Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 26-08-2021 and time 07:38:05 (UTC) in region Costa Catanese (Catania)

A magnitude ML 1.8 earthquake occured in region: Costa Catanese (Catania), on

  • 26-08-2021 07:38:05 (UTC)
  • 26-08-2021 09:38:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.5640, 15.3220 at 27 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
Acireale CT 15 52622 52622
Aci Castello CT 16 18723 71345
Aci Catena CT 16 29851 101196
Valverde CT 17 7840 109036
Aci Sant'Antonio CT 18 17984 127020
San Gregorio di Catania CT 19 11966 138986
Aci Bonaccorsi CT 19 3524 142510

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Acireale (52622 inhabitants)
22 Km E of Catania (314555 inhabitants)
56 Km N of Siracusa (122291 inhabitants)
67 Km SW of Reggio di Calabria (183035 inhabitants)
73 Km S of Messina (238439 inhabitants)
88 Km NE of Ragusa (73313 inhabitants)
93 Km NE of Modica (54633 inhabitants)
97 Km NE of Vittoria (63339 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 1.8 2021-08-26
07:38:05		 37.5638 15.3222 27 2021-12-29
11:12:52		 Bollettino Sismico Italiano INGV 97787521
Reviewed
Rev100 		ML 1.8 2021-08-26
07:38:05		 37.563 15.323 27 2021-08-26
07:52:47		 Sala Sismica INGV-Roma 94652931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-26 07:38:05 ± 0.1
Latitude 37.5638 ± 0.0027
Longitude 15.3222 ± 0.0079
Depth (km) 27 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97787521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 680
Semi-minor axis of confidence ellipse (meter) 168
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 105
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.15109
Epicentral distance of station farthest from the epicenter (degree) 0.83457
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 97787521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-25 16:58:34

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 94652931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-26 07:52:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HMDC.HHZ. 2021-08-26T07:38:30.57 0.6 undecidable manual S 216 82.251 103 0.41 43
IV.HVZN.HHZ. 2021-08-26T07:38:27.20 0.6 undecidable manual S 232 68.4759 106 0.6 41
IV.HAVL.HHZ. 2021-08-26T07:38:27.26 0.3 undecidable manual S 195 69.2751 106 0.45 65
IV.MPNC.HHZ. 2021-08-26T07:38:25.84 0.3 undecidable manual S 2 64.6908 107 0.21 69
IV.SSY.HHZ. 2021-08-26T07:38:22.22 0.3 undecidable manual S 206 50.1165 112 0.27 70
IV.HSRS.HNN. 2021-08-26T07:38:22.87 0.6 undecidable manual S 190 53.0025 111 0.2 47
IV.RAFF.HHZ. 2021-08-26T07:38:21.19 0.3 undecidable manual P 246 92.6406 101 -0.03 68
IV.AIO.HHE. 2021-08-26T07:38:20.82 0.3 undecidable manual S 350 45.8208 114 -0.09 73
IV.HLNI.HHZ. 2021-08-26T07:38:20.40 0.3 undecidable manual S 239 46.3203 114 -0.61 65
IV.SOI.EHE. 2021-08-26T07:38:19.99 0.6 undecidable manual P 48 85.4478 102 -0.14 44
IV.MSRU.HHZ. 2021-08-26T07:38:19.17 0.6 undecidable manual P 12 79.365 103 -0.04 46
IV.HCRL.HHZ. 2021-08-26T07:38:19.71 0.6 undecidable manual S 219 40.2264 118 0.14 49
IV.HMDC.HHZ. 2021-08-26T07:38:19.39 0.3 undecidable manual P 216 82.251 103 -0.25 66
IV.HAGA.HHZ. 2021-08-26T07:38:18.09 0.3 undecidable manual S 206 34.2435 123 -0.09 75
IV.MUCR.HHZ. 2021-08-26T07:38:17.13 0.3 undecidable manual P 324 66.0894 106 -0.1 71
IV.HVZN.HHZ. 2021-08-26T07:38:17.65 0.3 undecidable manual P 232 68.4759 106 0.06 71
IV.MPNC.HHZ. 2021-08-26T07:38:17.04 0.3 undecidable manual P 2 64.6908 107 0.01 72
IV.HAVL.HHZ. 2021-08-26T07:38:17.68 0.1 positive manual P 195 69.2751 106 -0.03 94
IV.MTTG.HHE. 2021-08-26T07:38:16.34 0.6 undecidable manual P 34 58.8966 109 0.16 47
IV.HSRS.HNN. 2021-08-26T07:38:15.29 0.3 undecidable manual P 190 53.0025 111 -0.03 73
IV.EPZF.HHZ. 2021-08-26T07:38:15.34 0.3 undecidable manual P 305 50.0166 112 0.45 67
IV.EPOZ.HHZ. 2021-08-26T07:38:14.76 0.6 undecidable manual S 316 16.7721 145 0 52
IV.SSY.HHZ. 2021-08-26T07:38:14.88 0.1 undecidable manual P 206 50.1165 112 -0.02 98
IV.AIO.HHE. 2021-08-26T07:38:14.13 0.3 undecidable manual P 350 45.8208 114 -0.17 72
IV.EMSG.HHZ. 2021-08-26T07:38:14.33 0.6 undecidable manual P 311 43.3233 116 0.37 46
IV.HLNI.HHZ. 2021-08-26T07:38:13.90 0.1 undecidable manual P 239 46.3203 114 -0.46 90
IV.EPIT.HHZ. 2021-08-26T07:38:13.10 0.3 undecidable manual P 320 36.0417 121 0.14 74
IV.HCRL.HHZ. 2021-08-26T07:38:13.50 0.1 undecidable manual P 219 40.2264 118 -0.03 100
IV.HAGA.HHZ. 2021-08-26T07:38:12.51 0.1 undecidable manual P 206 34.2435 123 -0.22 97
IV.ESAL.HHZ. 2021-08-26T07:38:12.09 0.6 undecidable manual P 322 26.8509 130 0.28 48
IV.EMFO.HHZ. 2021-08-26T07:38:11.94 0.3 undecidable manual P 313 27.9498 129 0.01 77
IV.EPOZ.HHZ. 2021-08-26T07:38:10.45 0.1 undecidable manual P 316 16.7721 145 -0.3 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAGA.HHE. ML:1.5 0.00010581675 0.1408 AML other m 2021-08-26T07:38:18.20
IV.HAGA.HHN. ML:1.6 0.00013066285 0.096 AML other m 2021-08-26T07:38:18.70
IV.HLNI.HHN. ML:1.9 0.00018042225000000002 0.1792 AML other m 2021-08-26T07:38:20.85
IV.HCRL.HHN. ML:1.8 0.000191 1.86 AML other m 2021-08-26T07:38:20.01
IV.HCRL.HHE. ML:2.0 0.0002505 1.84 AML other m 2021-08-26T07:38:21.98
IV.HLNI.HHE. ML:1.8 0.0001388787 0.1408 AML other m 2021-08-26T07:38:21.29
IV.SSY.HHE. ML:2.1 0.00026963005 0.16 AML other m 2021-08-26T07:38:22.79
IV.SSY.HHN. ML:2.4 0.0005550239000000001 0.1024 AML other m 2021-08-26T07:38:22.94
IV.MPNC.HHN. ML:1.7 0.0000874231 0.3008 AML other m 2021-08-26T07:38:26.62
IV.MUCR.HHE. ML:1.5 0.000049833274999999994 0.3776 AML other m 2021-08-26T07:38:27.37
IV.HAVL.HHE. ML:2.2 0.00023511500000000001 0.1024 AML other m 2021-08-26T07:38:27.53
IV.HAVL.HHN. ML:2.2 0.00026021635 0.1984 AML other m 2021-08-26T07:38:27.69
IV.HVZN.HHN. ML:1.9 0.00012764055 0.32 AML other m 2021-08-26T07:38:28.48
IV.HVZN.HNN. ML:2.0 0.00014906504999999997 0.32 AML other m 2021-08-26T07:38:28.48
IV.MPNC.HHE. ML:1.9 0.00013209999999999999 0.44 AML other m 2021-08-26T07:38:29.47
IV.MUCR.HHN. ML:1.4 0.000040710665 0.4608 AML other m 2021-08-26T07:38:29.65
IV.MSRU.HHE. ML:1.8 0.00008018685 1.5776 AML other m 2021-08-26T07:38:31.16
IV.HVZN.HNE. ML:2.0 0.00014840165 0.4608 AML other m 2021-08-26T07:38:31.38
IV.HVZN.HHE. ML:2.0 0.0001515 0.46 AML other m 2021-08-26T07:38:31.38
IV.HMDC.HHN. ML:1.6 0.00004851358 0.1152 AML other m 2021-08-26T07:38:31.78
IV.MSRU.HHN. ML:1.5 0.000044786385 0.3392 AML other m 2021-08-26T07:38:31.98
IV.HMDC.HHE. ML:1.6 0.00004506749 0.16 AML other m 2021-08-26T07:38:32.00
IV.RAFF.HHN. ML:1.8 0.00007005256 0.3584 AML other m 2021-08-26T07:38:34.88
IV.RAFF.HHE. ML:1.8 0.00007683057000000001 0.1984 AML other m 2021-08-26T07:38:35.36
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