Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 20-12-2009 and time 11:28:32 (Italy) in region 9 km S Randazzo (CT)

A magnitude ML 2.4 earthquake occured in region: 9 km S Randazzo (CT), on

  • 20-12-2009 10:28:32 (UTC)
  • 20-12-2009 11:28:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.8010, 14.9690 at 30 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
Randazzo CT 9 10900 10900
Maletto CT 10 3920 14820
Bronte CT 12 19172 33992
Santa Domenica Vittoria ME 13 980 34972
Moio Alcantara ME 13 717 35689
Malvagna ME 15 733 36422
Roccella Valdemone ME 15 666 37088
Milo CT 16 1087 38175
Maniace CT 16 3765 41940
Linguaglossa CT 16 5403 47343
Castiglione di Sicilia CT 16 3215 50558
Zafferana Etnea CT 17 9517 60075
Sant'Alfio CT 17 1582 61657
Piedimonte Etneo CT 19 3963 65620
Francavilla di Sicilia ME 19 3945 69565
Ragalna CT 19 3924 73489
Adrano CT 19 36122 109611
Santa Venerina CT 20 8592 118203
Biancavilla CT 20 24007 142210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Acireale (52622 inhabitants)
35 Km N of Catania (314555 inhabitants)
68 Km SW of Messina (238439 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
87 Km NW of Siracusa (122291 inhabitants)
100 Km N 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 2.4 2009-12-20
10:28:32		 37.801 14.969 30 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1000829
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-12-20 10:28:32 ± 0.35
Latitude 37.8010 ± 0.0117
Longitude 14.9690 ± 0.0171
Depth (km) 30 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1000829

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1419
Semi-minor axis of confidence ellipse (meter) 683
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 115
Circular confidence region, given by single value of horizontal uncertainty (meter) 1984.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.10792
Epicentral distance of station farthest from the epicenter (degree) 0.65471
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 1000829
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 19:10:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HVZN.HHE. 2009-12-20T10:28:54.89 0.6 undecidable manual Sg 198 72.6717 -0.023 48
IV.SSY.HHN. 2009-12-20T10:28:54.93 0.3 undecidable manual Sg 173 71.9724 0.18 70
IV.AGST.EHE. 2009-12-20T10:28:53.21 0.3 undecidable manual Sg 159 64.5909 0.344 69
IV.HCRL.HHN. 2009-12-20T10:28:51.07 0.3 undecidable manual Sg 174 57.7977 -0.099 73
IV.GALF.HHZ. 2009-12-20T10:28:46.28 0.6 undecidable manual Sg 254 36.741 0.092 51
IV.ECNV.HHE. 2009-12-20T10:28:45.41 0.6 undecidable manual Sg 225 32.0457 0.221 50
IV.SSY.HHN. 2009-12-20T10:28:45.02 0.3 undecidable manual Pg 173 71.9724 -0.244 69
IV.HVZN.HHE. 2009-12-20T10:28:45.86 0.3 undecidable manual Pg 198 72.6717 0.501 65
IV.MMME.HHZ. 2009-12-20T10:28:45.38 0.6 undecidable manual Sg 59 29.0487 0.816 42
IV.AGST.EHE. 2009-12-20T10:28:43.90 0.1 undecidable manual Pg 159 64.5909 -0.278 92
IV.HCRL.HHN. 2009-12-20T10:28:42.80 0.3 undecidable manual Pg 174 57.7977 -0.396 68
IV.ESLN.HHE. 2009-12-20T10:28:41.06 0.6 undecidable manual Sg 178 11.9769 -0.769 43
IV.GALF.HHZ. 2009-12-20T10:28:40.00 0.1 undecidable manual Pg 254 36.741 -0.321 96
IV.ECNV.HHE. 2009-12-20T10:28:40.29 0.3 undecidable manual Pg 225 32.0457 0.546 69
IV.MMME.HHZ. 2009-12-20T10:28:39.60 0.1 undecidable manual Pg 59 29.0487 0.219 100
IV.ESLN.HHE. 2009-12-20T10:28:37.40 0.1 undecidable manual Pg 178 11.9769 -0.404 99
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