Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 18-09-2011 and time 01:36:23 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 2.4 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 17-09-2011 23:36:23 (UTC)
  • 18-09-2011 01:36:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.0720, 15.3170 at 284 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

An earthquake occurred to
85 Km W of Cosenza (67546 inhabitants)
87 Km W of Lamezia Terme (70714 inhabitants)
100 Km N of Messina (238439 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 2.4 2011-09-17
23:36:23		 39.072 15.317 284 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1288549
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-09-17 23:36:23 ± 0.29
Latitude 39.0720 ± 0.0351
Longitude 15.3170 ± 0.0544
Depth (km) 284 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1288549

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 5842
Semi-minor axis of confidence ellipse (meter) 775
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
Circular confidence region, given by single value of horizontal uncertainty (meter) 6107.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 2.31306
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 13
Magnitude information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1288549
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:30:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
.LADO.EHN. 2011-09-17T23:37:35.57 0.6 undecidable manual Sg 80 144.9438 0.662 36
IV.PIPA.HHZ. 2011-09-17T23:37:34.33 0.6 undecidable manual Sg 70 136.6632 0.238 42
IV.SALB.HHZ. 2011-09-17T23:37:33.14 0.6 undecidable manual Sg 44 125.4744 0.094 45
IV.SERS.HHZ. 2011-09-17T23:37:32.41 0.6 undecidable manual Sg 92 118.2927 -0.009 46
.MSCL.HHE. 2011-09-17T23:37:30.85 0.6 undecidable manual Sg 156 101.8203 -0.243 47
.MSRU.HHE. 2011-09-17T23:37:30.68 0.6 undecidable manual Sg 169 91.242 0.349 45
IV.ATN.BHZ. 2011-09-17T23:37:30.65 0.6 undecidable manual Sg 173 102.12 -0.463 44
.JOPP.HHN. 2011-09-17T23:37:29.24 0.6 undecidable manual Sg 136 71.2731 0.132 49
IV.CAR1.HHZ. 2011-09-17T23:37:29.00 0.6 undecidable manual Sg 75 79.5648 -0.581 44
IV.MMGO.SHZ. 2011-09-17T23:37:12.81 0.3 undecidable manual Pg 233 256.7541 0.001 33
IV.PIPA.HHZ. 2011-09-17T23:37:04.18 0.1 undecidable manual Pg 70 136.6632 0.046 89
.LADO.EHN. 2011-09-17T23:37:04.30 0.1 undecidable manual Pg 80 144.9438 -0.31 83
IV.SERS.HHZ. 2011-09-17T23:37:03.30 0.1 undecidable manual Pg 92 118.2927 0.13 90
IV.SALB.HHZ. 2011-09-17T23:37:03.73 0.1 undecidable manual Pg 44 125.4744 0.195 89
.MCSR.HHE. 2011-09-17T23:37:03.30 0.3 undecidable manual Pg 184 112.0989 0.43 65
.NOV.HHN. 2011-09-17T23:37:03.90 0.3 undecidable manual Pg 188 116.8941 0.796 56
IV.GMB.BHN. 2011-09-17T23:37:03.11 0.6 undecidable manual Pg 156 109.7124 0.352 44
IV.ATN.BHZ. 2011-09-17T23:37:02.01 0.3 undecidable manual Pg 173 102.12 -0.407 66
.MSCL.HHE. 2011-09-17T23:37:02.17 0.3 undecidable manual Pg 156 101.8203 -0.233 69
.MSRU.HHE. 2011-09-17T23:37:01.67 0.3 undecidable manual Pg 169 91.242 -0.292 69
.JOPP.HHN. 2011-09-17T23:37:01.14 0.1 undecidable manual Pg 136 71.2731 -0.118 100
IV.CAR1.HHZ. 2011-09-17T23:37:01.14 0.1 undecidable manual Pg 75 79.5648 -0.39 92
IV.HLNI.HHE. 2011-09-17T23:36:57.97 10.0 undecidable manual Pg 0 0 0
IV.STR3.BHE. 2011-09-17T23:36:53.34 10.0 undecidable manual Pg 0 0 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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