Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 27-05-2011 and time 08:08:42 (Italy) in region 4 km NE Palagonia (CT)

A magnitude ML 2.1 earthquake occured in region: 4 km NE Palagonia (CT), on

  • 27-05-2011 06:08:42 (UTC)
  • 27-05-2011 08:08:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.3550, 14.7760 at 18 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
Palagonia CT 4 16608 16608
Ramacca CT 8 10894 27502
Scordia CT 9 17095 44597
Militello in Val di Catania CT 9 7443 52040
Mineo CT 12 5159 57199
Francofonte SR 17 12800 69999
Castel di Iudica CT 19 4625 74624
Grammichele CT 20 13418 88042

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SW of Catania (314555 inhabitants)
45 Km SW of Acireale (52622 inhabitants)
48 Km N of Ragusa (73313 inhabitants)
50 Km NE of Vittoria (63339 inhabitants)
55 Km N of Modica (54633 inhabitants)
56 Km NW of Siracusa (122291 inhabitants)
57 Km NE of Gela (75827 inhabitants)
65 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 		Md 2.0
ML 2.1 		2011-05-27
06:08:42		 37.355 14.776 18 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1222799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-05-27 06:08:42 ± 0.2
Latitude 37.3550 ± 0.0099
Longitude 14.7760 ± 0.0124
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1222799

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1093
Semi-minor axis of confidence ellipse (meter) 636
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 178
Circular confidence region, given by single value of horizontal uncertainty (meter) 1555.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.49
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.69248
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1222799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:59:36

Md:2.0

Field Value
Value 2.0
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 1222799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:59:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHN. 2011-05-27T06:09:00.01 0.3 undecidable manual Sg 145 53.4021 0.278 70
IV.CAGR.HHN. 2011-05-27T06:08:59.18 10.0 undecidable manual Pg 0 0 0
IV.HMDC.HHN. 2011-05-27T06:08:57.29 0.3 undecidable manual Sg 179 43.9227 0.059 74
IV.RAFF.HHZ. 2011-05-27T06:08:57.28 0.3 undecidable manual Sg 248 39.3273 1.235 47
IV.MMME.HHE. 2011-05-27T06:08:56.34 0.3 undecidable manual Pg 33 76.8675 0.169 68
IV.SSY.HHZ. 2011-05-27T06:08:55.42 0.3 undecidable manual Sg 130 34.1436 0.693 64
IV.HAGA.HHZ. 2011-05-27T06:08:54.87 0.3 undecidable manual Sg 103 34.3434 0.106 75
IV.HAVL.HHN. 2011-05-27T06:08:52.27 0.1 undecidable manual Pg 145 53.4021 -0.325 91
IV.HCRL.HHZ. 2011-05-27T06:08:52.69 0.1 undecidable manual Sg 109 23.9538 0.483 94
IV.HVZN.HHZ. 2011-05-27T06:08:51.38 0.3 undecidable manual Sg 195 20.2686 0.033 77
IV.RAFF.HHZ. 2011-05-27T06:08:50.30 0.1 positive manual Pg 248 39.3273 -0.165 98
IV.HMDC.HHN. 2011-05-27T06:08:50.58 0.1 undecidable manual Pg 179 43.9227 -0.57 87
IV.SSY.HHZ. 2011-05-27T06:08:49.66 0.1 negative manual Pg 130 34.1436 -0.045 100
IV.ECNV.HHZ. 2011-05-27T06:08:49.15 0.3 undecidable manual Pg 348 27.3504 0.439 70
IV.HAGA.HHZ. 2011-05-27T06:08:49.48 0.1 negative manual Pg 103 34.3434 -0.245 96
IV.HCRL.HHZ. 2011-05-27T06:08:48.05 0.1 negative manual Pg 109 23.9538 -0.199 99
IV.GALF.HHZ. 2011-05-27T06:08:48.95 10.0 undecidable manual Pg 0 0 0
IV.HLNI.HHN. 2011-05-27T06:08:48.95 0.3 undecidable manual Sg 95 8.4804 -0.214 76
IV.HVZN.HHZ. 2011-05-27T06:08:47.41 0.1 undecidable manual Pg 195 20.2686 -0.344 97
IV.POFI.HHE. 2011-05-27T06:08:47.27 10.0 undecidable manual Pg 0 0 0
IV.HLNI.HHN. 2011-05-27T06:08:46.20 0.1 negative manual Pg 95 8.4804 -0.293 100
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