Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 30-08-2012 and time 17:14:09 (UTC) in region 4 km S Grammichele (CT)

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

  • 30-08-2012 17:14:09 (UTC)
  • 30-08-2012 19:14:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.1780, 14.6320 at 23 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
Grammichele CT 4 13418 13418
Licodia Eubea CT 7 3081 16499
Vizzini CT 11 6241 22740
Mineo CT 11 5159 27899
Mazzarrone CT 12 4078 31977
Caltagirone CT 13 38686 70663
Monterosso Almo RG 15 3032 73695
Chiaramonte Gulfi RG 17 8238 81933
Militello in Val di Catania CT 18 7443 89376
Palagonia CT 20 16608 105984

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km N of Vittoria (63339 inhabitants)
29 Km N of Ragusa (73313 inhabitants)
36 Km E of Gela (75827 inhabitants)
37 Km N of Modica (54633 inhabitants)
54 Km SW of Catania (314555 inhabitants)
60 Km W of Siracusa (122291 inhabitants)
61 Km SE of Caltanissetta (63360 inhabitants)
68 Km SW of Acireale (52622 inhabitants)
94 Km E of Agrigento (59770 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
Reviewed
Rev100 		ML 1.6 2012-08-30
17:14:09		 37.1762 14.6445 23 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 2093831
Bulletin
Rev1000 		ML 1.6 2012-08-30
17:14:09		 37.1777 14.6318 23 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV 3634321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-08-30 17:14:09 ± 0.12
Latitude 37.1777 ± 0.0036
Longitude 14.6318 ± 0.0056
Depth (km) 23 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 3634321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 363
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 257
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) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.06655
Epicentral distance of station farthest from the epicenter (degree) 0.44786
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:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 3634321
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:46:33

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 2093831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2012-08-30 17:19:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2012-08-30T17:14:25.05 0.1 undecidable manual S 75 47.7189 109 -0.13 91
IV.HAVL.HHZ. 2012-08-30T17:14:25.76 0.1 undecidable manual S 119 49.7169 108 0.09 91
IV.SSY.HHZ. 2012-08-30T17:14:23.21 0.3 undecidable manual S 93 39.1275 113 0.18 69
IV.HCRL.HHZ. 2012-08-30T17:14:22.57 0.3 undecidable manual S 72 37.2294 115 -0.01 71
IV.HLNI.HHZ. 2012-08-30T17:14:20.46 0.1 undecidable manual S 48 28.4493 122 -0.05 96
IV.HMDC.HHZ. 2012-08-30T17:14:20.18 0.1 undecidable manual S 151 27.6501 123 -0.16 95
IV.MEU.SHZ. 2012-08-30T17:14:18.59 0.1 undecidable manual S 113 18.9699 135 0.05 97
IV.HAGA.HHZ. 2012-08-30T17:14:18.32 0.1 undecidable manual P 75 47.7189 109 -0.21 89
IV.HAVL.HHZ. 2012-08-30T17:14:18.66 0.1 undecidable manual P 119 49.7169 108 -0.15 90
IV.HCRL.HHZ. 2012-08-30T17:14:17.01 0.1 undecidable manual P 72 37.2294 115 -0.02 95
IV.SSY.HHZ. 2012-08-30T17:14:17.36 0.1 undecidable manual P 93 39.1275 113 0.07 94
IV.HVZN.HHZ. 2012-08-30T17:14:16.80 0.1 undecidable manual S 89 7.3815 160 -0.06 100
IV.HMDC.HHZ. 2012-08-30T17:14:15.63 0.1 undecidable manual P 151 27.6501 123 -0.11 95
IV.HLNI.HHZ. 2012-08-30T17:14:15.94 0.1 undecidable manual P 48 28.4493 122 0.11 95
IV.MEU.SHZ. 2012-08-30T17:14:14.84 0.1 undecidable manual P 113 18.9699 135 0.14 95
IV.HVZN.HHZ. 2012-08-30T17:14:13.93 0.1 undecidable manual P 89 7.3815 160 0.2 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:1.8 0.00026000000000000003 0.14 AML other m 2012-08-30T17:14:20.63
IV.HLNI.HHN. ML:1.7 0.000202 0.1 AML other m 2012-08-30T17:14:20.71
IV.HVZN.HHE. ML:1.5 0.0002285 0.7 AML other m 2012-08-30T17:14:17.15
IV.HVZN.HHN. ML:1.4 0.000185 1.14 AML other m 2012-08-30T17:14:19.28
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