Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 28-06-2011 and time 22:01:44 (Italy) in region 3 km W Sperlinga (EN)

A magnitude ML 2.0 earthquake occured in region: 3 km W Sperlinga (EN), on

  • 28-06-2011 20:01:44 (UTC)
  • 28-06-2011 22:01:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7540, 14.3200 at 33 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
Sperlinga EN 3 805 805
Nicosia EN 7 13899 14704
Gangi PA 11 6811 21515
Leonforte EN 14 13439 34954
Castel di Lucio ME 15 1294 36248
Nissoria EN 16 3000 39248
Assoro EN 17 5191 44439
Cerami EN 18 2006 46445
Capizzi ME 18 3176 49621
Calascibetta EN 19 4528 54149
Geraci Siculo PA 19 1945 56094
Petralia Soprana PA 19 3360 59454
Bompietro PA 19 1401 60855
Alimena PA 19 2032 62887
Gagliano Castelferrato EN 20 3593 66480

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NE of Caltanissetta (63360 inhabitants)
73 Km W of Catania (314555 inhabitants)
76 Km W of Acireale (52622 inhabitants)
77 Km N of Gela (75827 inhabitants)
80 Km E of Bagheria (55387 inhabitants)
81 Km NE of Agrigento (59770 inhabitants)
92 Km N of Vittoria (63339 inhabitants)
93 Km E of Palermo (674435 inhabitants)
99 Km NW 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 		Md 2.2
ML 2.0 		2011-06-28
20:01:44		 37.754 14.32 33 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1248359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-06-28 20:01:44 ± 0.43
Latitude 37.7540 ± 0.0270
Longitude 14.3200 ± 0.0387
Depth (km) 33 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1248359

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3570
Semi-minor axis of confidence ellipse (meter) 2819
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 4534.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 275
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.01803
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 1248359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 00:34:22

Md:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1248359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 00:34:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHN. 2011-06-28T20:02:17.00 0.3 undecidable manual Sg 141 112.998 0.331 87
IV.AGST.EHE. 2011-06-28T20:02:13.11 0.6 undecidable manual Sg 124 97.0251 -0.12 63
IV.SSY.HHN. 2011-06-28T20:02:12.88 0.3 undecidable manual Sg 135 93.7395 0.371 89
IV.SBPO.HHE. 2011-06-28T20:02:09.23 10.0 undecidable manual Pg 0 0 0
IV.HLNI.HHE. 2011-06-28T20:02:05.21 0.3 undecidable manual Sg 133 66.1893 -0.335 95
IV.MUCR.HHE. 2011-06-28T20:02:03.30 0.6 undecidable manual Sg 56 58.0974 -0.256 65
IV.HAVL.HHN. 2011-06-28T20:02:02.84 0.3 undecidable manual Pg 141 112.998 -0.137 90
IV.AGST.EHE. 2011-06-28T20:02:00.06 0.3 undecidable manual Pg 124 97.0251 -0.933 72
IV.SSY.HHN. 2011-06-28T20:02:00.77 0.3 undecidable manual Pg 135 93.7395 0.193 94
IV.HLNI.HHE. 2011-06-28T20:01:56.39 0.3 undecidable manual Pg 133 66.1893 -0.168 98
IV.GALF.HHE. 2011-06-28T20:01:56.23 0.6 undecidable manual Sg 103 22.1556 0.322 70
IV.MUCR.HHE. 2011-06-28T20:01:55.99 0.3 undecidable manual Pg 56 58.0974 0.584 93
IV.CAGR.HHN. 2011-06-28T20:01:51.40 0.6 undecidable manual Pg 133 21.5673 0.46 68
IV.GALF.HHE. 2011-06-28T20:01:50.58 0.3 undecidable manual Pg 103 22.1556 -0.414 100
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