Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 15-08-2021 and time 11:04:44 (Italy) in region Costa Catanese (Catania)

A magnitude ML 1.4 earthquake occured in region: Costa Catanese (Catania), on

  • 15-08-2021 09:04:44 (UTC)
  • 15-08-2021 11:04:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7620, 15.5970 at 39 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km S of Reggio di Calabria (183035 inhabitants)
41 Km E of Acireale (52622 inhabitants)
48 Km S of Messina (238439 inhabitants)
53 Km NE of Catania (314555 inhabitants)
82 Km NE of Siracusa (122291 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 1.4 2021-08-15
09:04:44		 37.7617 15.5973 39 2021-12-29
11:12:30		 Bollettino Sismico Italiano INGV 95503661
Reviewed
Rev100 		ML 1.5 2021-08-15
09:04:44		 37.7767 15.5813 43 2021-08-15
09:14:25		 Sala Sismica INGV-Roma 94187911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-15 09:04:44 ± 0.09
Latitude 37.7617 ± 0.0036
Longitude 15.5973 ± 0.0080
Depth (km) 39 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95503661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 727
Semi-minor axis of confidence ellipse (meter) 224
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.25451
Epicentral distance of station farthest from the epicenter (degree) 0.88583
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 95503661
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-27 14:59:33

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 94187911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-15 09:14:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.JOPP.HHZ. 2021-08-15T09:05:12.21 0.6 undecidable manual S 15 97.0251 91 -0.15 45
IV.HAVL.HHZ. 2021-08-15T09:05:12.71 0.6 undecidable manual S 205 98.3238 91 0.07 45
IV.HLNI.HHZ. 2021-08-15T09:05:08.42 0.6 undecidable manual S 235 78.5658 91 0.05 47
IV.SSY.HHZ. 2021-08-15T09:05:08.88 0.3 undecidable manual S 215 81.3519 91 -0.09 69
IV.HSRS.HNN. 2021-08-15T09:05:08.79 0.6 undecidable manual S 204 81.252 91 -0.16 46
IV.HCRL.HHZ. 2021-08-15T09:05:06.91 0.3 undecidable manual S 223 72.7716 92 -0.21 69
IV.HAGA.HHZ. 2021-08-15T09:05:05.26 0.6 undecidable manual S 216 65.6898 92 -0.34 45
IV.SOI.EHZ. 2021-08-15T09:05:03.01 0.6 undecidable manual S 49 52.8027 96 0.17 48
IV.MSRU.HHZ. 2021-08-15T09:05:03.49 0.6 undecidable manual S 352 56.1993 94 -0.08 49
IV.MPNC.HHZ. 2021-08-15T09:05:01.89 1.0 undecidable manual S 333 47.7189 101 0.14 24
IV.NOV.HHZ. 2021-08-15T09:05:01.85 0.6 undecidable manual S 306 50.0166 98 -0.38 47
IV.AIO.HHZ. 2021-08-15T09:05:00.00 0.3 undecidable manual S 306 39.4272 113 -0.05 77
IV.JOPP.HHZ. 2021-08-15T09:05:00.73 0.6 undecidable manual P 15 97.0251 91 0.27 43
IV.HAVL.HHZ. 2021-08-15T09:05:00.78 0.6 positive manual P 205 98.3238 91 0.16 45
IV.MTTG.HHE. 2021-08-15T09:04:58.12 0.6 undecidable manual S 18 28.2495 130 0.14 51
IV.SSY.HHZ. 2021-08-15T09:04:58.55 0.6 negative manual P 215 81.3519 91 0.05 47
IV.HSRS.HNN. 2021-08-15T09:04:58.84 0.6 undecidable manual P 204 81.252 91 0.35 44
IV.HLNI.HHZ. 2021-08-15T09:04:58.10 0.1 positive manual P 235 78.5658 91 -0.06 94
IV.HCRL.HHZ. 2021-08-15T09:04:57.61 0.1 positive manual P 223 72.7716 92 0.18 93
IV.EMSG.HHZ. 2021-08-15T09:04:56.40 0.3 undecidable manual P 277 57.0984 94 0.9 57
IV.HAGA.HHZ. 2021-08-15T09:04:56.50 0.6 undecidable manual P 216 65.6898 92 -0.05 48
IV.MSRU.HHZ. 2021-08-15T09:04:55.08 0.6 undecidable manual P 352 56.1993 94 -0.3 47
IV.NOV.HHZ. 2021-08-15T09:04:54.57 0.1 undecidable manual P 306 50.0166 98 -0.04 100
IV.SOI.EHZ. 2021-08-15T09:04:54.73 0.6 undecidable manual P 49 52.8027 96 -0.23 48
IV.MPNC.HHZ. 2021-08-15T09:04:54.28 1.0 undecidable manual P 333 47.7189 101 -0.05 25
IV.AIO.HHZ. 2021-08-15T09:04:53.26 0.6 undecidable manual P 306 39.4272 113 -0.09 50
IV.MTTG.HHE. 2021-08-15T09:04:52.03 0.3 undecidable manual P 18 28.2495 130 -0.13 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTTG.HHN. ML:1.2 0.00003914442 0.3776 AML other m 2021-08-15T09:04:58.55
IV.MTTG.HHE. ML:1.0 0.000023233375000000002 0.576 AML other m 2021-08-15T09:04:58.40
IV.MPNC.HHN. ML:1.3 0.00003988181 0.9344 AML other m 2021-08-15T09:05:02.41
IV.SOI.EHE. ML:0.7 0.0000123469215 1.5552 AML other m 2021-08-15T09:05:02.69
IV.MSRU.HHE. ML:1.6 0.000068049965 0.9216 AML other m 2021-08-15T09:05:03.88
IV.SOI.EHN. ML:1.0 0.000019038095 1.4176 AML other m 2021-08-15T09:05:04.05
IV.MPNC.HHE. ML:1.3 0.00003925 1.42 AML other m 2021-08-15T09:05:04.06
IV.MSRU.HHN. ML:1.4 0.000046807725000000004 0.4416 AML other m 2021-08-15T09:05:05.40
IV.HCRL.HHE. ML:1.5 0.00004180515 0.1408 AML other m 2021-08-15T09:05:07.55
IV.HCRL.HHN. ML:1.5 0.000044664885 0.0768 AML other m 2021-08-15T09:05:07.82
IV.HLNI.HHE. ML:1.5 0.00003718112 0.1216 AML other m 2021-08-15T09:05:08.87
IV.HLNI.HHN. ML:1.4 0.0000291 1.88 AML other m 2021-08-15T09:05:08.99
IV.HAVL.HHE. ML:1.8 0.00006653089000000001 0.1792 AML other m 2021-08-15T09:05:13.21
IV.HAVL.HHN. ML:1.9 0.000075035635 0.2176 AML other m 2021-08-15T09:05:13.47
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