Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 21-02-2009 and time 18:22:59 (Italy) in region 1 km NE Borzonasca (GE)

A magnitude ML 2.4 earthquake occured in region: 1 km NE Borzonasca (GE), on

  • 21-02-2009 17:22:59 (UTC)
  • 21-02-2009 18:22:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.4300, 9.4040 at 4 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
Borzonasca GE 2 2049 2049
Mezzanego GE 6 1537 3586
Ne GE 9 2259 5845
San Colombano Certenoli GE 10 2683 8528
Carasco GE 10 3733 12261
Lorsica GE 10 468 12729
Orero GE 11 565 13294
Rezzoaglio GE 11 995 14289
Leivi GE 12 2442 16731
Coreglia Ligure GE 12 285 17016
Favale di Malvaro GE 12 466 17482
Cogorno GE 12 5676 23158
Cicagna GE 14 2502 25660
Santo Stefano d'Aveto GE 14 1126 26786
Chiavari GE 14 27398 54184
Lavagna GE 14 12791 66975
Maissana SP 15 616 67591
Zoagli GE 15 2472 70063
Moconesi GE 15 2614 72677
Fontanigorda GE 15 277 72954
Rapallo GE 16 29796 102750
Montebruno GE 16 240 102990
Varese Ligure SP 16 2059 105049
Tribogna GE 17 614 105663
Neirone GE 17 916 106579
Casarza Ligure GE 18 6826 113405
Sestri Levante GE 18 18578 131983
Santa Margherita Ligure GE 19 9338 141321
Tornolo PR 19 1010 142331
Uscio GE 19 2284 144615
Rovegno GE 19 554 145169
Castiglione Chiavarese GE 19 1616 146785
Bedonia PR 20 3482 150267

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Genova (586655 inhabitants)
49 Km NW of La Spezia (93959 inhabitants)
68 Km NW of Carrara (63133 inhabitants)
73 Km SW of Piacenza (102191 inhabitants)
73 Km NW of Massa (69479 inhabitants)
75 Km E of Savona (61345 inhabitants)
82 Km SE of Alessandria (93943 inhabitants)
84 Km W of Parma (192836 inhabitants)
86 Km S of Pavia (72576 inhabitants)
92 Km NW of Viareggio (62467 inhabitants)
92 Km SW of Cremona (71901 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 2.6
ML 2.4 		2009-02-21
17:22:59		 44.43 9.404 4 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 745559
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-02-21 17:22:59 ± 0.18
Latitude 44.4300 ± 0.0099
Longitude 9.4040 ± 0.0101
Depth (km) 4 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 745559

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 883
Semi-minor axis of confidence ellipse (meter) 877
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 45
Circular confidence region, given by single value of horizontal uncertainty (meter) 1360.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.59
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 2.26090
Number of stations at which the event was observed 44
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 745559
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:05:57

Md:2.6

Field Value
Value 2.6
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 745559
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:05:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMPR.HHN. 2009-02-21T17:24:04.15 10.0 undecidable manual Pg 0 0 0
MN.TUE.HHE. 2009-02-21T17:24:03.35 10.0 undecidable manual Pg 0 0 0
CH.MMK.HHN. 2009-02-21T17:24:02.14 10.0 undecidable manual Pg 0 0 0
IV.BULG.HHN. 2009-02-21T17:24:02.24 10.0 undecidable manual Pg 0 0 0
IV.MABI.HHZ. 2009-02-21T17:23:59.91 10.0 undecidable manual Sg 0 0 0
IV.ROVR.HHE. 2009-02-21T17:23:56.61 10.0 undecidable manual Pg 0 0 0
IV.MABI.HHZ. 2009-02-21T17:23:54.86 10.0 undecidable manual Pg 0 0 0
IV.MCEL.HHE. 2009-02-21T17:23:53.16 10.0 undecidable manual Pg 0 0 0
IV.ASQU.HHE. 2009-02-21T17:23:52.25 10.0 undecidable manual Pg 0 0 0
MN.CUC.HHN. 2009-02-21T17:23:51.59 10.0 undecidable manual Pg 0 0 0
IV.SCHR.EHZ. 2009-02-21T17:23:51.43 10.0 undecidable manual Pg 0 0 0
IV.SIRI.HHZ. 2009-02-21T17:23:49.29 10.0 undecidable manual Pg 0 0 0
IV.RAVA.EHN. 2009-02-21T17:23:48.91 10.0 undecidable manual Pg 0 0 0
GU.STV.HHN. 2009-02-21T17:23:47.25 10.0 undecidable manual Pg 0 0 0
IV.CTI.EHE. 2009-02-21T17:23:38.90 0.3 undecidable manual Pg 44 250.9599 0.033 32
IV.LAV9.SHZ. 2009-02-21T17:23:37.06 10.0 undecidable manual Pg 0 0 0
IV.VMG.SHZ. 2009-02-21T17:23:34.00 10.0 undecidable manual Pg 0 0 0
GU.PZZ.HHZ. 2009-02-21T17:23:31.36 0.6 undecidable manual Pg 273 181.2852 1.186 23
GU.TRAV.HHE. 2009-02-21T17:23:30.19 0.3 undecidable manual Pg 313 176.9895 0.687 43
IV.SEI.SHZ. 2009-02-21T17:23:29.86 10.0 undecidable manual Pg 0 0 0
GU.BHB.HHN. 2009-02-21T17:23:29.71 0.6 undecidable manual Pg 286 174.7917 0.536 31
IV.DOI.HHZ. 2009-02-21T17:23:29.36 0.6 undecidable manual Pg 273 170.9955 0.78 29
CH.MUGIO.HHZ. 2009-02-21T17:23:28.79 0.3 undecidable manual Pg 350 167.8098 0.691 45
IV.ZCCA.HHZ. 2009-02-21T17:23:28.10 10.0 undecidable manual Pg 0 0 0
GU.FINB.HHZ. 2009-02-21T17:23:27.84 0.6 undecidable manual Sg 252 90.1431 -0.144 43
IV.MDI.HHZ. 2009-02-21T17:23:26.64 0.3 undecidable manual Pg 9 150.5382 1.208 39
IV.MONC.HHZ. 2009-02-21T17:23:26.85 10.0 undecidable manual Pg 0 0 0
IV.QLNO.HHE. 2009-02-21T17:23:25.96 0.6 undecidable manual Sg 262 84.7485 -0.582 39
IV.FNVD.HHN. 2009-02-21T17:23:24.35 0.3 undecidable manual Pg 101 139.5603 0.616 52
IV.CRMI.HHN. 2009-02-21T17:23:24.40 0.3 undecidable manual Pg 119 143.5452 0.047 59
IV.IMI.HHN. 2009-02-21T17:23:22.43 0.6 undecidable manual Pg 245 133.3665 -0.348 38
GU.PCP.HHE. 2009-02-21T17:23:21.58 0.6 undecidable manual Sg 281 69.0753 -0.789 37
IV.PII.SHZ. 2009-02-21T17:23:20.34 0.6 undecidable manual Pg 131 118.992 -0.227 40
IV.GROG.HHZ. 2009-02-21T17:23:20.26 0.3 undecidable manual Pg 161 117.993 -0.158 61
IV.PZZT.HHE. 2009-02-21T17:23:20.72 0.3 undecidable manual Pg 105 120.3906 -0.071 62
GU.RORO.HHE. 2009-02-21T17:23:19.90 0.3 undecidable manual Pg 252 111.999 0.412 59
IV.BDI.HHN. 2009-02-21T17:23:17.68 0.3 undecidable manual Pg 113 103.2189 -0.458 59
GU.MAIM.HHZ. 2009-02-21T17:23:17.61 0.1 undecidable manual Pg 123 103.7184 -0.612 75
IV.GSCL.SHZ. 2009-02-21T17:23:16.93 0.6 undecidable manual Pg 95 94.239 0.17 43
GU.FINB.HHZ. 2009-02-21T17:23:16.57 0.3 undecidable manual Pg 252 90.1431 0.453 61
IV.QLNO.HHE. 2009-02-21T17:23:15.40 0.3 undecidable manual Pg 262 84.7485 0.113 66
IV.ERBM.EHE. 2009-02-21T17:23:14.59 0.3 undecidable manual Pg 91 79.9644 0.043 68
MN.VLC.HHN. 2009-02-21T17:23:14.76 0.6 undecidable manual Pg 111 83.5497 -0.351 42
GU.PCP.HHE. 2009-02-21T17:23:12.26 0.1 undecidable manual Pg 281 69.0753 -0.613 80
IV.BOB.HHZ. 2009-02-21T17:23:12.22 0.6 undecidable manual Sg 5 37.629 -0.807 39
IV.BOB.HHZ. 2009-02-21T17:23:07.03 0.1 undecidable manual Pg 5 37.629 -0.45 89
GU.SC2M.HHZ. 2009-02-21T17:23:04.04 0.3 undecidable manual Sg 106 10.6782 0.159 75
GU.SC2M.HHZ. 2009-02-21T17:23:02.34 0.1 undecidable manual Pg 106 10.6782 0.139 100
IV.STR3.BHE. 2009-02-21T17:22:55.41 10.0 undecidable manual Pg 0 0 0
IV.GIUL.HHN. 2009-02-21T17:22:44.11 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
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