Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 25-08-2012 and time 10:48:20 (Italy) in region 3 km NW Acate (RG)

A magnitude ML 1.5 earthquake occured in region: 3 km NW Acate (RG), on

  • 25-08-2012 08:48:20 (UTC)
  • 25-08-2012 10:48:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.0540, 14.4800 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.

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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
Acate RG 3 10954 10954
Mazzarrone CT 8 4078 15032
Vittoria RG 13 63339 78371
Niscemi CL 13 27558 105929
Comiso RG 16 30156 136085
Chiaramonte Gulfi RG 20 8238 144323

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NW of Vittoria (63339 inhabitants)
20 Km E of Gela (75827 inhabitants)
26 Km NW of Ragusa (73313 inhabitants)
33 Km NW of Modica (54633 inhabitants)
61 Km SE of Caltanissetta (63360 inhabitants)
72 Km W of Siracusa (122291 inhabitants)
74 Km SW of Catania (314555 inhabitants)
84 Km E of Agrigento (59770 inhabitants)
87 Km SW of Acireale (52622 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 1.5 2012-08-25
08:48:20		 37.0553 14.4898 10 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 2067641
Bulletin
Rev1000 		ML 1.5 2012-08-25
08:48:20		 37.0537 14.4802 11 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV 3077041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-08-25 08:48:20 ± 0.22
Latitude 37.0537 ± 0.0072
Longitude 14.4802 ± 0.0135
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 3077041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1172
Semi-minor axis of confidence ellipse (meter) 752
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 278
Circular confidence region, given by single value of horizontal uncertainty (meter) 1170.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 296
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.22483
Epicentral distance of station farthest from the epicenter (degree) 0.52071
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 5
Type of magnitude ML
Reference to an origin 3077041
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:45:18

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 2067641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2012-08-25 08:57:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2012-08-25T08:48:38.02 0.6 undecidable manual S 77 53.8017 50 0.44 44
IV.HAVL.HHZ. 2012-08-25T08:48:38.64 0.6 undecidable manual S 100 57.7977 50 -0.02 47
IV.HCRL.HHZ. 2012-08-25T08:48:37.93 0.6 undecidable manual S 62 55.1004 50 0 47
IV.HLNI.HHZ. 2012-08-25T08:48:35.78 0.6 undecidable manual S 47 47.619 50 -0.17 45
IV.HAVL.HHZ. 2012-08-25T08:48:31.15 0.1 undecidable manual P 100 57.7977 50 0.08 93
IV.HMDC.HHZ. 2012-08-25T08:48:30.64 0.6 undecidable manual S 111 28.8489 50 -0.28 48
IV.SSY.HHZ. 2012-08-25T08:48:30.62 0.1 undecidable manual P 77 53.8017 50 0.17 93
IV.HCRL.HHZ. 2012-08-25T08:48:30.55 0.3 undecidable manual P 62 55.1004 50 -0.1 69
IV.HLNI.HHZ. 2012-08-25T08:48:29.42 0.1 undecidable manual P 47 47.619 50 -0.09 93
IV.HVZN.HHZ. 2012-08-25T08:48:29.99 0.6 undecidable manual S 56 24.9528 50 0.09 50
IV.HMDC.HHZ. 2012-08-25T08:48:26.54 0.1 negative manual P 111 28.8489 50 -0.07 100
IV.HVZN.HHZ. 2012-08-25T08:48:26.25 0.1 undecidable manual P 56 24.9528 50 0.23 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHE. ML:1.4 0.0000493 0.12 AML other m 2012-08-25T08:48:40.58
IV.HAVL.HHN. ML:1.5 0.00007055000000000001 0.14 AML other m 2012-08-25T08:48:41.69
IV.HCRL.HHE. ML:1.7 0.0001134 1.08 AML other m 2012-08-25T08:48:41.49
IV.HCRL.HHN. ML:1.6 0.0000951 0.78 AML other m 2012-08-25T08:48:39.03
IV.HLNI.HHN. ML:1.5 0.0000856 0.14 AML other m 2012-08-25T08:48:35.95
IV.HLNI.HHE. ML:1.4 0.0000724 0.28 AML other m 2012-08-25T08:48:36.06
IV.HMDC.HHE. ML:1.4 0.000134 0.24 AML other m 2012-08-25T08:48:31.01
IV.HMDC.HHN. ML:1.6 0.0001995 0.16 AML other m 2012-08-25T08:48:31.01
IV.SSY.HHE. ML:1.4 0.0000605 0.5 AML other m 2012-08-25T08:48:38.25
IV.SSY.HHN. ML:1.6 0.00010035 1.16 AML other m 2012-08-25T08:48:40.60
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