Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 04-10-2011 and time 04:44:19 (UTC) in region 6 km NW Santo Stefano d'Aveto (GE)

A magnitude ML 1.9 earthquake occured in region: 6 km NW Santo Stefano d'Aveto (GE), on

  • 04-10-2011 04:44:19 (UTC)
  • 04-10-2011 06:44:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5930, 9.4130 at 10 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
Santo Stefano d'Aveto GE 6 1126 1126
Ottone PC 7 516 1642
Rezzoaglio GE 8 995 2637
Ferriere PC 9 1294 3931
Gorreto GE 10 97 4028
Fontanigorda GE 10 277 4305
Cerignale PC 11 127 4432
Rovegno GE 11 554 4986
Zerba PC 13 77 5063
Corte Brugnatella PC 14 586 5649
Fascia GE 14 81 5730
Montebruno GE 15 240 5970
Rondanina GE 16 62 6032
Coli PC 17 879 6911
Propata GE 18 142 7053
Farini PC 18 1290 8343
Carrega Ligure AL 19 84 8427
Borzonasca GE 19 2049 10476
Brallo di Pregola PV 19 599 11075
Bobbio PC 20 3577 14652
Favale di Malvaro GE 20 466 15118
Bedonia PR 20 3482 18600

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Genova (586655 inhabitants)
56 Km SW of Piacenza (102191 inhabitants)
63 Km NW of La Spezia (93959 inhabitants)
69 Km SE of Pavia (72576 inhabitants)
72 Km E of Alessandria (93943 inhabitants)
76 Km W of Parma (192836 inhabitants)
77 Km SW of Cremona (71901 inhabitants)
79 Km NW of Carrara (63133 inhabitants)
80 Km E of Savona (61345 inhabitants)
85 Km NW of Massa (69479 inhabitants)
92 Km SE of Vigevano (63310 inhabitants)
97 Km W of Reggio nell'Emilia (171345 inhabitants)
99 Km S of Milano (1345851 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 1.9 		2011-10-04
04:44:19		 44.593 9.413 10 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1293809
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-10-04 04:44:19 ± 0.22
Latitude 44.5930 ± 0.0063
Longitude 9.4130 ± 0.0417
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1293809

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3325
Semi-minor axis of confidence ellipse (meter) 392
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 3373.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 203
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.62773
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1293809
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:37:53

Md:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1293809
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:37:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ORI.HHN. 2011-10-04T04:44:56.95 10.0 undecidable manual Pg 0 0 0
IV.STR3.BHN. 2011-10-04T04:44:54.38 10.0 undecidable manual Pg 0 0 0
IV.MCIV.HHZ. 2011-10-04T04:44:53.63 10.0 undecidable manual Pg 0 0 0
IV.IACL.HHE. 2011-10-04T04:44:48.00 10.0 undecidable manual Pg 0 0 0
IV.PLMA.HHE. 2011-10-04T04:44:40.26 0.3 undecidable manual Sg 150 69.6747 -0.066 68
IV.PLMA.HHE. 2011-10-04T04:44:31.70 0.1 undecidable manual Pg 150 69.6747 0.35 86
IV.MSSA.HHE. 2011-10-04T04:44:30.02 0.3 undecidable manual Sg 165 31.746 -0.196 71
GU.SC2M.HHZ. 2011-10-04T04:44:27.82 0.3 undecidable manual Sg 155 22.9548 0.001 75
IV.BOB.HHZ. 2011-10-04T04:44:26.57 0.3 undecidable manual Sg 8 19.6692 -0.191 73
IV.MSSA.HHE. 2011-10-04T04:44:25.43 0.1 undecidable manual Pg 165 31.746 -0.082 97
GU.SC2M.HHZ. 2011-10-04T04:44:24.11 0.1 undecidable manual Pg 155 22.9548 -0.019 100
IV.BOB.HHZ. 2011-10-04T04:44:23.64 0.1 undecidable manual Pg 8 19.6692 0.123 98
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