Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 25-07-2021 and time 15:17:06 (Italy) in region 4 km N Pedara (CT)

A magnitude ML 1.6 earthquake occured in region: 4 km N Pedara (CT), on

  • 25-07-2021 13:17:06 (UTC)
  • 25-07-2021 15:17:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6560, 15.0610 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
Pedara CT 4 14102 14102
Trecastagni CT 5 10910 25012
Nicolosi CT 5 7463 32475
Viagrande CT 6 8563 41038
Zafferana Etnea CT 6 9517 50555
Aci Bonaccorsi CT 8 3524 54079
Santa Venerina CT 8 8592 62671
Aci Sant'Antonio CT 8 17984 80655
Tremestieri Etneo CT 9 20589 101244
Milo CT 9 1087 102331
Mascalucia CT 9 31958 134289
San Giovanni la Punta CT 9 23060 157349
Aci Catena CT 9 29851 187200
San Pietro Clarenza CT 10 7743 194943
Belpasso CT 10 28108 223051
Valverde CT 10 7840 230891
Gravina di Catania CT 11 25838 256729
Acireale CT 11 52622 309351
Sant'Agata li Battiati CT 11 9479 318830
Camporotondo Etneo CT 11 5023 323853
San Gregorio di Catania CT 11 11966 335819
Ragalna CT 11 3924 339743
Sant'Alfio CT 12 1582 341325
Aci Castello CT 13 18723 360048
Giarre CT 14 27659 387707
Riposto CT 15 14838 402545
Misterbianco CT 16 49410 451955
Santa Maria di Licodia CT 16 7641 459596
Paternò CT 16 48228 507824
Mascali CT 17 14282 522106
Biancavilla CT 17 24007 546113
Catania CT 17 314555 860668
Motta Sant'Anastasia CT 18 12116 872784
Piedimonte Etneo CT 20 3963 876747

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km W of Acireale (52622 inhabitants)
17 Km N of Catania (314555 inhabitants)
69 Km N of Siracusa (122291 inhabitants)
72 Km SW of Reggio di Calabria (183035 inhabitants)
74 Km SW of Messina (238439 inhabitants)
86 Km NE of Ragusa (73313 inhabitants)
90 Km E of Caltanissetta (63360 inhabitants)
91 Km NE of Vittoria (63339 inhabitants)
92 Km N of Modica (54633 inhabitants)
97 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 1.6 2021-07-25
13:17:06		 37.6557 15.0607 8 2021-12-29
11:12:16		 Bollettino Sismico Italiano INGV 93401921
Reviewed
Rev200 		ML 1.1 2021-07-25
13:17:06		 37.682 15.043 5 2021-12-10
16:08:56		 Sala Operativa INGV_OE (Catania) 93198431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-25 13:17:06 ± 0.13
Latitude 37.6557 ± 0.0054
Longitude 15.0607 ± 0.0057
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 93401921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 600
Semi-minor axis of confidence ellipse (meter) 124
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 146
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
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) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.34354
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 93198431
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-07-25 13:31:35

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 93401921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-10 16:08:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AIO.HHE. 2021-07-25T13:17:14.46 0.3 undecidable manual P 23 38.1285 50 0.14 70
IV.ECZM.HHN. 2021-07-25T13:17:13.52 0.6 undecidable manual S 301 16.0728 116 0.71 41
IV.ECHR.HHE. 2021-07-25T13:17:12.81 0.6 undecidable manual S 285 13.3755 120 0.83 40
IV.ECBD.HHN. 2021-07-25T13:17:12.38 0.6 undecidable manual S 9 13.9749 119 0.22 48
IV.EMCN.HHN. 2021-07-25T13:17:12.48 0.6 undecidable manual S 351 15.1737 117 -0.05 50
IV.EPDN.HHZ. 2021-07-25T13:17:12.05 0.6 undecidable manual S 343 12.7761 121 0.25 48
IV.EPZF.HHZ. 2021-07-25T13:17:12.15 0.3 undecidable manual P 316 25.8519 107 0.14 72
IV.ECPN.HHZ. 2021-07-25T13:17:11.56 0.6 undecidable manual S 326 11.7771 123 0.08 50
IV.ESVO.HHE. 2021-07-25T13:17:10.34 0.3 undecidable manual P 323 16.3725 115 0.1 73
IV.EMFO.HHE. 2021-07-25T13:17:10.71 0.6 undecidable manual S 16 9.2796 130 -0.08 50
IV.ECZM.HHN. 2021-07-25T13:17:10.17 0.3 undecidable manual P 301 16.0728 116 -0.01 75
IV.EVRN.HHZ. 2021-07-25T13:17:10.82 0.6 undecidable manual S 60 7.5813 136 0.46 46
IV.ENIC.HNZ. 2021-07-25T13:17:10.02 0.6 undecidable manual S 232 4.3956 151 0.33 48
IV.EMNR.HHZ. 2021-07-25T13:17:10.67 0.3 undecidable manual P 350 18.1707 113 0.12 73
IV.EMSG.HHZ. 2021-07-25T13:17:10.90 0.3 undecidable manual P 332 20.7681 110 -0.14 72
IV.EPIT.HHZ. 2021-07-25T13:17:10.62 0.1 undecidable manual P 359 17.2716 114 0.23 95
IV.EMPL.HHZ. 2021-07-25T13:17:10.43 0.6 undecidable manual S 288 8.3805 133 -0.13 49
IV.ESML.HHZ. 2021-07-25T13:17:10.32 0.1 undecidable manual P 255 16.4724 115 0.07 98
IV.ESLN.HHZ. 2021-07-25T13:17:10.34 0.6 undecidable manual S 299 8.6802 132 -0.29 48
IV.EMCN.HHN. 2021-07-25T13:17:09.76 0.1 undecidable manual P 351 15.1737 117 -0.26 95
IV.ECBD.HHN. 2021-07-25T13:17:09.61 0.3 undecidable manual P 9 13.9749 119 -0.2 72
IV.EVRN.HHZ. 2021-07-25T13:17:09.03 0.1 undecidable manual P 60 7.5813 136 0.26 96
IV.EPDN.HHZ. 2021-07-25T13:17:09.51 0.1 undecidable manual P 343 12.7761 121 -0.09 99
IV.ECHR.HHE. 2021-07-25T13:17:09.81 0.3 undecidable manual P 285 13.3755 120 0.1 74
IV.ECPN.HHZ. 2021-07-25T13:17:09.20 0.3 undecidable manual P 326 11.7771 123 -0.22 72
IV.ESPC.HHN. 2021-07-25T13:17:09.57 0.6 undecidable manual S 324 4.995 147 -0.24 48
IV.ESPC.HHN. 2021-07-25T13:17:08.22 0.1 undecidable manual P 324 4.995 147 -0.23 97
IV.ESLN.HHZ. 2021-07-25T13:17:08.62 0.1 undecidable manual P 299 8.6802 132 -0.31 95
IV.EMFS.HHZ. 2021-07-25T13:17:08.65 0.6 undecidable manual P 322 8.9799 131 -0.33 47
IV.ENIC.HNZ. 2021-07-25T13:17:08.29 0.1 undecidable manual P 232 4.3956 151 -0.09 100
IV.EMPL.HHZ. 2021-07-25T13:17:08.73 0.1 undecidable manual P 288 8.3805 133 -0.15 98
IV.EMFO.HHE. 2021-07-25T13:17:08.74 0.3 undecidable manual P 16 9.2796 130 -0.28 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMPL.HHE. ML:1.8 0.001094 1.04 AML other m 2021-07-25T13:17:12.80
IV.EVRN.HNN. ML:1.8 0.001135 0.14 AML other m 2021-07-25T13:17:12.46
IV.EVRN.HHN. ML:1.7 0.0009215 0.12 AML other m 2021-07-25T13:17:12.47
IV.EVRN.HHE. ML:1.7 0.0008175 0.18 AML other m 2021-07-25T13:17:12.54
IV.EVRN.HNE. ML:1.6 0.0006765 0.46 AML other m 2021-07-25T13:17:13.37
IV.EMPL.HHN. ML:2.0 0.00181 1.16 AML other m 2021-07-25T13:17:13.29
IV.ESML.HNE. ML:1.5 0.00031 0.74 AML other m 2021-07-25T13:17:14.74
IV.ESML.HHE. ML:1.4 0.000248 1.58 AML other m 2021-07-25T13:17:15.95
IV.ESML.HHN. ML:1.4 0.00025 1.4 AML other m 2021-07-25T13:17:17.99
IV.ESML.HNN. ML:1.4 0.00025 0.6 AML other m 2021-07-25T13:17:18.00
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