Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 20-03-2021 and time 18:19:38 (UTC) in region 2 km W Giarre (CT)

A magnitude ML 1.9 earthquake occured in region: 2 km W Giarre (CT), on

  • 20-03-2021 18:19:38 (UTC)
  • 20-03-2021 19:19:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7370, 15.1690 at 9 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
Giarre CT 2 27659 27659
Sant'Alfio CT 2 1582 29241
Riposto CT 3 14838 44079
Mascali CT 3 14282 58361
Milo CT 5 1087 59448
Santa Venerina CT 6 8592 68040
Zafferana Etnea CT 7 9517 77557
Fiumefreddo di Sicilia CT 7 9623 87180
Piedimonte Etneo CT 8 3963 91143
Calatabiano CT 11 5308 96451
Linguaglossa CT 12 5403 101854
Acireale CT 14 52622 154476
Gaggi ME 15 3184 157660
Aci Sant'Antonio CT 15 17984 175644
Aci Catena CT 15 29851 205495
Giardini-Naxos ME 15 9415 214910
Viagrande CT 15 8563 223473
Trecastagni CT 15 10910 234383
Aci Bonaccorsi CT 16 3524 237907
Taormina ME 16 10960 248867
Pedara CT 16 14102 262969
Castelmola ME 17 1088 264057
Castiglione di Sicilia CT 17 3215 267272
Motta Camastra ME 18 845 268117
Valverde CT 18 7840 275957
Graniti ME 18 1492 277449
Nicolosi CT 18 7463 284912
Francavilla di Sicilia ME 19 3945 288857
San Giovanni la Punta CT 19 23060 311917
Tremestieri Etneo CT 20 20589 332506
San Gregorio di Catania CT 20 11966 344472
Aci Castello CT 20 18723 363195

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km N of Acireale (52622 inhabitants)
27 Km N of Catania (314555 inhabitants)
59 Km SW of Reggio di Calabria (183035 inhabitants)
61 Km SW of Messina (238439 inhabitants)
76 Km N of Siracusa (122291 inhabitants)
98 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 2021-03-20
18:19:38		 37.7367 15.1693 9 2021-07-12
16:55:04		 Bollettino Sismico Italiano INGV 88585431
Reviewed
Rev200 		ML 1.5 2021-03-20
18:19:37		 37.73 15.158 7 2021-06-17
11:20:22		 Sala Operativa INGV_OE (Catania) 88322841
Reviewed
Rev100 		ML 2.4 2021-03-20
18:19:34		 37.6482 15.307 34 2021-03-20
18:34:59		 Sala Sismica INGV-Roma 88322831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-20 18:19:38 ± 0.2
Latitude 37.7367 ± 0.0072
Longitude 15.1693 ± 0.0102
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88585431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 915
Semi-minor axis of confidence ellipse (meter) 370
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 130
Circular confidence region, given by single value of horizontal uncertainty (meter) 910.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38491
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 88585431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-17 11:19:53

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 88322841
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-03-20 18:35:36

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 88322831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-20 18:34:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOCL.EHZ. 2021-03-20T18:21:09.54 3.0 undecidable manual P -9.99 0
IV.PTRJ.HNZ. 2021-03-20T18:21:04.48 3.0 undecidable manual Sn -1.04 0
AC.VLO.HHZ. 2021-03-20T18:20:58.93 3.0 undecidable manual Sn -1.62 0
IV.FIAM.HHZ. 2021-03-20T18:20:38.29 3.0 undecidable manual P -9.99 0
IT.PLTA.HNZ. 2021-03-20T18:20:33.69 3.0 undecidable manual P -8.84 0
IV.AIO.HHZ. 2021-03-20T18:19:48.18 0.6 undecidable manual S 12 26.6511 108 0.02 49
IV.MUCR.HHZ. 2021-03-20T18:19:47.25 0.6 undecidable manual P 323 42.7239 50 0.53 43
IV.EMNR.HHE. 2021-03-20T18:19:45.10 0.6 undecidable manual S 305 15.3735 120 0.52 45
IV.EPIT.HHZ. 2021-03-20T18:19:44.25 0.6 undecidable manual S 310 12.876 124 0.4 47
IV.EMCN.HHE. 2021-03-20T18:19:44.30 0.6 undecidable manual S 297 13.3755 123 0.31 47
IV.EFIU.HHE. 2021-03-20T18:19:43.14 0.6 undecidable manual S 31 6.8931 142 0.83 40
IV.AIO.HHZ. 2021-03-20T18:19:43.88 0.6 undecidable manual P 12 26.6511 108 -0.16 48
IV.ESPC.HHE. 2021-03-20T18:19:43.92 0.6 undecidable manual S 249 13.3755 123 -0.07 50
IV.ECZM.HHN. 2021-03-20T18:19:43.46 1.0 undecidable manual P 269 23.2545 111 0.04 25
IV.EMSG.HHZ. 2021-03-20T18:19:43.21 0.3 undecidable manual P 296 21.3675 112 0.15 73
IV.EMPL.HHZ. 2021-03-20T18:19:43.53 0.3 undecidable manual P 250 18.5703 115 0.98 56
IV.ECBD.HHE. 2021-03-20T18:19:42.50 0.6 undecidable manual S 304 8.6802 135 -0.23 49
IV.EMFO.HHE. 2021-03-20T18:19:42.20 0.3 undecidable manual S 269 6.993 142 -0.12 75
IV.EVRN.HHZ. 2021-03-20T18:19:42.96 0.6 undecidable manual S 209 6.0939 146 0.82 41
IV.EMNR.HHE. 2021-03-20T18:19:42.11 0.1 undecidable manual P 305 15.3735 120 0.13 98
IV.ESPC.HHE. 2021-03-20T18:19:41.44 0.1 undecidable manual P 249 13.3755 123 -0.2 97
IV.ESLN.HHZ. 2021-03-20T18:19:41.96 0.6 undecidable manual P 254 17.7711 116 -0.44 46
IV.ECTS.HHE. 2021-03-20T18:19:41.83 0.3 undecidable manual P 345 16.6722 118 -0.38 70
IV.EMCN.HHE. 2021-03-20T18:19:41.54 0.1 undecidable manual P 297 13.3755 123 -0.1 99
IV.EMFS.HHE. 2021-03-20T18:19:41.70 0.3 undecidable manual P 263 15.1737 120 -0.24 72
IV.ESAL.HHZ. 2021-03-20T18:19:41.60 0.3 undecidable manual S 304 3.6963 157 -0.14 75
IV.EPIT.HHZ. 2021-03-20T18:19:41.49 0.1 undecidable manual P 310 12.876 124 -0.07 100
IV.ECBD.HHE. 2021-03-20T18:19:40.59 0.1 undecidable manual P 304 8.6802 135 -0.32 96
IV.EVRN.HHZ. 2021-03-20T18:19:40.71 0.3 undecidable manual P 209 6.0939 146 0.14 75
IV.EMFO.HHE. 2021-03-20T18:19:40.39 0.1 undecidable manual P 269 6.993 142 -0.29 96
IV.EFIU.HHE. 2021-03-20T18:19:40.67 0.3 undecidable manual P 31 6.8931 142 0 77
IV.ESAL.HHZ. 2021-03-20T18:19:40.03 0.1 negative manual P 304 3.6963 157 -0.31 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EVRN.HNE. ML:1.8 0.001127 0.98 AML other m 2021-03-20T18:19:47.32
IV.EVRN.HHN. ML:1.9 0.0014750000000000002 1.06 AML other m 2021-03-20T18:19:47.81
IV.EVRN.HNN. ML:1.9 0.0015699999999999998 0.96 AML other m 2021-03-20T18:19:49.49
IV.EPIT.HHE. ML:2.1 0.0014199999999999998 0.3 AML other m 2021-03-20T18:19:49.18
IV.EPIT.HHN. ML:2.2 0.00166 1.2 AML other m 2021-03-20T18:19:49.14
IV.EVRN.HHE. ML:1.9 0.0014199999999999998 0.16 AML other m 2021-03-20T18:19:49.50
IV.EMSG.HHN. ML:1.7 0.00035288345 0.4096 AML other m 2021-03-20T18:19:57.28
IV.EMSG.HHE. ML:1.6 0.000302564 0.976 AML other m 2021-03-20T18:19:57.19
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