Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 26-03-2021 and time 03:08:54 (UTC) in region 2 km W Nicolosi (CT)

A magnitude ML 1.8 earthquake occured in region: 2 km W Nicolosi (CT), on

  • 26-03-2021 03:08:54 (UTC)
  • 26-03-2021 04:08:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6050, 15.0020 at 8 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
Nicolosi CT 3 7463 7463
Belpasso CT 3 28108 35571
San Pietro Clarenza CT 4 7743 43314
Camporotondo Etneo CT 4 5023 48337
Pedara CT 5 14102 62439
Mascalucia CT 6 31958 94397
Ragalna CT 6 3924 98321
Tremestieri Etneo CT 7 20589 118910
Trecastagni CT 7 10910 129820
Gravina di Catania CT 7 25838 155658
Viagrande CT 8 8563 164221
Sant'Agata li Battiati CT 9 9479 173700
San Giovanni la Punta CT 9 23060 196760
Misterbianco CT 9 49410 246170
Paternò CT 9 48228 294398
Aci Bonaccorsi CT 9 3524 297922
Santa Maria di Licodia CT 10 7641 305563
San Gregorio di Catania CT 10 11966 317529
Motta Sant'Anastasia CT 11 12116 329645
Aci Sant'Antonio CT 11 17984 347629
Valverde CT 11 7840 355469
Biancavilla CT 12 24007 379476
Aci Catena CT 12 29851 409327
Zafferana Etnea CT 14 9517 418844
Catania CT 14 314555 733399
Aci Castello CT 14 18723 752122
Acireale CT 15 52622 804744
Santa Venerina CT 15 8592 813336
Adrano CT 16 36122 849458
Milo CT 17 1087 850545
Sant'Alfio CT 20 1582 852127

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NW of Catania (314555 inhabitants)
15 Km W of Acireale (52622 inhabitants)
66 Km NW of Siracusa (122291 inhabitants)
79 Km N of Ragusa (73313 inhabitants)
80 Km SW of Reggio di Calabria (183035 inhabitants)
82 Km SW of Messina (238439 inhabitants)
84 Km NE of Vittoria (63339 inhabitants)
84 Km E of Caltanissetta (63360 inhabitants)
86 Km N of Modica (54633 inhabitants)
89 Km NE of Gela (75827 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 2021-03-26
03:08:54		 37.605 15.0025 8 2021-07-12
16:55:05		 Bollettino Sismico Italiano INGV 88845841
Reviewed
Rev200 		ML 1.3 2021-03-26
03:08:54		 37.649 14.97 4 2021-04-06
16:39:08		 Sala Operativa INGV_OE (Catania) 88479031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-26 03:08:54 ± 0.09
Latitude 37.6050 ± 0.0045
Longitude 15.0025 ± 0.0091
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88845841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 677
Semi-minor axis of confidence ellipse (meter) 542
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
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) 121
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.03058
Epicentral distance of station farthest from the epicenter (degree) 0.65201
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 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 88845841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-06 16:38:50

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 88479031
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-03-26 03:38:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-03-26T03:09:17.94 0.6 undecidable manual S 172 72.372 50 0.77 38
IV.SSY.HHZ. 2021-03-26T03:09:12.00 0.6 undecidable manual S 173 50.0166 50 0.79 39
IV.HAVL.HHZ. 2021-03-26T03:09:07.33 0.3 undecidable manual P 172 72.372 50 -0.3 65
IV.HCRL.HHZ. 2021-03-26T03:09:07.62 0.6 undecidable manual S 176 35.8419 102 0.33 46
IV.HLNI.HHZ. 2021-03-26T03:09:05.95 0.6 undecidable manual S 202 30.6471 104 0.39 46
IV.SSY.HHZ. 2021-03-26T03:09:04.04 0.3 undecidable manual P 173 50.0166 50 -0.15 70
IV.ECZM.HHN. 2021-03-26T03:09:01.55 0.6 undecidable manual S 328 16.4724 114 0.68 43
IV.HCRL.HHZ. 2021-03-26T03:09:01.59 0.3 undecidable manual P 176 35.8419 102 -0.34 69
IV.EPZF.HHZ. 2021-03-26T03:09:00.60 0.3 undecidable manual P 332 27.4503 105 0.3 71
IV.HLNI.HHZ. 2021-03-26T03:09:00.32 0.3 undecidable manual P 202 30.6471 104 -0.61 65
IV.EMPL.HHZ. 2021-03-26T03:08:59.06 0.6 undecidable manual S 341 8.6802 131 0.48 47
IV.ESCV.HHZ. 2021-03-26T03:08:59.66 0.3 undecidable manual P 314 22.755 108 0.26 72
IV.EMFS.HHE. 2021-03-26T03:08:59.44 0.6 undecidable manual S 358 12.6762 120 -0.28 49
IV.ESML.HHZ. 2021-03-26T03:08:59.09 0.6 undecidable manual S 278 10.878 124 -0.1 51
IV.EMSG.HHN. 2021-03-26T03:08:59.95 0.3 undecidable manual P 349 24.3534 107 0.24 72
IV.EPIT.HHZ. 2021-03-26T03:08:59.52 0.3 undecidable manual P 12 23.3544 108 0 76
IV.EMNR.HHZ. 2021-03-26T03:08:59.36 0.3 undecidable manual P 5 23.5542 108 -0.2 73
IV.ESPC.HHN. 2021-03-26T03:08:59.02 0.6 undecidable manual S 13 9.9789 127 0.1 51
IV.ESVO.HHE. 2021-03-26T03:08:59.20 0.3 undecidable manual P 345 19.2696 111 0.46 70
IV.ESLN.HHZ. 2021-03-26T03:08:59.19 0.6 undecidable manual S 346 10.0788 126 0.23 50
IV.ECHR.HHE. 2021-03-26T03:08:59.90 0.6 undecidable manual S 319 11.9769 122 0.4 48
IV.ECZM.HHN. 2021-03-26T03:08:58.27 0.3 undecidable manual P 328 16.4724 114 0.05 76
IV.ENIC.HHZ. 2021-03-26T03:08:58.18 0.6 undecidable manual S 30 3.3966 156 0.73 43
IV.EMCN.HHN. 2021-03-26T03:08:58.60 0.3 undecidable manual P 8 20.868 110 -0.44 70
IV.EVRN.HHZ. 2021-03-26T03:08:58.22 0.3 undecidable manual P 51 14.9739 117 0.27 73
IV.EMFO.HHE. 2021-03-26T03:08:57.98 0.3 undecidable manual P 28 16.3725 114 -0.23 73
IV.ECHR.HHE. 2021-03-26T03:08:57.10 0.1 undecidable manual P 319 11.9769 122 -0.33 97
IV.EMFS.HHE. 2021-03-26T03:08:57.24 0.3 undecidable manual P 358 12.6762 120 -0.31 73
IV.ESPC.HHN. 2021-03-26T03:08:56.87 0.1 undecidable manual P 13 9.9789 127 -0.22 99
IV.ENIC.HHZ. 2021-03-26T03:08:56.37 0.3 undecidable manual P 30 3.3966 156 0.13 77
IV.ESLN.HHZ. 2021-03-26T03:08:56.86 0.1 undecidable manual P 346 10.0788 126 -0.26 98
IV.EMPL.HHZ. 2021-03-26T03:08:56.70 0.1 negative manual P 341 8.6802 131 -0.19 100
IV.ESML.HHZ. 2021-03-26T03:08:56.84 0.1 positive manual P 278 10.878 124 -0.41 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HHN. ML:2.1 0.001655 1.36 AML other m 2021-03-26T03:08:59.92
IV.ESML.HNN. ML:2.0 0.0015499999999999997 1.36 AML other m 2021-03-26T03:08:59.93
IV.EMPL.HHN. ML:2.5 0.005195 0.16 AML other m 2021-03-26T03:09:01.49
IV.ESML.HHE. ML:2.1 0.0016600000000000002 0.18 AML other m 2021-03-26T03:09:01.59
IV.ESML.HNE. ML:2.0 0.00147 0.16 AML other m 2021-03-26T03:09:01.51
IV.EVRN.HNN. ML:1.8 0.000637 0.9 AML other m 2021-03-26T03:09:02.00
IV.EVRN.HHE. ML:1.8 0.0006435 0.86 AML other m 2021-03-26T03:09:02.44
IV.EVRN.HHN. ML:1.7 0.0005595 0.96 AML other m 2021-03-26T03:09:03.77
IV.EMPL.HHE. ML:2.4 0.0037199999999999998 0.5 AML other m 2021-03-26T03:09:03.51
IV.EVRN.HNE. ML:1.7 0.0005484999999999999 0.5 AML other m 2021-03-26T03:09:04.78
IV.ESCV.HHE. ML:1.8 0.0004075 1.18 AML other m 2021-03-26T03:09:05.95
IV.EPZF.HHE. ML:1.5 0.000176 1.66 AML other m 2021-03-26T03:09:07.98
IV.EPZF.HHN. ML:1.6 0.00020515 0.6 AML other m 2021-03-26T03:09:07.20
IV.ESCV.HHN. ML:1.8 0.000483 1.04 AML other m 2021-03-26T03:09:07.77
IV.HAGA.HHE. ML:1.4 0.00008874999999999999 1 AML other m 2021-03-26T03:09:08.70
IV.HAGA.HHN. ML:1.5 0.00011325 1.16 AML other m 2021-03-26T03:09:09.85
IV.HCRL.HHE. ML:1.5 0.0001205 0.44 AML other m 2021-03-26T03:09:10.72
IV.SSY.HHE. ML:2.0 0.00027949999999999996 0.98 AML other m 2021-03-26T03:09:14.21
IV.HCRL.HHN. ML:1.4 0.0000995 1.34 AML other m 2021-03-26T03:09:14.71
IV.SSY.HHN. ML:2.3 0.000481 0.66 AML other m 2021-03-26T03:09:16.52
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