Earthquake with magnitude of ML 2.0 on date 28-09-2020 and time 10:31:39 (Italy) in region 1 km SW Sant'Alfio (CT)

A magnitude ML 2.0 earthquake occured in region: 1 km SW Sant'Alfio (CT), on

  • 28-09-2020 08:31:39 (UTC)
  • 28-09-2020 10:31:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.737, 15.135 at 11 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sant'Alfio CT 1 1582 1582
Milo CT 2 1087 2669
Giarre CT 5 27659 30328
Zafferana Etnea CT 5 9517 39845
Santa Venerina CT 6 8592 48437
Mascali CT 6 14282 62719
Riposto CT 6 14838 77557
Piedimonte Etneo CT 9 3963 81520
Fiumefreddo di Sicilia CT 9 9623 91143
Linguaglossa CT 12 5403 96546
Calatabiano CT 13 5308 101854
Trecastagni CT 14 10910 112764
Acireale CT 14 52622 165386
Viagrande CT 14 8563 173949
Aci Sant'Antonio CT 15 17984 191933
Pedara CT 15 14102 206035
Aci Catena CT 15 29851 235886
Aci Bonaccorsi CT 16 3524 239410
Gaggi ME 16 3184 242594
Castiglione di Sicilia CT 16 3215 245809
Nicolosi CT 17 7463 253272
Giardini-Naxos ME 17 9415 262687
Valverde CT 18 7840 270527
San Giovanni la Punta CT 18 23060 293587
Motta Camastra ME 18 845 294432
Taormina ME 18 10960 305392
Francavilla di Sicilia ME 18 3945 309337
Castelmola ME 19 1088 310425
Tremestieri Etneo CT 19 20589 331014
Graniti ME 19 1492 332506
San Gregorio di Catania CT 19 11966 344472
Mascalucia CT 20 31958 376430
Moio Alcantara ME 20 717 377147
Aci Castello CT 20 18723 395870

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km N of Acireale (52622 inhabitants)
26 Km N of Catania (314555 inhabitants)
61 Km SW of Reggio di Calabria (183035 inhabitants)
63 Km SW of Messina (238439 inhabitants)
77 Km N of Siracusa (122291 inhabitants)
97 Km NE of Ragusa (73313 inhabitants)
98 Km E of Caltanissetta (63360 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 2.0 2020-09-28
08:31:39
37.7373 15.1348 11 2021-02-26
14:56:11
Bollettino Sismico Italiano INGV 85630281
Reviewed
Rev200
ML 1.3 2020-09-28
08:31:39
37.755 15.131 3 2020-12-22
15:40:40
Sala Operativa INGV_OE (Catania) 83327091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-28 08:31:39 ± 0.13
Latitude 37.7373 ± 0.0117
Longitude 15.1348 ± 0.0136
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85630281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1450
Semi-minor axis of confidence ellipse (meter) 1020
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 1450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.16817
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 85630281
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-22 15:40:22

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 83327091
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-09-28 08:37:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EMCN.HHZ. 2020-09-28T08:31:45.09 0.6 undecidable manual S 304 0.0962 116 0.21 48
IV.EPIT.HHZ. 2020-09-28T08:31:45.36 0.6 undecidable manual S 320 0.0962 116 0.48 45
IV.EFIU.HHE. 2020-09-28T08:31:45.08 0.6 undecidable manual S 49 0.0791 126 0.63 43
IV.EVRN.HHZ. 2020-09-28T08:31:44.02 0.6 undecidable manual S 179 0.0477 146 0.22 49
IV.EMSG.HHZ. 2020-09-28T08:31:44.39 0.3 undecidable manual P 300 0.1682 90 0.56 66
IV.ECBD.HHZ. 2020-09-28T08:31:43.68 0.6 undecidable manual S 318 0.0576 140 -0.29 48
IV.ECTS.HHZ. 2020-09-28T08:31:43.11 0.3 undecidable manual P 356 0.1448 90 -0.32 71
IV.EPIT.HHZ. 2020-09-28T08:31:42.48 0.1 undecidable manual P 320 0.0962 116 -0.14 98
IV.EFIU.HHE. 2020-09-28T08:31:42.04 0.1 undecidable manual P 49 0.0791 126 -0.33 95
IV.EMCN.HHZ. 2020-09-28T08:31:42.57 0.1 undecidable manual P 304 0.0962 116 -0.05 100
IV.EPOZ.HHZ. 2020-09-28T08:31:42.69 0.1 undecidable manual P 147 0.0782 127 0.34 96
IV.EVRN.HHZ. 2020-09-28T08:31:41.85 0.3 undecidable manual P 179 0.0477 146 -0.15 73
IV.ECBD.HHZ. 2020-09-28T08:31:41.65 0.1 undecidable manual P 318 0.0576 140 -0.44 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EVRN.HNN. ML:2.1 0.0017862735 0.192 AML other m 2020-09-28T08:31:46.65
IV.EVRN.HNE. ML:1.9 0.001344267 0.3392 AML other m 2020-09-28T08:31:44.11
IV.EVRN.HHE. ML:2 0.001570916 0.256 AML other m 2020-09-28T08:31:47.49
IV.EVRN.HHN. ML:2 0.001568869 0.1792 AML other m 2020-09-28T08:31:46.75
IV.EMCN.HHN. ML:2 0.00121799565 0.2432 AML other m 2020-09-28T08:31:47.24
IV.EMCN.HNE. ML:2.2 0.0018371155 0.4864 AML other m 2020-09-28T08:31:49.26
IV.EMCN.HHE. ML:2.2 0.0019137585 0.48 AML other m 2020-09-28T08:31:49.02
IV.EMCN.HNN. ML:2.1 0.001554058 0.5248 AML other m 2020-09-28T08:31:48.84
IV.EPOZ.HHE. ML:1.3 0.00024653375 0.1216 AML other m 2020-09-28T08:31:45.96
IV.EPOZ.HHN. ML:1.3 0.0002722658 0.2624 AML other m 2020-09-28T08:31:46.10
IV.EMSG.HHN. ML:1.9 0.0005806828 0.5376 AML other m 2020-09-28T08:31:52.15
IV.EMSG.HHE. ML:1.9 0.00061371245 0.3968 AML other m 2020-09-28T08:31:49.21
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