Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 20-03-2021 and time 18:09:23 (Italy) in region 3 km SW Belpasso (CT)

A magnitude ML 2.1 earthquake occured in region: 3 km SW Belpasso (CT), on

  • 20-03-2021 17:09:23 (UTC)
  • 20-03-2021 18:09:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.5690, 14.9580 at 7 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
Belpasso CT 3 28108 28108
Camporotondo Etneo CT 4 5023 33131
Paternò CT 5 48228 81359
San Pietro Clarenza CT 6 7743 89102
Motta Sant'Anastasia CT 6 12116 101218
Misterbianco CT 7 49410 150628
Ragalna CT 7 3924 154552
Nicolosi CT 8 7463 162015
Santa Maria di Licodia CT 8 7641 169656
Mascalucia CT 9 31958 201614
Gravina di Catania CT 9 25838 227452
Tremestieri Etneo CT 10 20589 248041
Pedara CT 11 14102 262143
Sant'Agata li Battiati CT 11 9479 271622
Biancavilla CT 11 24007 295629
San Giovanni la Punta CT 12 23060 318689
Trecastagni CT 12 10910 329599
Viagrande CT 13 8563 338162
San Gregorio di Catania CT 13 11966 350128
Catania CT 14 314555 664683
Aci Bonaccorsi CT 14 3524 668207
Valverde CT 15 7840 676047
Adrano CT 15 36122 712169
Aci Sant'Antonio CT 15 17984 730153
Aci Castello CT 17 18723 748876
Aci Catena CT 17 29851 778727
Zafferana Etnea CT 19 9517 788244
Acireale CT 19 52622 840866
Centuripe EN 20 5470 846336

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NW of Catania (314555 inhabitants)
19 Km W of Acireale (52622 inhabitants)
64 Km NW of Siracusa (122291 inhabitants)
74 Km N of Ragusa (73313 inhabitants)
78 Km NE of Vittoria (63339 inhabitants)
79 Km E of Caltanissetta (63360 inhabitants)
81 Km N of Modica (54633 inhabitants)
84 Km NE of Gela (75827 inhabitants)
85 Km SW of Reggio di Calabria (183035 inhabitants)
87 Km SW 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 2.1 2021-03-20
17:09:23		 37.5688 14.958 7 2021-07-12
16:55:15		 Bollettino Sismico Italiano INGV 91446131
Reviewed
Rev200 		ML 1.8 2021-03-20
17:09:23		 37.619 14.933 5 2021-06-17
10:47:32		 Sala Operativa INGV_OE (Catania) 88321511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-20 17:09:23 ± 0.09
Latitude 37.5688 ± 0.0054
Longitude 14.9580 ± 0.0079
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91446131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 707
Semi-minor axis of confidence ellipse (meter) 477
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 93
Circular confidence region, given by single value of horizontal uncertainty (meter) 710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 42
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.07914
Epicentral distance of station farthest from the epicenter (degree) 0.65561
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 22
Type of magnitude ML
Reference to an origin 91446131
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-17 10:46:59

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 88321511
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-03-20 17:20:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RAFF.HHZ. 2021-03-20T17:09:36.17 0.3 undecidable manual P 234 65.0904 50 0.25 66
IV.HAVL.HHZ. 2021-03-20T17:09:36.46 0.3 undecidable manual P 168 69.0753 50 -0.09 69
IV.MPNC.HHZ. 2021-03-20T17:09:36.96 0.3 undecidable manual P 28 72.7716 50 -0.16 68
IV.MUCR.HHZ. 2021-03-20T17:09:34.59 0.3 undecidable manual P 352 53.1024 50 0.51 63
IV.ESCV.HHZ. 2021-03-20T17:09:33.30 0.6 undecidable manual S 328 23.3544 107 0.81 40
IV.AIO.HHZ. 2021-03-20T17:09:33.48 0.3 undecidable manual P 28 50.7159 50 -0.23 70
IV.SSY.HHZ. 2021-03-20T17:09:33.04 0.3 undecidable manual P 167 46.7199 50 -0.06 72
IV.ECBD.HHN. 2021-03-20T17:09:33.22 0.6 undecidable manual S 26 26.0517 106 -0.14 49
IV.GALF.HHZ. 2021-03-20T17:09:32.42 0.3 undecidable manual P 295 37.8288 101 0.72 60
IV.EMCN.HHN. 2021-03-20T17:09:32.96 0.6 undecidable manual S 15 25.5522 106 -0.24 48
IV.ECZM.HHN. 2021-03-20T17:09:31.73 0.6 undecidable manual S 345 18.6702 111 0.8 41
IV.ESVO.HHE. 2021-03-20T17:09:31.92 0.6 undecidable manual S 358 22.6551 108 -0.33 47
IV.EMFO.HHE. 2021-03-20T17:09:31.68 0.6 undecidable manual S 32 21.867 108 -0.3 48
IV.ESPC.HHN. 2021-03-20T17:09:30.28 0.6 undecidable manual S 24 14.9739 116 0.5 46
IV.HCRL.HHZ. 2021-03-20T17:09:30.74 0.3 undecidable manual P 168 32.3454 103 0.1 73
IV.EMFS.HHE. 2021-03-20T17:09:30.87 0.6 undecidable manual S 12 17.0718 113 0.44 47
IV.EPIT.HHZ. 2021-03-20T17:09:29.70 0.1 undecidable manual P 18 28.2495 104 -0.14 97
IV.EMNR.HHZ. 2021-03-20T17:09:29.49 0.3 undecidable manual P 12 28.1496 104 -0.32 70
IV.ECHR.HHE. 2021-03-20T17:09:29.19 0.6 undecidable manual S 343 13.5753 118 -0.15 49
IV.ESAL.HHZ. 2021-03-20T17:09:29.48 0.3 undecidable manual P 37 25.8519 106 0.12 73
IV.ESLN.HHZ. 2021-03-20T17:09:29.70 0.6 undecidable manual S 6 13.875 118 0.27 49
IV.EMPL.HHZ. 2021-03-20T17:09:29.66 0.6 undecidable manual S 5 12.2766 121 0.72 43
IV.EMSG.HHZ. 2021-03-20T17:09:29.92 0.3 undecidable manual P 359 27.9498 105 0.15 73
IV.HLNI.HHZ. 2021-03-20T17:09:29.35 0.3 undecidable manual P 197 25.5522 106 0.03 75
IV.ESVO.HHE. 2021-03-20T17:09:29.31 0.3 undecidable manual P 358 22.6551 108 0.55 67
IV.EPOZ.HHZ. 2021-03-20T17:09:29.81 0.3 undecidable manual P 60 23.2545 107 0.94 57
IV.EVRN.HNN. 2021-03-20T17:09:28.58 0.3 undecidable manual P 49 20.5683 109 0.23 73
IV.ECBD.HHN. 2021-03-20T17:09:28.90 0.1 undecidable manual P 26 26.0517 106 -0.5 90
IV.EMCN.HHN. 2021-03-20T17:09:28.84 0.1 undecidable manual P 15 25.5522 106 -0.47 91
IV.ESCV.HHZ. 2021-03-20T17:09:28.94 0.3 undecidable manual P 328 23.3544 107 0.04 75
IV.EMFO.HHE. 2021-03-20T17:09:28.10 0.1 undecidable manual P 32 21.867 108 -0.5 91
IV.ENIC.HHZ. 2021-03-20T17:09:28.49 0.3 undecidable manual S 39 8.88 129 0.51 70
IV.EMFS.HHE. 2021-03-20T17:09:27.62 0.1 undecidable manual P 12 17.0718 113 -0.09 100
IV.ESML.HHZ. 2021-03-20T17:09:27.69 0.6 undecidable manual S 308 8.7801 130 -0.26 48
IV.ESPC.HHN. 2021-03-20T17:09:27.23 0.3 undecidable manual P 24 14.9739 116 -0.1 75
IV.ECZM.HHN. 2021-03-20T17:09:27.71 0.3 undecidable manual P 345 18.6702 111 -0.28 72
IV.ECPN.HHZ. 2021-03-20T17:09:27.84 0.3 undecidable manual P 7 19.5693 110 -0.33 71
IV.EMPL.HHZ. 2021-03-20T17:09:26.71 0.1 negative manual P 5 12.2766 121 -0.13 100
IV.ENIC.HHZ. 2021-03-20T17:09:26.79 0.3 undecidable manual P 39 8.88 129 0.5 70
IV.ECHR.HHE. 2021-03-20T17:09:26.59 0.1 undecidable manual P 343 13.5753 118 -0.49 92
IV.ESLN.HHZ. 2021-03-20T17:09:26.97 0.1 undecidable manual P 6 13.875 118 -0.16 99
IV.ESML.HHZ. 2021-03-20T17:09:25.84 0.1 negative manual P 308 8.7801 130 -0.44 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HHE. ML:2.6 0.00749 0.28 AML other m 2021-03-20T17:09:27.95
IV.ESML.HNE. ML:2.6 0.007064999999999999 0.28 AML other m 2021-03-20T17:09:27.96
IV.ESML.HHN. ML:2.5 0.005595000000000001 0.28 AML other m 2021-03-20T17:09:27.96
IV.ESML.HNN. ML:2.5 0.00491 0.3 AML other m 2021-03-20T17:09:27.97
IV.EMPL.HHN. ML:2.8 0.008605 0.66 AML other m 2021-03-20T17:09:30.02
IV.EMPL.HHE. ML:2.8 0.00813 0.9 AML other m 2021-03-20T17:09:32.44
IV.ESCV.HHE. ML:2.0 0.000733 1.34 AML other m 2021-03-20T17:09:34.25
IV.HLNI.HHN. ML:1.5 0.00018099999999999998 0.78 AML other m 2021-03-20T17:09:35.74
IV.ESAL.HHN. ML:2.1 0.0007289999999999999 0.9 AML other m 2021-03-20T17:09:35.53
IV.EPIT.HHE. ML:2.1 0.0006545000000000001 0.98 AML other m 2021-03-20T17:09:36.62
IV.HLNI.HHE. ML:1.4 0.00016599999999999997 0.52 AML other m 2021-03-20T17:09:36.55
IV.ESAL.HHE. ML:2.2 0.00095 0.8 AML other m 2021-03-20T17:09:37.03
IV.ESCV.HHN. ML:2.2 0.0010525 0.32 AML other m 2021-03-20T17:09:38.21
IV.EMSG.HHN. ML:2.2 0.0008539999999999999 0.48 AML other m 2021-03-20T17:09:39.58
IV.EPIT.HHN. ML:2.3 0.001009 0.52 AML other m 2021-03-20T17:09:40.34
IV.EMSG.HHE. ML:2.2 0.0008685 1.36 AML other m 2021-03-20T17:09:40.29
IV.AIO.HHE. ML:1.5 0.00008774999999999999 1.78 AML other m 2021-03-20T17:09:44.91
IV.MUCR.HHE. ML:1.8 0.000143 0.5 AML other m 2021-03-20T17:09:46.39
IV.AIO.HHN. ML:1.6 0.00010159999999999999 0.44 AML other m 2021-03-20T17:09:46.78
IV.HAVL.HHN. ML:2.1 0.000227 0.96 AML other m 2021-03-20T17:09:50.24
IV.MUCR.HHN. ML:1.7 0.00013225000000000002 0.54 AML other m 2021-03-20T17:09:52.34
IV.HAVL.HHE. ML:2.0 0.0001795 0.48 AML other m 2021-03-20T17:09:58.38
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