Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 04-02-2021 and time 11:28:31 (Italy) in region 4 km N Ragalna (CT)

A magnitude ML 2.3 earthquake occured in region: 4 km N Ragalna (CT), on

  • 04-02-2021 10:28:31 (UTC)
  • 04-02-2021 11:28:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6670, 14.9500 at 14 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
Ragalna CT 4 3924 3924
Biancavilla CT 8 24007 27931
Santa Maria di Licodia CT 8 7641 35572
Belpasso CT 9 28108 63680
Nicolosi CT 9 7463 71143
Adrano CT 10 36122 107265
Paternò CT 11 48228 155493
Pedara CT 11 14102 169595
Camporotondo Etneo CT 12 5023 174618
San Pietro Clarenza CT 12 7743 182361
Trecastagni CT 13 10910 193271
Mascalucia CT 14 31958 225229
Zafferana Etnea CT 14 9517 234746
Viagrande CT 14 8563 243309
Tremestieri Etneo CT 15 20589 263898
Gravina di Catania CT 15 25838 289736
Aci Bonaccorsi CT 16 3524 293260
Milo CT 16 1087 294347
San Giovanni la Punta CT 16 23060 317407
Sant'Agata li Battiati CT 17 9479 326886
Santa Venerina CT 17 8592 335478
Misterbianco CT 17 49410 384888
Aci Sant'Antonio CT 17 17984 402872
Bronte CT 17 19172 422044
Motta Sant'Anastasia CT 17 12116 434160
San Gregorio di Catania CT 18 11966 446126
Valverde CT 18 7840 453966
Aci Catena CT 18 29851 483817
Centuripe EN 19 5470 489287
Sant'Alfio CT 19 1582 490869
Maletto CT 20 3920 494789

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km W of Acireale (52622 inhabitants)
22 Km NW of Catania (314555 inhabitants)
74 Km NW of Siracusa (122291 inhabitants)
78 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km SW of Messina (238439 inhabitants)
81 Km E of Caltanissetta (63360 inhabitants)
85 Km N of Ragusa (73313 inhabitants)
88 Km NE of Vittoria (63339 inhabitants)
91 Km NE of Gela (75827 inhabitants)
91 Km N of Modica (54633 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 2.3 2021-02-04
10:28:31		 37.6667 14.9495 14 2021-07-12
16:55:00		 Bollettino Sismico Italiano INGV 87718921
Reviewed
Rev200 		ML 2.1 2021-02-04
10:28:30		 37.655 14.929 15 2021-03-22
12:13:32		 Sala Operativa INGV_OE (Catania) 86828921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-04 10:28:31 ± 0.08
Latitude 37.6667 ± 0.0036
Longitude 14.9495 ± 0.0068
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87718921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 578
Semi-minor axis of confidence ellipse (meter) 164
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 281
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 35
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 53
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.02068
Epicentral distance of station farthest from the epicenter (degree) 0.71946
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 32
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 86828921
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-02-04 10:33:53

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 27
Type of magnitude ML
Reference to an origin 87718921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-22 12:13:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-02-04T10:28:55.55 0.6 undecidable manual S 169 79.8645 93 0.45 40
IV.HMDC.HHZ. 2021-02-04T10:28:55.74 0.6 undecidable manual S 191 79.8645 93 0.65 38
IV.RAFF.HHZ. 2021-02-04T10:28:53.96 0.6 undecidable manual S 227 71.373 93 1.12 31
IV.SSY.HHZ. 2021-02-04T10:28:49.81 0.3 undecidable manual S 169 57.498 94 0.68 59
IV.HVZN.HHZ. 2021-02-04T10:28:49.02 0.6 undecidable manual S 201 57.9975 94 -0.23 44
IV.NOV.HHZ. 2021-02-04T10:28:46.13 0.6 undecidable manual S 22 43.3233 96 0.78 38
IV.HAGA.HHZ. 2021-02-04T10:28:46.28 0.6 undecidable manual S 157 46.0206 95 0.2 45
IV.MUCR.HHE. 2021-02-04T10:28:45.79 0.6 undecidable manual S 351 42.2244 96 0.71 39
IV.HCRL.HHZ. 2021-02-04T10:28:45.52 0.6 undecidable manual S 170 43.1235 96 0.2 46
IV.HMDC.HHZ. 2021-02-04T10:28:45.54 0.3 undecidable manual P 191 79.8645 93 0.5 60
IV.HAVL.HHZ. 2021-02-04T10:28:44.60 0.1 undecidable manual P 169 79.8645 93 -0.44 81
IV.RAFF.HHZ. 2021-02-04T10:28:43.43 0.1 undecidable manual P 227 71.373 93 -0.31 85
IV.HLNI.HHZ. 2021-02-04T10:28:43.51 0.6 undecidable manual S 191 35.9418 98 0.11 47
IV.ECTS.HHZ. 2021-02-04T10:28:42.20 0.3 undecidable manual S 32 28.2495 101 0.82 58
IV.HVZN.HHZ. 2021-02-04T10:28:41.81 0.3 undecidable manual P 201 57.9975 94 0.14 67
IV.SSY.HHZ. 2021-02-04T10:28:41.33 0.1 undecidable manual P 169 57.498 94 -0.27 87
IV.HAGA.HHZ. 2021-02-04T10:28:39.28 0.1 undecidable manual P 157 46.0206 95 -0.55 83
IV.MUCR.HHE. 2021-02-04T10:28:39.06 0.3 undecidable manual P 351 42.2244 96 -0.2 69
IV.NOV.HHZ. 2021-02-04T10:28:39.25 0.3 undecidable manual P 22 43.3233 96 -0.16 69
IV.CAGR.HHE. 2021-02-04T10:28:39.50 0.3 undecidable manual P 263 39.8268 97 0.62 61
IV.AIO.HHZ. 2021-02-04T10:28:39.03 0.3 undecidable manual P 36 41.9247 96 -0.17 69
IV.EMSG.HHZ. 2021-02-04T10:28:38.67 0.6 undecidable manual S 0 17.0718 116 0.13 48
IV.EPZF.HHZ. 2021-02-04T10:28:38.61 0.6 undecidable manual S 335 19.2696 112 -0.46 45
IV.HCRL.HHZ. 2021-02-04T10:28:38.94 0.3 undecidable manual P 170 43.1235 96 -0.45 65
IV.HLNI.HHZ. 2021-02-04T10:28:38.00 0.3 undecidable manual P 191 35.9418 98 -0.29 68
IV.ESCV.HHZ. 2021-02-04T10:28:38.10 0.6 undecidable manual S 307 14.7741 121 0.1 49
IV.GALF.HHZ. 2021-02-04T10:28:38.25 0.1 undecidable manual P 278 33.9438 99 0.26 91
IV.ESML.HHZ. 2021-02-04T10:28:37.22 0.6 undecidable manual S 229 8.1807 143 0.53 45
IV.ESVO.HHZ. 2021-02-04T10:28:37.30 0.6 undecidable manual S 359 11.7771 130 -0.06 50
IV.ECZM.HHZ. 2021-02-04T10:28:37.11 0.6 undecidable manual S 331 8.1807 143 0.42 46
IV.EPOZ.HNZ. 2021-02-04T10:28:36.32 0.3 undecidable manual P 88 20.9679 109 0.28 70
IV.ESLN.HHZ. 2021-02-04T10:28:36.40 0.6 undecidable manual S 36 3.6963 162 0.26 48
IV.ECHR.HNZ. 2021-02-04T10:28:36.87 0.6 undecidable manual S 304 3.8961 161 0.72 42
IV.ECTS.HHZ. 2021-02-04T10:28:36.78 0.3 undecidable manual P 32 28.2495 101 -0.33 68
IV.ESPC.HHZ. 2021-02-04T10:28:36.27 0.6 undecidable manual S 67 7.3815 146 -0.3 47
IV.ESAL.HHZ. 2021-02-04T10:28:36.15 0.6 undecidable manual P 59 18.9699 112 0.4 46
IV.EMPL.HHZ. 2021-02-04T10:28:36.45 0.6 undecidable manual S 53 2.2977 169 0.41 47
IV.EMCN.HHN. 2021-02-04T10:28:35.25 0.6 undecidable manual P 28 15.6732 119 -0.04 50
IV.ECBD.HHZ. 2021-02-04T10:28:35.72 0.3 undecidable manual P 44 17.3715 115 0.19 72
IV.EMSG.HHZ. 2021-02-04T10:28:35.49 0.1 positive manual P 0 17.0718 116 0.01 99
IV.EMFO.HHZ. 2021-02-04T10:28:35.06 0.6 undecidable manual P 58 14.5743 122 -0.08 49
IV.EPIT.HHZ. 2021-02-04T10:28:35.69 0.3 undecidable manual P 30 18.5703 113 0 74
IV.EPZF.HHZ. 2021-02-04T10:28:35.58 0.1 undecidable manual P 335 19.2696 112 -0.21 95
IV.ENIC.HHZ. 2021-02-04T10:28:34.31 0.3 undecidable manual P 122 7.4814 146 -0.04 75
IV.ESVO.HHZ. 2021-02-04T10:28:34.93 0.1 undecidable manual P 359 11.7771 130 0.13 98
IV.EMFS.HHE. 2021-02-04T10:28:34.29 0.3 undecidable manual P 36 7.2927 147 -0.04 75
IV.ECZM.HHZ. 2021-02-04T10:28:34.16 0.1 positive manual P 331 8.1807 143 -0.25 96
IV.ESCV.HHZ. 2021-02-04T10:28:34.68 0.1 positive manual P 307 14.7741 121 -0.49 90
IV.EMPL.HHZ. 2021-02-04T10:28:33.94 0.1 negative manual P 53 2.2977 169 -0.09 100
IV.ESML.HHZ. 2021-02-04T10:28:33.87 0.1 negative manual P 229 8.1807 143 -0.54 89
IV.ESLN.HHZ. 2021-02-04T10:28:33.76 0.1 undecidable manual P 36 3.6963 162 -0.33 95
IV.ECHR.HNZ. 2021-02-04T10:28:33.92 0.3 undecidable manual P 304 3.8961 161 -0.18 74
IV.ESPC.HHZ. 2021-02-04T10:28:33.82 0.1 undecidable manual P 67 7.3815 146 -0.52 90
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMPL.HHE. ML:2.8 0.00837 1.82 AML other m 2021-02-04T10:28:36.08
IV.EMPL.HHN. ML:2.6 0.0056704715 0.2176 AML other m 2021-02-04T10:28:37.02
IV.ESML.HHE. ML:2.2 0.001885639 0.1984 AML other m 2021-02-04T10:28:37.38
IV.ENIC.HHN. ML:2.3 0.002254559 0.5824 AML other m 2021-02-04T10:28:37.88
IV.ESML.HHN. ML:2.1 0.001254863 0.8576 AML other m 2021-02-04T10:28:37.72
IV.ENIC.HNN. ML:2.4 0.002714683 0.1984 AML other m 2021-02-04T10:28:37.68
IV.ESCV.HHN. ML:2.4 0.002159981 0.2624 AML other m 2021-02-04T10:28:38.39
IV.ESCV.HHE. ML:2.2 0.0014750895 0.1984 AML other m 2021-02-04T10:28:38.93
IV.EMSG.HHN. ML:2.5 0.00263267 0.4992 AML other m 2021-02-04T10:28:39.82
IV.EMSG.HHE. ML:2.4 0.0019473560000000001 0.3584 AML other m 2021-02-04T10:28:39.95
IV.EPZF.HHE. ML:2.1 0.0009124754 0.384 AML other m 2021-02-04T10:28:40.81
IV.ESML.HNE. ML:1.2 0.000173279845 1.2416 AML other m 2021-02-04T10:28:41.46
IV.EPZF.HHN. ML:2.4 0.00157 0.7 AML other m 2021-02-04T10:28:41.47
IV.HLNI.HHN. ML:1.8 0.00024117604999999997 0.2432 AML other m 2021-02-04T10:28:43.68
IV.HLNI.HHE. ML:2.1 0.0005194271500000001 0.2624 AML other m 2021-02-04T10:28:44.25
IV.HCRL.HHE. ML:2.1 0.00040166884999999995 0.3008 AML other m 2021-02-04T10:28:45.88
IV.HCRL.HHN. ML:1.9 0.00026109645000000004 0.3008 AML other m 2021-02-04T10:28:46.23
IV.AIO.HHE. ML:1.7 0.00014748335000000002 0.3584 AML other m 2021-02-04T10:28:46.51
IV.NOV.HHE. ML:2.4 0.0007968323499999999 0.544 AML other m 2021-02-04T10:28:46.58
IV.HAGA.HHE. ML:2.2 0.00047950000000000005 0.48 AML other m 2021-02-04T10:28:46.79
IV.HAGA.HHN. ML:1.9 0.00022826525 0.3584 AML other m 2021-02-04T10:28:46.74
IV.NOV.HHN. ML:2.3 0.0006132184 1.7216 AML other m 2021-02-04T10:28:46.81
IV.SSY.HHE. ML:2.9 0.001675308 0.32 AML other m 2021-02-04T10:28:50.10
IV.HVZN.HHN. ML:2.2 0.0003269839 1.6192 AML other m 2021-02-04T10:28:51.02
IV.HVZN.HNN. ML:2.2 0.00036518745 1.6768 AML other m 2021-02-04T10:28:51.06
IV.HAVL.HHN. ML:2.7 0.0007034551499999999 0.1792 AML other m 2021-02-04T10:28:56.30
IV.HAVL.HHE. ML:2.6 0.00057695505 0.3456 AML other m 2021-02-04T10:28:56.62
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