Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 20-07-2021 and time 23:53:40 (UTC) in region 3 km NE Paternò (CT)

A magnitude ML 1.7 earthquake occured in region: 3 km NE Paternò (CT), on

  • 20-07-2021 23:53:40 (UTC)
  • 21-07-2021 01:53:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6000, 14.9190 at 6 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Paternò CT 3 48228 48228
Santa Maria di Licodia CT 3 7641 55869
Ragalna CT 4 3924 59793
Belpasso CT 5 28108 87901
Biancavilla CT 6 24007 111908
Camporotondo Etneo CT 9 5023 116931
Nicolosi CT 10 7463 124394
San Pietro Clarenza CT 10 7743 132137
Adrano CT 10 36122 168259
Motta Sant'Anastasia CT 11 12116 180375
Misterbianco CT 12 49410 229785
Mascalucia CT 12 31958 261743
Pedara CT 13 14102 275845
Gravina di Catania CT 13 25838 301683
Tremestieri Etneo CT 14 20589 322272
Trecastagni CT 14 10910 333182
Sant'Agata li Battiati CT 15 9479 342661
Viagrande CT 16 8563 351224
San Giovanni la Punta CT 16 23060 374284
Centuripe EN 16 5470 379754
Aci Bonaccorsi CT 17 3524 383278
San Gregorio di Catania CT 17 11966 395244
Catania CT 18 314555 709799
Valverde CT 18 7840 717639
Aci Sant'Antonio CT 18 17984 735623
Zafferana Etnea CT 19 9517 745140
Aci Catena CT 20 29851 774991

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Catania (314555 inhabitants)
22 Km W of Acireale (52622 inhabitants)
69 Km NW of Siracusa (122291 inhabitants)
77 Km E of Caltanissetta (63360 inhabitants)
77 Km N of Ragusa (73313 inhabitants)
80 Km NE of Vittoria (63339 inhabitants)
84 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 1.7 2021-07-20
23:53:40		 37.6002 14.9192 6 2021-12-29
11:12:50		 Bollettino Sismico Italiano INGV 97216151
Reviewed
Rev200 		ML 1.5 2021-07-20
23:53:40		 37.638 14.921 7 2021-11-03
20:59:32		 Sala Operativa INGV_OE (Catania) 93002191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-20 23:53:40 ± 0.13
Latitude 37.6002 ± 0.0063
Longitude 14.9192 ± 0.0102
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97216151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 822
Semi-minor axis of confidence ellipse (meter) 624
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 86
Circular confidence region, given by single value of horizontal uncertainty (meter) 820.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
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) 0.03597
Epicentral distance of station farthest from the epicenter (degree) 0.66010
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 93002191
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-07-21 00:07:04

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 97216151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-03 20:58:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-07-20T23:53:53.93 0.3 undecidable manual P 166 73.2711 50 -0.32 64
IV.HLNI.HHZ. 2021-07-20T23:53:52.33 0.6 undecidable manual S 188 28.2495 103 1.37 30
IV.SSY.HHZ. 2021-07-20T23:53:50.70 0.3 undecidable manual P 164 50.9157 50 -0.1 70
IV.EFIU.HHZ. 2021-07-20T23:53:48.06 0.3 undecidable manual P 50 33.0447 101 0.39 68
IV.ESCV.HHZ. 2021-07-20T23:53:48.17 0.6 undecidable manual S 331 18.6702 109 0.41 46
IV.HLNI.HHZ. 2021-07-20T23:53:46.79 0.3 undecidable manual P 188 28.2495 103 0.07 73
IV.EMSG.HHZ. 2021-07-20T23:53:46.45 0.3 undecidable manual P 6 24.6531 104 0.44 68
IV.EPZF.HHZ. 2021-07-20T23:53:46.65 0.3 undecidable manual P 348 25.4523 104 0.48 67
IV.EPIT.HHZ. 2021-07-20T23:53:46.50 0.3 undecidable manual P 27 26.3514 103 0.15 72
IV.ESPC.HHN. 2021-07-20T23:53:46.48 0.6 undecidable manual S 43 13.9749 114 0.24 48
IV.ECZM.HHN. 2021-07-20T23:53:46.77 0.6 undecidable manual S 355 14.5743 113 0.33 47
IV.ESLN.HHZ. 2021-07-20T23:53:45.84 0.6 undecidable manual S 25 11.3775 119 0.4 47
IV.ESVO.HHE. 2021-07-20T23:53:45.54 0.3 undecidable manual P 7 19.3695 108 0.54 67
IV.EMPL.HHZ. 2021-07-20T23:53:45.01 0.6 undecidable manual S 27 9.7791 123 0.04 51
IV.ECHR.HHE. 2021-07-20T23:53:45.08 0.6 undecidable manual S 357 9.5793 123 0.18 49
IV.EMFS.HHE. 2021-07-20T23:53:44.00 0.3 undecidable manual P 28 14.9739 113 -0.17 73
IV.ESCV.HHZ. 2021-07-20T23:53:44.81 0.1 undecidable manual P 331 18.6702 109 -0.06 99
IV.ESPC.HHN. 2021-07-20T23:53:43.74 0.1 undecidable manual P 43 13.9749 114 -0.25 96
IV.ENIC.HHZ. 2021-07-20T23:53:43.33 0.1 undecidable manual P 69 9.6792 123 0.1 100
IV.ECZM.HHN. 2021-07-20T23:53:43.74 0.1 undecidable manual P 355 14.5743 113 -0.37 94
IV.ESML.HNZ. 2021-07-20T23:53:43.44 0.6 undecidable manual S 300 3.996 147 -0.08 51
IV.ESLN.HHZ. 2021-07-20T23:53:43.08 0.1 undecidable manual P 25 11.3775 119 -0.46 92
IV.EMPL.HHZ. 2021-07-20T23:53:42.90 0.1 undecidable manual P 27 9.7791 123 -0.36 95
IV.ECHR.HHE. 2021-07-20T23:53:42.63 0.1 undecidable manual P 357 9.5793 123 -0.58 89
IV.ESML.HNZ. 2021-07-20T23:53:42.12 0.1 positive manual P 300 3.996 147 -0.3 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMPL.HHN. ML:2.6 0.006189999999999999 0.24 AML other m 2021-07-20T23:53:46.68
IV.ENIC.HHN. ML:1.8 0.0011099999999999999 0.18 AML other m 2021-07-20T23:53:48.32
IV.ENIC.HNN. ML:1.9 0.00125 0.62 AML other m 2021-07-20T23:53:48.34
IV.EMPL.HHE. ML:2.4 0.0035499999999999998 0.2 AML other m 2021-07-20T23:53:48.38
IV.ENIC.HNE. ML:2.0 0.0015400000000000001 1.02 AML other m 2021-07-20T23:53:49.01
IV.ENIC.HHE. ML:1.9 0.00133 0.32 AML other m 2021-07-20T23:53:50.00
IV.ESCV.HHE. ML:1.6 0.0003135 0.26 AML other m 2021-07-20T23:53:52.30
IV.HLNI.HHN. ML:0.8 0.00003585 0.96 AML other m 2021-07-20T23:53:52.44
IV.HLNI.HHE. ML:0.9 0.00004265 1.72 AML other m 2021-07-20T23:53:52.10
IV.ESCV.HHN. ML:1.6 0.000374 0.58 AML other m 2021-07-20T23:53:53.49
IV.EPZF.HHN. ML:1.4 0.00016999999999999999 0.36 AML other m 2021-07-20T23:53:54.18
IV.EPZF.HHE. ML:1.5 0.00017299999999999998 1.56 AML other m 2021-07-20T23:53:54.10
IV.EPIT.HHN. ML:1.8 0.00033 1.54 AML other m 2021-07-20T23:53:55.99
IV.EPIT.HHE. ML:1.6 0.000251 1.12 AML other m 2021-07-20T23:53:57.82
IV.EMSG.HHE. ML:1.7 0.00030649999999999997 0.6 AML other m 2021-07-20T23:54:00.16
IV.EMSG.HHN. ML:1.8 0.0004360000000000001 0.44 AML other m 2021-07-20T23:54:00.22
IV.HAVL.HHN. ML:1.5 0.000055400000000000005 0.5 AML other m 2021-07-20T23:54:05.35
IV.HAVL.HHE. ML:1.5 0.00004795 0.22 AML other m 2021-07-20T23:54:06.87
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