Earthquake with magnitude of ML 3.1 on date 06-10-2011 and time 17:11:46 (UTC) in region 5 km N Rezzoaglio (GE)

A magnitude ML 3.1 earthquake occured in region: 5 km N Rezzoaglio (GE), on

  • 06-10-2011 17:11:46 (UTC)
  • 06-10-2011 19:11:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5750, 9.3740 at 5 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Rezzoaglio GE 6 995 995
Fontanigorda GE 6 277 1272
Ottone PC 6 516 1788
Santo Stefano d'Aveto GE 7 1126 2914
Gorreto GE 7 97 3011
Rovegno GE 8 554 3565
Fascia GE 11 81 3646
Montebruno GE 11 240 3886
Cerignale PC 12 127 4013
Zerba PC 12 77 4090
Rondanina GE 12 62 4152
Ferriere PC 13 1294 5446
Propata GE 15 142 5588
Corte Brugnatella PC 15 586 6174
Favale di Malvaro GE 16 466 6640
Carrega Ligure AL 16 84 6724
Borzonasca GE 17 2049 8773
Lorsica GE 18 468 9241
Torriglia GE 18 2311 11552
Coli PC 19 879 12431
Brallo di Pregola PV 20 599 13030
Neirone GE 20 916 13946

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Genova (586655 inhabitants)
59 Km SW of Piacenza (102191 inhabitants)
63 Km NW of La Spezia (93959 inhabitants)
70 Km S of Pavia (72576 inhabitants)
71 Km SE of Alessandria (93943 inhabitants)
77 Km E of Savona (61345 inhabitants)
80 Km W of Parma (192836 inhabitants)
80 Km NW of Carrara (63133 inhabitants)
81 Km SW of Cremona (71901 inhabitants)
86 Km NW of Massa (69479 inhabitants)
92 Km SE of Vigevano (63310 inhabitants)
99 Km E of Asti (76202 inhabitants)
100 Km S of Milano (1345851 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 3.0
ML 3.1
2011-10-06
17:11:46
44.575 9.374 5 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 1294739
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-10-06 17:11:46 ± 0.16
Latitude 44.5750 ± 0.0063
Longitude 9.3740 ± 0.0101
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1294739

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 653
Semi-minor axis of confidence ellipse (meter) 522
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 226
Circular confidence region, given by single value of horizontal uncertainty (meter) 1063.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 105
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.71
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 2.08373
Number of stations at which the event was observed 80
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:3.1

Field Value
Value 3.1
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 1294739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:39:11

Md:3.0

Field Value
Value 3.0
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1294739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:39:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.KOSI.HHE. 2011-10-06T17:12:56.41 10.0 undecidable manual Sn 0 0 0
CH.DAVOX.HHE. 2011-10-06T17:12:53.70 10.0 undecidable manual Sn 0 0 0
CH.FUSIO.HHE. 2011-10-06T17:12:49.09 10.0 undecidable manual Sn 0 0 0
IV.ATCC.EHE. 2011-10-06T17:12:44.88 10.0 undecidable manual Sn 0 0 0
CH.BERNI.HHE. 2011-10-06T17:12:43.79 10.0 undecidable manual Sn 0 0 0
IV.ATCC.EHE. 2011-10-06T17:12:41.36 10.0 undecidable manual Pn 0 0 0
SI.ROSI.HHN. 2011-10-06T17:12:41.56 10.0 undecidable manual Pn 0 0 0
IV.RDP.HHN. 2011-10-06T17:12:41.29 10.0 undecidable manual Pn 0 0 0
GU.RSP.HHN. 2011-10-06T17:12:40.52 10.0 undecidable manual Sg 0 0 0
GU.SATI.HHN. 2011-10-06T17:12:39.13 10.0 undecidable manual Pn 0 0 0
IV.MURB.HHN. 2011-10-06T17:12:39.72 10.0 undecidable manual Sn 0 0 0
GU.BHB.HHN. 2011-10-06T17:12:38.83 10.0 undecidable manual Sg 0 0 0
SI.RISI.HHZ. 2011-10-06T17:12:36.81 10.0 undecidable manual Pn 0 0 0
SI.ABSI.HHN. 2011-10-06T17:12:35.90 10.0 undecidable manual Sn 0 0 0
SI.KOSI.HHE. 2011-10-06T17:12:35.56 10.0 undecidable manual Pn 0 0 0
IV.FNVD.HHE. 2011-10-06T17:12:35.50 10.0 undecidable manual Sg 0 0 0
IV.MPAG.EHZ. 2011-10-06T17:12:35.63 10.0 undecidable manual Pn 0 0 0
NI.AGOR.HHZ. 2011-10-06T17:12:35.49 10.0 undecidable manual Pn 0 0 0
IV.ATMC.EHZ. 2011-10-06T17:12:34.02 10.0 undecidable manual Sn 0 0 0
IV.MURB.HHN. 2011-10-06T17:12:34.20 10.0 undecidable manual Pn 0 0 0
IV.SSFR.HHE. 2011-10-06T17:12:33.99 10.0 undecidable manual Pn 0 0 0
IV.ATTE.HHZ. 2011-10-06T17:12:33.84 10.0 undecidable manual Pn 0 0 0
IV.PARC.HHZ. 2011-10-06T17:12:33.97 10.0 undecidable manual Sn 0 0 0
IV.ATPC.HHN. 2011-10-06T17:12:33.24 10.0 undecidable manual Pn 0 0 0
IV.RAVA.EHN. 2011-10-06T17:12:32.83 10.0 undecidable manual Pn 0 0 0
IV.ATVO.HHZ. 2011-10-06T17:12:32.31 10.0 undecidable manual Pn 0 0 0
IV.CAFI.HHE. 2011-10-06T17:12:32.29 10.0 undecidable manual Sn 0 0 0
IV.CPGN.EHZ. 2011-10-06T17:12:32.22 10.0 undecidable manual Pn 0 0 0
IV.PIEI.HHE. 2011-10-06T17:12:31.71 10.0 undecidable manual Pn 0 0 0
SI.ABSI.HHN. 2011-10-06T17:12:31.73 10.0 undecidable manual Pn 0 0 0
IV.ATMC.EHZ. 2011-10-06T17:12:30.84 10.0 undecidable manual Pn 0 0 0
CH.DIX.HHN. 2011-10-06T17:12:29.70 10.0 undecidable manual Pn 0 0 0
NI.CGRP.HHE. 2011-10-06T17:12:29.37 10.0 undecidable manual Sn 0 0 0
CH.DAVOX.HHE. 2011-10-06T17:12:29.28 10.0 undecidable manual Pn 0 0 0
IV.PARC.HHZ. 2011-10-06T17:12:28.56 10.0 undecidable manual Pn 0 0 0
IV.MRB1.HHN. 2011-10-06T17:12:28.57 10.0 undecidable manual Pn 0 0 0
IV.CAFI.HHE. 2011-10-06T17:12:27.65 10.0 undecidable manual Pn 0 0 0
IV.APPI.EHN. 2011-10-06T17:12:27.87 10.0 undecidable manual Pn 0 0 0
CH.FUSIO.HHE. 2011-10-06T17:12:26.12 10.0 undecidable manual Pn 0 0 0
IV.GROG.HHZ. 2011-10-06T17:12:25.59 0.1 undecidable manual Sg 162 133.9659 -0.303 77
IV.BRMO.HHE. 2011-10-06T17:12:25.86 10.0 undecidable manual Pn 0 0 0
IV.ILLI.HHZ. 2011-10-06T17:12:25.54 10.0 undecidable manual Pn 0 0 0
NI.CGRP.HHE. 2011-10-06T17:12:25.90 10.0 undecidable manual Pn 0 0 0
SI.MOSI.HHZ. 2011-10-06T17:12:25.43 10.0 undecidable manual Pn 0 0 0
CH.BERNI.HHE. 2011-10-06T17:12:24.87 10.0 undecidable manual Pn 0 0 0
IV.NOVE.EHE. 2011-10-06T17:12:23.93 10.0 undecidable manual Sg 0 0 0
IV.ASQU.HHZ. 2011-10-06T17:12:23.87 10.0 undecidable manual Pn 0 0 0
GU.RRL.HHZ. 2011-10-06T17:12:23.88 10.0 undecidable manual Pn 0 0 0
IV.SFI.EHZ. 2011-10-06T17:12:22.98 10.0 undecidable manual Pn 0 0 0
IV.TRIF.HHN. 2011-10-06T17:12:21.25 10.0 undecidable manual Pn 0 0 0
IV.CASP.HHZ. 2011-10-06T17:12:21.11 0.3 undecidable manual Pg 148 231.2907 -1.598 20
IV.BDI.HHE. 2011-10-06T17:12:21.29 0.1 undecidable manual Sg 120 112.4985 1.122 59
GU.MAIM.HHZ. 2011-10-06T17:12:20.93 0.1 undecidable manual Sg 129 115.1958 0.055 84
IV.NOVE.EHE. 2011-10-06T17:12:20.29 10.0 undecidable manual Pg 0 0 0
MN.TUE.HHN. 2011-10-06T17:12:20.33 0.3 undecidable manual Pg 359 210.5337 0.207 41
IV.CSNT.HHZ. 2011-10-06T17:12:20.06 10.0 undecidable manual Pg 0 0 0
GU.RSP.HHN. 2011-10-06T17:12:19.55 10.0 undecidable manual Pg 0 0 0
IV.VMG.SHZ. 2011-10-06T17:12:19.65 10.0 undecidable manual Pg 0 0 0
IV.SEI.SHZ. 2011-10-06T17:12:18.36 10.0 undecidable manual Pg 0 0 0
IV.MTRZ.HHN. 2011-10-06T17:12:18.33 10.0 undecidable manual Pg 0 0 0
GU.PZZ.HHE. 2011-10-06T17:12:17.94 10.0 undecidable manual Pg 0 0 0
IV.MABI.HHN. 2011-10-06T17:12:16.65 0.3 undecidable manual Pg 28 186.7686 -0.517 44
IV.DOI.HHE. 2011-10-06T17:12:16.12 10.0 undecidable manual Pg 0 0 0
GU.BHB.HHN. 2011-10-06T17:12:16.96 10.0 undecidable manual Pg 0 0 0
IV.SASS.HHZ. 2011-10-06T17:12:15.38 0.3 undecidable manual Pg 144 179.9865 -0.92 39
IV.FNVD.HHE. 2011-10-06T17:12:15.27 10.0 undecidable manual Pg 0 0 0
IV.ROVR.HHZ. 2011-10-06T17:12:15.31 0.1 undecidable manual Pg 48 178.3881 -0.742 57
GU.FINB.HHZ. 2011-10-06T17:12:15.93 0.1 undecidable manual Sg 242 94.0392 0.686 74
GU.TRAV.HHE. 2011-10-06T17:12:14.40 0.3 undecidable manual Pg 310 164.5131 0.482 50
IV.CRMI.HHZ. 2011-10-06T17:12:13.76 0.1 undecidable manual Pg 124 153.9348 1.474 44
IV.MAGA.HHN. 2011-10-06T17:12:13.78 0.3 undecidable manual Pg 36 165.4122 -0.271 52
IV.QLNO.HHE. 2011-10-06T17:12:13.55 0.1 undecidable manual Sg 251 85.9473 0.465 82
IV.MONC.HHZ. 2011-10-06T17:12:12.68 10.0 undecidable manual Pg 0 0 0
IV.VARE.HHN. 2011-10-06T17:12:12.50 0.1 undecidable manual Pg 342 150.9378 0.675 66
GU.ENR.HHE. 2011-10-06T17:12:12.74 0.3 undecidable manual Pg 257 159.5181 -0.407 52
CH.MUGIO.HHZ. 2011-10-06T17:12:12.20 0.3 undecidable manual Pg 350 151.6371 0.269 56
IV.SALO.HHZ. 2011-10-06T17:12:11.87 0.3 undecidable manual Pg 37 146.742 0.706 50
IV.PTF.SHE. 2011-10-06T17:12:11.47 10.0 undecidable manual Pg 0 0 0
IV.ZCCA.HHZ. 2011-10-06T17:12:11.69 10.0 undecidable manual Pg 0 0 0
GU.NEGI.HHZ. 2011-10-06T17:12:11.61 0.3 undecidable manual Pg 239 155.5221 -0.915 44
IV.IMI.HHZ. 2011-10-06T17:12:09.37 0.1 undecidable manual Pg 238 138.861 -0.58 71
IV.GROG.HHZ. 2011-10-06T17:12:08.68 0.1 undecidable manual Pg 162 133.9659 -0.525 73
GU.PCP.HHE. 2011-10-06T17:12:07.46 0.1 undecidable manual Sg 267 65.5899 -0.176 91
IV.PLMA.HHZ. 2011-10-06T17:12:07.14 0.1 undecidable manual Sg 147 69.5748 -1.57 50
IV.BDI.HHE. 2011-10-06T17:12:06.63 0.1 undecidable manual Pg 120 112.4985 0.731 70
GU.MAIM.HHZ. 2011-10-06T17:12:06.13 0.3 undecidable manual Pg 129 115.1958 -0.178 62
IV.IFIL.EHN. 2011-10-06T17:12:05.42 10.0 undecidable manual Pg 0 0 0
IV.CTL8.EHZ. 2011-10-06T17:12:04.25 10.0 undecidable manual Pg 0 0 0
GU.ROTM.HHZ. 2011-10-06T17:12:04.71 10.0 undecidable manual Pg 0 0 0
GU.FINB.HHZ. 2011-10-06T17:12:03.47 0.1 undecidable manual Pg 242 94.0392 0.413 82
MN.VLC.HHE. 2011-10-06T17:12:02.78 0.1 undecidable manual Pg 119 92.6406 -0.048 88
IV.ORI.HHZ. 2011-10-06T17:12:02.58 10.0 undecidable manual Pg 0 0 0
IV.QLNO.HHE. 2011-10-06T17:12:01.82 0.1 undecidable manual Pg 251 85.9473 0.01 90
IV.PRMA.HHN. 2011-10-06T17:12:01.09 0.6 undecidable manual Pg 74 77.0673 0.661 39
IV.ESLN.HHZ. 2011-10-06T17:12:00.86 10.0 undecidable manual Pg 0 0 0
GU.PCP.HHE. 2011-10-06T17:11:58.50 0.1 undecidable manual Pg 267 65.5899 -0.164 91
IV.PLMA.HHZ. 2011-10-06T17:11:58.73 0.1 undecidable manual Pg 147 69.5748 -0.554 82
IV.FSSB.HHE. 2011-10-06T17:11:58.22 10.0 undecidable manual Pg 0 0 0
IV.MSSA.HHZ. 2011-10-06T17:11:57.16 0.1 undecidable manual Sg 158 30.8469 -0.117 98
GU.SC2M.HHZ. 2011-10-06T17:11:55.07 0.1 undecidable manual Sg 146 22.755 0.537 90
IV.BOB.HHZ. 2011-10-06T17:11:53.90 0.1 undecidable manual Sg 15 22.1556 -0.435 93
IV.MSSA.HHZ. 2011-10-06T17:11:52.68 0.1 undecidable manual Pg 158 30.8469 -0.003 100
GU.SC2M.HHZ. 2011-10-06T17:11:51.40 0.1 undecidable manual Pg 146 22.755 0.3 95
IV.BOB.HHZ. 2011-10-06T17:11:50.89 0.1 undecidable manual Pg 15 22.1556 -0.093 100
IV.CELB.HHE. 2011-10-06T17:11:33.09 10.0 undecidable manual Pg 0 0 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
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