Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 25-01-2021 and time 04:17:32 (Italy) in region 1 km N Giarre (CT)

A magnitude ML 1.9 earthquake occured in region: 1 km N Giarre (CT), on

  • 25-01-2021 03:17:32 (UTC)
  • 25-01-2021 04:17:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7430, 15.1870 at 16 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
Giarre CT 1 27659 27659
Riposto CT 2 14838 42497
Mascali CT 2 14282 56779
Sant'Alfio CT 4 1582 58361
Fiumefreddo di Sicilia CT 6 9623 67984
Milo CT 7 1087 69071
Piedimonte Etneo CT 7 3963 73034
Santa Venerina CT 7 8592 81626
Zafferana Etnea CT 9 9517 91143
Calatabiano CT 10 5308 96451
Linguaglossa CT 12 5403 101854
Giardini-Naxos ME 14 9415 111269
Gaggi ME 14 3184 114453
Acireale CT 15 52622 167075
Taormina ME 15 10960 178035
Castelmola ME 15 1088 179123
Aci Catena CT 16 29851 208974
Aci Sant'Antonio CT 16 17984 226958
Castiglione di Sicilia CT 17 3215 230173
Viagrande CT 17 8563 238736
Trecastagni CT 17 10910 249646
Graniti ME 17 1492 251138
Motta Camastra ME 17 845 251983
Aci Bonaccorsi CT 17 3524 255507
Pedara CT 18 14102 269609
Francavilla di Sicilia ME 18 3945 273554
Letojanni ME 19 2861 276415
Valverde CT 19 7840 284255
Mongiuffi Melia ME 20 600 284855
Nicolosi CT 20 7463 292318
San Giovanni la Punta CT 20 23060 315378

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km N of Acireale (52622 inhabitants)
28 Km N of Catania (314555 inhabitants)
57 Km SW of Reggio di Calabria (183035 inhabitants)
60 Km SW of Messina (238439 inhabitants)
77 Km N of Siracusa (122291 inhabitants)
99 Km NE of Ragusa (73313 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 1.9 2021-01-25
03:17:32		 37.7433 15.1868 17 2021-07-12
16:55:01		 Bollettino Sismico Italiano INGV 87779321
Reviewed
Rev200 		ML 1.5 2021-01-25
03:17:33		 37.723 15.132 3 2021-03-05
14:13:36		 Sala Operativa INGV_OE (Catania) 86549561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-25 03:17:32 ± 0.23
Latitude 37.7433 ± 0.0108
Longitude 15.1868 ± 0.0182
Depth (km) 17 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87779321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1572
Semi-minor axis of confidence ellipse (meter) 1023
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
Circular confidence region, given by single value of horizontal uncertainty (meter) 1570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.04317
Epicentral distance of station farthest from the epicenter (degree) 0.65111
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 87779321
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-05 14:12:44

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 86549561
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-25 03:47:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HSRS.HHE. 2021-01-25T03:17:54.34 0.6 undecidable manual S 178 72.2721 95 0.46 42
IV.HSRS.HHE. 2021-01-25T03:17:44.91 0.6 undecidable manual P 178 72.2721 95 0.24 44
IV.SSY.HHZ. 2021-01-25T03:17:43.69 0.3 undecidable manual P 189 65.6898 96 0.02 70
IV.HLNI.HHZ. 2021-01-25T03:17:41.13 1.0 undecidable manual P 212 51.8037 98 -0.41 23
IV.AIO.HHZ. 2021-01-25T03:17:41.80 0.3 undecidable manual S 9 25.6521 111 0.14 75
IV.ESML.HHZ. 2021-01-25T03:17:38.65 1.0 undecidable manual P 243 30.3474 106 0.35 23
IV.EFIU.HHZ. 2021-01-25T03:17:38.33 0.3 undecidable manual S 22 5.4945 158 0.68 68
IV.AIO.HHZ. 2021-01-25T03:17:37.68 0.3 undecidable manual P 9 25.6521 111 0.07 76
IV.EMSG.HHZ. 2021-01-25T03:17:37.77 0.6 undecidable manual P 293 22.4553 115 0.6 44
IV.EVRN.HHZ. 2021-01-25T03:17:37.93 0.6 undecidable manual S 217 7.4814 151 0.05 52
IV.ENIC.HHZ. 2021-01-25T03:17:36.60 0.3 undecidable manual P 229 19.0698 120 -0.1 76
IV.ECTS.HHZ. 2021-01-25T03:17:36.13 0.3 undecidable manual P 339 16.4724 126 -0.23 74
IV.EMNR.HHZ. 2021-01-25T03:17:36.98 0.6 undecidable manual P 300 16.2726 126 0.64 44
IV.EPOZ.HHZ. 2021-01-25T03:17:35.41 0.3 undecidable manual P 179 7.881 149 -0.05 78
IV.EMFO.HHZ. 2021-01-25T03:17:35.00 0.3 undecidable manual P 264 8.4804 147 -0.51 71
IV.EPIT.HHZ. 2021-01-25T03:17:35.70 1.0 undecidable manual P 304 13.6752 132 -0.32 24
IV.EFIU.HHZ. 2021-01-25T03:17:35.06 0.1 undecidable manual P 22 5.4945 158 -0.24 100
IV.EVRN.HHZ. 2021-01-25T03:17:34.96 0.3 undecidable manual P 217 7.4814 151 -0.47 72
IV.ESAL.HHZ. 2021-01-25T03:17:34.90 0.6 undecidable manual P 286 4.7952 161 -0.36 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPOZ.HHE. ML:1.7 0.0004457763 0.12 AML other m 2021-01-25T03:17:39.51
IV.EPOZ.HHN. ML:1.7 0.00047898255 0.0992 AML other m 2021-01-25T03:17:39.64
IV.ENIC.HHE. ML:2.4 0.0015280545 0.2208 AML other m 2021-01-25T03:17:43.31
IV.ENIC.HNE. ML:2.4 0.0017917899999999997 0.2 AML other m 2021-01-25T03:17:43.32
IV.ENIC.HHN. ML:2.3 0.0013307575 0.2208 AML other m 2021-01-25T03:17:43.79
IV.ESML.HHE. ML:1.9 0.00031157995 0.2208 AML other m 2021-01-25T03:17:46.21
IV.AIO.HHE. ML:1.6 0.000177852485 0.24 AML other m 2021-01-25T03:17:47.24
IV.AIO.HHN. ML:1.8 0.00028828375 0.36 AML other m 2021-01-25T03:17:47.28
IV.ESML.HHN. ML:1.7 0.00020734935 0.36 AML other m 2021-01-25T03:17:48.39
IV.ENIC.HNN. ML:2.4 0.0015731427 0.3104 AML other m 2021-01-25T03:17:48.67
IV.HLNI.HHN. ML:1.4 0.000056138025 0.08 AML other m 2021-01-25T03:17:52.70
IV.HLNI.HHE. ML:1.3 0.00005220587 0.16 AML other m 2021-01-25T03:17:53.31
IV.SSY.HHN. ML:2.1 0.00023763397500000001 1.9008 AML other m 2021-01-25T03:17:56.04
IV.SSY.HHE. ML:1.9 0.00015002273999999998 0.1392 AML other m 2021-01-25T03:17:57.62
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