Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 4.0 on date 26-10-2011 and time 09:15:49 (Italy) in region Malta [Sea]

A magnitude ML 4.0 earthquake occured in region: Malta [Sea], on

  • 26-10-2011 07:15:49 (UTC)
  • 26-10-2011 09:15:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 34.8480, 13.9070 at 21 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 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 		ML 4.0 2011-10-26
07:15:49		 34.848 13.907 21 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1301079
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-10-26 07:15:49 ± 0.3
Latitude 34.8480 ± 0.0243
Longitude 13.9070 ± 0.0351
Depth (km) 21 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1301079

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3810
Semi-minor axis of confidence ellipse (meter) 1560
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 4186.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 318
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 3.25644
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 18
Magnitude information

ML:4.0

Field Value
Value 4.0
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1301079
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:48:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2011-10-26T07:17:02.09 0.1 undecidable manual Sg 17 290.5869 0.027 36
IV.SSY.HHZ. 2011-10-26T07:16:59.06 0.1 undecidable manual Sg 22 276.8118 -0.034 42
IV.HVZN.HHZ. 2011-10-26T07:16:57.09 0.1 undecidable manual Sg 15 268.5312 -0.217 44
IV.MEU.SHZ. 2011-10-26T07:16:56.81 0.1 undecidable manual Sg 18 264.4353 0.392 44
IV.HAVL.HHN. 2011-10-26T07:16:55.73 0.1 undecidable manual Sg 25 258.4413 0.591 44
IV.HMDC.HHZ. 2011-10-26T07:16:52.19 0.1 undecidable manual Sg 18 247.0638 -0.497 50
IV.ECNV.HHE. 2011-10-26T07:16:43.84 10.0 undecidable manual Pg 0 0 0
IV.PLLN.SHN. 2011-10-26T07:16:39.45 0.1 undecidable manual Pn 3 349.4835 0.729 25
IV.GIB.HHZ. 2011-10-26T07:16:39.17 0.1 undecidable manual Pn 2 348.7842 0.543 27
IV.SOLUN.HHN. 2011-10-26T07:16:39.89 0.6 undecidable manual Pn 355 361.4604 -0.315 14
IV.GALF.HHZ. 2011-10-26T07:16:36.38 0.6 undecidable manual Pn 10 323.0322 0.957 12
IV.CRJA.SHZ. 2011-10-26T07:16:36.76 0.1 undecidable manual Pn 346 337.5066 -0.465 28
IV.ALJA.HHN. 2011-10-26T07:16:35.30 0.1 undecidable manual Pn 358 322.1331 -0.014 32
IV.MMGO.SHZ. 2011-10-26T07:16:35.30 0.1 undecidable manual Pn 345 323.1321 -0.134 31
MN.CLTB.HHE. 2011-10-26T07:16:34.39 0.6 undecidable manual Pn 349 309.1572 0.694 13
IV.HAGA.HHZ. 2011-10-26T07:16:31.35 0.3 undecidable manual Pn 22 292.5849 -0.29 25
IV.HCRL.HHN. 2011-10-26T07:16:31.25 0.1 undecidable manual Pn 20 288.3891 0.136 36
IV.AGST.EHZ. 2011-10-26T07:16:31.46 0.1 undecidable manual Pn 24 292.2852 -0.135 35
IV.HLNI.HHZ. 2011-10-26T07:16:30.88 0.1 undecidable manual Pn 17 290.5869 -0.506 33
IV.SSY.HHZ. 2011-10-26T07:16:29.98 0.1 undecidable manual Pn 22 276.8118 0.307 40
IV.PTMD.HHZ. 2011-10-26T07:16:28.54 10.0 undecidable manual Sg 0 0 0
IV.HVZN.HHZ. 2011-10-26T07:16:28.71 0.1 undecidable manual Pn 15 268.5312 0.07 45
IV.HAVL.HHN. 2011-10-26T07:16:27.17 0.1 undecidable manual Pn 25 258.4413 -0.22 48
IV.MEU.SHZ. 2011-10-26T07:16:27.98 0.1 undecidable manual Pn 18 264.4353 -0.148 46
IV.HMDC.HHZ. 2011-10-26T07:16:25.57 0.1 undecidable manual Pn 18 247.0638 -0.403 51
MN.WDD.HHZ. 2011-10-26T07:16:24.79 0.3 undecidable manual Sg 27 123.1878 -0.138 75
IV.PTMD.HHZ. 2011-10-26T07:16:24.88 10.0 undecidable manual Pg 0 0 0
MN.WDD.HHZ. 2011-10-26T07:16:10.11 0.1 undecidable manual Pg 27 123.1878 0.163 100
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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