-06-23T14:15:55.63 0.3 undecidable manual P 105 17.1717 146 0.17 71
IV.ESCV.HHN. 2021-06-23T14:15:55.19 0.3 undecidable manual P 245 12.5763 154 0.09 73
IV.ECBD.HHN. 2021-06-23T14:15:55.15 0.3 undecidable manual P 97 12.4764 154 0.05 74
IV.EPIT.HHZ. 2021-06-23T14:15:55.09 0.3 undecidable manual P 79 9.9789 159 0.15 73
IV.EPZF.HHZ. 2021-06-23T14:15:54.64 0.1 undecidable manual P 293 8.3805 162 -0.22 96
IV.EMPL.HHZ. 2021-06-23T14:15:54.93 0.1 undecidable manual P 170 12.9759 153 -0.2 96
IV.EMCN.HHN. 2021-06-23T14:15:54.80 0.3 undecidable manual P 93 7.7811 163 -0.03 75
IV.EMSG.HHZ. 2021-06-23T14:15:54.44 0.1 undecidable manual P 8 2.997 173 -0.24 96
IV.EMNR.HHZ. 2021-06-23T14:15:54.82 0.1 undecidable manual P 71 7.4814 164 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPZF.HHE. ML:2.6 0.00202 0.34 AML other m 2021-06-23T14:15:59.20
IV.EPZF.HHN. ML:2.2 0.0009375 1.1 AML other m 2021-06-23T14:15:59.19
IV.ECTS.HHE. ML:2.3 0.000819 0.2 AML other m 2021-06-23T14:15:59.88
IV.ECTS.HHN. ML:2.2 0.0006979999999999999 1.28 AML other m 2021-06-23T14:16:00.85
IV.MUCR.HHE. ML:2.0 0.00033999999999999997 0.5 AML other m 2021-06-23T14:16:02.29
IV.AIO.HHE. ML:1.8 0.000187 0.28 AML other m 2021-06-23T14:16:02.85
IV.MUCR.HHN. ML:1.7 0.0001735 0.6 AML other m 2021-06-23T14:16:03.13
IV.AIO.HHN. ML:1.7 0.00016499999999999997 0.2 AML other m 2021-06-23T14:16:03.34
IV.GALF.HHE. ML:2.2 0.000458 0.46 AML other m 2021-06-23T14:16:05.84
IV.GALF.HHN. ML:2.2 0.0004485 1.54 AML other m 2021-06-23T14:16:05.13
IV.HLNI.HHE. ML:2.1 0.0002565 0.84 AML other m 2021-06-23T14:16:06.55
IV.HLNI.HHN. ML:2.1 0.0003045 0.1 AML other m 2021-06-23T14:16:06.68
IV.MPNC.HHE. ML:2.0 0.0002295 0.42 AML other m 2021-06-23T14:16:08.73
IV.MPNC.HHN. ML:2.0 0.0002185 0.98 AML other m 2021-06-23T14:16:08.38
IV.HVZN.HHN. ML:2.1 0.00020600000000000002 1.52 AML other m 2021-06-23T14:16:13.08
IV.SSY.HHN. ML:2.8 0.0009410000000000001 0.46 AML other m 2021-06-23T14:16:14.02
IV.SSY.HHE. ML:2.5 0.0005365 0.24 AML other m 2021-06-23T14:16:15.25
IV.HVZN.HHE. ML:2.2 0.00021599999999999996 1.18 AML other m 2021-06-23T14:16:17.99
IV.HAVL.HHE. ML:2.1 0.00011899999999999999 1.06 AML other m 2021-06-23T14:16:18.77
IV.HAVL.HHN. ML:2.2 0.0001585 0.54 AML other m 2021-06-23T14:16:19.78
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
Waveforms Seismic signals in miniseed + resp format Download