Earthquake with magnitude of ML 1.8 on date 22-11-2005 and time 11:32:07 (Italy) in region 5 km SE Castel Guelfo di Bologna (BO)

A magnitude ML 1.8 earthquake occured in region: 5 km SE Castel Guelfo di Bologna (BO), on

  • 22-11-2005 10:32:07 (UTC)
  • 22-11-2005 11:32:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.4, 11.73 at 0 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
Castel Guelfo di Bologna BO 5 4455 4455
Imola BO 6 69797 74252
Mordano BO 6 4760 79012
Bagnara di Romagna RA 8 2429 81441
Massa Lombarda RA 9 10653 92094
Dozza BO 10 6652 98746
Solarolo RA 10 4488 103234
Castel Bolognese RA 11 9554 112788
Medicina BO 11 16739 129527
Sant'Agata sul Santerno RA 11 2862 132389
Castel San Pietro Terme BO 11 20811 153200
Riolo Terme RA 14 5720 158920
Lugo RA 14 32390 191310
Conselice RA 14 9856 201166
Casalfiumanese BO 15 3438 204604
Cotignola RA 17 7474 212078
Faenza RA 18 58541 270619
Borgo Tossignano BO 18 3288 273907
Bagnacavallo RA 19 16739 290646
Fusignano RA 19 8222 298868

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km N of Imola (69797 inhabitants)
18 Km NW of Faenza (58541 inhabitants)
32 Km NW of Forlì (117913 inhabitants)
33 Km E of Bologna (386663 inhabitants)
37 Km W of Ravenna (159116 inhabitants)
49 Km S of Ferrara (133155 inhabitants)
50 Km NW of Cesena (96758 inhabitants)
69 Km E of Modena (184973 inhabitants)
74 Km S of Rovigo (51867 inhabitants)
77 Km W of Rimini (147750 inhabitants)
77 Km NE of Prato (191150 inhabitants)
79 Km SE of Carpi (70699 inhabitants)
80 Km NE of Firenze (382808 inhabitants)
83 Km NE of Pistoia (90315 inhabitants)
84 Km NE of Scandicci (50609 inhabitants)
93 Km E of Reggio nell'Emilia (171345 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 2.4
ML 1.8
2005-11-22
10:32:07
44.4 11.73 1 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 541939
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2005-11-22 10:32:07 ± 0.66
Latitude 44.40 ± 0.02
Longitude 11.73 ± 0.02
Depth (km) 1 ± 6 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 541939

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2125
Semi-minor axis of confidence ellipse (meter) 1541
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 160
Circular confidence region, given by single value of horizontal uncertainty (meter) 2968.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.15
Epicentral distance of station closest to the epicenter (degree) 0.43617
Epicentral distance of station farthest from the epicenter (degree) 4.28437
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 541939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 10:27:36

Md:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 541939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 10:27:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CTI.EHZ. 2005-11-22T10:32:56.95 10.0 undecidable manual Sg 0 1.653 -8.386 0
IV.FVI.SHZ. 2005-11-22T10:32:50.28 0.6 undecidable manual Pg 18 2.3185 1.175 10
IV.PTCC.SHZ. 2005-11-22T10:32:48.96 0.3 undecidable manual Pg 29 2.3095 -0.018 29
IV.PIEI.BHN. 2005-11-22T10:32:45.27 0.1 undecidable manual Sg 146 1.0369 -0.239 43
IV.CSNT.BHN. 2005-11-22T10:32:41.71 0.3 undecidable manual Sg 199 0.9785 -1.881 21
IV.CTI.EHZ. 2005-11-22T10:32:38.08 3.0 undecidable manual Pg 0 1.653 -1.89 0
IV.CRE.EHE. 2005-11-22T10:32:37.88 0.3 undecidable manual Sg 169 0.7941 0.363 28
IV.SNTG.SHZ. 2005-11-22T10:32:35.31 0.6 undecidable manual Pg 142 1.4362 -0.92 30
IV.PZZT.HHN. 2005-11-22T10:32:33.04 0.6 undecidable manual Sg 247 0.679 -0.671 24
IV.BDI.HHN. 2005-11-22T10:32:31.52 0.6 undecidable manual Sg 248 0.8804 -8.849 1
IV.PGD.SHZ. 2005-11-22T10:32:29.81 10.0 undecidable manual Sg 181 0.5225 1.684 0
IV.BADI.EHN. 2005-11-22T10:32:28.17 0.1 undecidable manual Pg 158 0.9605 0.747 75
IV.SFI.SHZ. 2005-11-22T10:32:28.80 0.3 undecidable manual Sg 171 0.4991 1.588 22
IV.FSSB.SHZ. 2005-11-22T10:32:28.48 0.1 undecidable manual Pg 133 1.0279 -0.193 87
IV.PIEI.BHN. 2005-11-22T10:32:28.15 0.1 undecidable manual Pg 146 1.0369 -0.681 76
IV.FNVD.HHN. 2005-11-22T10:32:27.78 0.3 undecidable manual Sg 242 0.4937 0.777 28
IV.CSNT.BHN. 2005-11-22T10:32:27.08 0.1 undecidable manual Pg 199 0.9785 -0.674 79
IV.SEI.SHZ. 2005-11-22T10:32:26.38 0.1 undecidable manual Sg 218 0.4362 1.667 32
IV.VMG.SHZ. 2005-11-22T10:32:26.65 0.3 undecidable manual Sg 197 0.4569 1.121 30
IV.BDI.HHN. 2005-11-22T10:32:25.05 0.6 undecidable manual Pg 248 0.8804 -0.891 40
IV.CRE.EHE. 2005-11-22T10:32:24.51 0.1 undecidable manual Pg 169 0.7941 0.173 92
IV.GSCL.SHZ. 2005-11-22T10:32:23.72 3.0 undecidable manual Pg 0 0.8202 -1.1 0
IV.PZZT.HHN. 2005-11-22T10:32:22.02 0.6 undecidable manual Pg 247 0.679 -0.181 48
IV.ZCCA.EHE. 2005-11-22T10:32:20.31 0.1 undecidable manual Pg 265 0.5432 0.779 77
IV.SFI.SHZ. 2005-11-22T10:32:19.10 0.1 negative manual Pg 171 0.4991 0.551 96
IV.PGD.SHZ. 2005-11-22T10:32:19.84 1.0 undecidable manual Pg 181 0.5225 0.777 22
IV.SEI.SHZ. 2005-11-22T10:32:18.09 0.1 negative manual Pg 218 0.4362 0.944 92
IV.VMG.SHZ. 2005-11-22T10:32:18.34 0.1 undecidable manual Pg 197 0.4569 0.736 96
IV.FNVD.HHN. 2005-11-22T10:32:18.49 0.1 undecidable manual Pg 242 0.4937 0.055 100
IV.FG4.SHZ. 2005-11-22T10:32:05.30 0.1 undecidable manual Pg 0 4.2844 70.788 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.SHZ. Md:2.3 33.2 END duration s
IV.VMG.SHZ. Md:2.3 36.2 END duration s
IV.FNVD.HHN. ML:1.9 0.00019 0.24 AML other m 2005-11-22T10:32:18.49
IV.FNVD.HHE. ML:1.9 0.00016 0.58 AML other m 2005-11-22T10:32:18.49
IV.SFI.SHZ. Md:2.3 33.7 END duration s
IV.ZCCA.EHN. ML:0.9 2.0E-5 0.64 AML other m 2005-11-22T10:32:20.31
IV.ZCCA.EHE. ML:0.9 1.5E-5 3 AML other m 2005-11-22T10:32:20.31
IV.CRE.EHN. ML:2.4 0.0003 0.28 AML other m 2005-11-22T10:32:24.51
IV.CRE.EHE. ML:2.4 0.0003 0.56 AML other m 2005-11-22T10:32:24.51
IV.CSNT.BHN. ML:1.9 8.5E-5 0.68 AML other m 2005-11-22T10:32:27.08
IV.CSNT.BHE. ML:1.9 6.5E-5 2.24 AML other m 2005-11-22T10:32:27.08
IV.PIEI.BHN. Md:2.5 41.4 END duration s
IV.PIEI.BHE. ML:1.8 6.0E-5 0.16 AML other m 2005-11-22T10:32:28.15
IV.FSSB.SHZ. Md:2.5 42 END duration s
IV.SNTG.SHZ. Md:2 15 END duration s
IV.PTCC.SHZ. Md:2.2 13.1 END duration s
IV.FVI.SHZ. Md:2.9 54.2 END duration s
IV.FG4.SHZ. Md:3 45 END duration s
IV.PGD.SHZ. Md:2 22 END duration s
IV.PZZT.HHN. Md:2 20.6 END duration s
IV.GSCL.SHZ. Md:2.3 32.8 END duration s
IV.BDI.HHN. Md:2.1 24.2 END duration s
IV.CTI.EHZ. Md:2.6 38.3 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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