Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 20-07-2011 and time 23:19:34 (UTC) in region Isole Eolie (Messina)

A magnitude ML 2.4 earthquake occured in region: Isole Eolie (Messina), on

  • 20-07-2011 23:19:34 (UTC)
  • 21-07-2011 01:19:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.3650, 15.0280 at 7 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
Lipari ME 13 12753 12753

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km W of Messina (238439 inhabitants)
61 Km W of Reggio di Calabria (183035 inhabitants)
85 Km N of Acireale (52622 inhabitants)
96 Km N of Catania (314555 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 1.9
ML 2.4 		2011-07-20
23:19:34		 38.365 15.028 7 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1262169
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-07-20 23:19:34 ± 0.11
Latitude 38.3650 ± 0.0054
Longitude 15.0280 ± 0.0103
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1262169

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 851
Semi-minor axis of confidence ellipse (meter) 592
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 1081.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.46495
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 1262169
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 00:53:26

Md:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 1262169
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 00:53:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMME.HHE. 2011-07-20T23:19:51.59 0.3 undecidable manual Sg 157 51.6039 0.146 70
IV.MUCR.HHN. 2011-07-20T23:19:48.06 0.6 undecidable manual Sg 201 38.2284 0.388 45
IV.MSRU.HHZ. 2011-07-20T23:19:48.62 0.3 undecidable manual Sg 105 43.3233 -0.608 63
IV.MCSR.HHZ. 2011-07-20T23:19:47.69 0.3 undecidable manual Sg 152 37.7289 0.177 71
IV.NOV.HHE. 2011-07-20T23:19:47.59 0.3 undecidable manual Sg 166 38.628 -0.224 70
IV.MPNC.HHZ. 2011-07-20T23:19:47.73 0.6 undecidable manual Sg 131 37.2294 0.367 46
IV.MMME.HHE. 2011-07-20T23:19:44.37 0.3 undecidable manual Pg 157 51.6039 0.198 69
IV.ATN.BHN. 2011-07-20T23:19:43.27 0.3 undecidable manual Pg 121 44.3223 0.222 70
IV.MCSR.HHZ. 2011-07-20T23:19:42.00 0.1 undecidable manual Pg 152 37.7289 0.103 96
IV.NOV.HHE. 2011-07-20T23:19:42.22 0.6 undecidable manual Pg 166 38.628 0.145 48
IV.MSRU.HHZ. 2011-07-20T23:19:42.70 0.1 undecidable manual Pg 105 43.3233 -0.183 94
IV.MPNC.HHZ. 2011-07-20T23:19:41.76 0.1 undecidable manual Pg 131 37.2294 -0.051 97
MN.AQU.HHZ. 2011-07-20T23:19:41.13 10.0 undecidable manual Pg 0 0 0
IV.MUCR.HHN. 2011-07-20T23:19:41.61 0.1 undecidable manual Pg 201 38.2284 -0.382 91
IV.ILLI.HHZ. 2011-07-20T23:19:39.26 0.3 undecidable manual Sg 322 11.2776 0.484 70
IV.MILZ.HHN. 2011-07-20T23:19:38.75 0.6 undecidable manual Pg 120 20.5683 0.203 49
IV.ILLI.HHZ. 2011-07-20T23:19:37.21 0.6 undecidable manual Pg 322 11.2776 0.359 48
IV.IVPL.HHZ. 2011-07-20T23:19:36.44 0.3 undecidable manual Sg 286 4.3956 -0.538 69
IV.IVPL.HHZ. 2011-07-20T23:19:35.62 0.1 undecidable manual Pg 286 4.3956 -0.197 100
BA.PZUN.HHZ. 2011-07-20T23:19:35.27 10.0 undecidable manual Pg 0 0 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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