Earthquake with magnitude of ML 2.1 on date 28-07-2009 and time 17:52:28 (Italy) in region 1 km W Cerignale (PC)

A magnitude ML 2.1 earthquake occured in region: 1 km W Cerignale (PC), on

  • 28-07-2009 15:52:28 (UTC)
  • 28-07-2009 17:52:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.68, 9.34 at 1 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
Cerignale PC 1 127 127
Zerba PC 5 77 204
Corte Brugnatella PC 5 586 790
Ottone PC 7 516 1306
Brallo di Pregola PV 8 599 1905
Coli PC 9 879 2784
Gorreto GE 9 97 2881
Bobbio PC 10 3577 6458
Rovegno GE 13 554 7012
Santa Margherita di Staffora PV 13 473 7485
Ferriere PC 13 1294 8779
Menconico PV 14 360 9139
Carrega Ligure AL 15 84 9223
Fontanigorda GE 15 277 9500
Fascia GE 15 81 9581
Rondanina GE 17 62 9643
Fabbrica Curone AL 17 656 10299
Santo Stefano d'Aveto GE 17 1126 11425
Romagnese PV 17 687 12112
Rezzoaglio GE 18 995 13107
Propata GE 18 142 13249
Montebruno GE 19 240 13489
Farini PC 19 1290 14779
Cabella Ligure AL 19 528 15307
Varzi PV 19 3279 18586

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NE of Genova (586655 inhabitants)
50 Km SW of Piacenza (102191 inhabitants)
58 Km S of Pavia (72576 inhabitants)
63 Km E of Alessandria (93943 inhabitants)
74 Km SW of Cremona (71901 inhabitants)
75 Km NW of La Spezia (93959 inhabitants)
79 Km W of Parma (192836 inhabitants)
80 Km NE of Savona (61345 inhabitants)
80 Km SE of Vigevano (63310 inhabitants)
88 Km S of Milano (1345851 inhabitants)
90 Km NW of Carrara (63133 inhabitants)
93 Km E of Asti (76202 inhabitants)
95 Km S of Sesto San Giovanni (81608 inhabitants)
96 Km NW of Massa (69479 inhabitants)
97 Km S of Rho (50434 inhabitants)
98 Km S of Cinisello Balsamo (75078 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 ML 2.1 2009-07-28
15:52:28
44.68 9.34 1 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 937329
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-07-28 15:52:28 ± 0.09
Latitude 44.68 ± 0.01
Longitude 9.34 ± 0.01
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 937329

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 632
Semi-minor axis of confidence ellipse (meter) 579
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 848.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.5936
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 16
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 937329
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 17:52:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ESLN.HHZ. 2009-07-28T15:53:38.97 10.0 undecidable manual Pg 0 0 0
MN.TUE.HHE. 2009-07-28T15:53:23.15 10.0 undecidable manual Pg 0 0 0
IV.MTGR.SHZ. 2009-07-28T15:53:21.60 10.0 undecidable manual Pg 0 0 0
IV.MABI.HHZ. 2009-07-28T15:53:20.93 10.0 undecidable manual Sg 0 0 0
CH.MMK.HHE. 2009-07-28T15:53:20.94 10.0 undecidable manual Pg 0 0 0
IV.FAVR.SHZ. 2009-07-28T15:53:20.61 10.0 undecidable manual Pg 0 0 0
IV.PZZT.HHN. 2009-07-28T15:53:15.60 10.0 undecidable manual Sg 0 0 0
IV.PZZT.HHN. 2009-07-28T15:53:10.47 10.0 undecidable manual Pg 0 0 0
GU.MAIM.HHN. 2009-07-28T15:53:07.65 10.0 undecidable manual Pg 0 0 0
GU.RORO.HHE. 2009-07-28T15:53:05.03 0.6 undecidable manual Sg 238 1.0747 0.549 37
IV.MABI.HHZ. 2009-07-28T15:52:58.18 10.0 undecidable manual Pg 0 0 0
IV.DOI.HHE. 2009-07-28T15:52:57.37 0.3 undecidable manual Pg 264 1.501 1.004 40
GU.PZZ.HHZ. 2009-07-28T15:52:57.99 0.6 undecidable manual Pg 264 1.5936 0.047 34
GU.BHB.HHE. 2009-07-28T15:52:56.04 0.6 undecidable manual Pg 277 1.4821 -0.003 37
GU.STV.HHE. 2009-07-28T15:52:56.64 0.6 undecidable manual Pg 254 1.5028 0.254 34
IV.MAGA.HHZ. 2009-07-28T15:52:54.90 10.0 undecidable manual Pg 0 0 0
CH.MUGIO.HHZ. 2009-07-28T15:52:52.06 0.3 undecidable manual Pg 350 1.2555 -0.107 59
IV.BULG.HHN. 2009-07-28T15:52:51.63 10.0 undecidable manual Pg 0 0 0
GU.PCP.HHZ. 2009-07-28T15:52:49.04 0.3 undecidable manual Sg 256 0.5837 -0.904 53
IV.MDI.HHZ. 2009-07-28T15:52:49.96 0.3 undecidable manual Pg 14 1.117 0.16 60
GU.RORO.HHE. 2009-07-28T15:52:49.18 0.6 undecidable manual Pg 238 1.0747 0.113 41
IV.BDI.HHN. 2009-07-28T15:52:49.73 0.6 undecidable manual Pg 124 1.0909 0.385 38
MN.VLC.HHN. 2009-07-28T15:52:46.39 0.3 undecidable manual Pg 125 0.911 0.113 64
GU.FINB.HHE. 2009-07-28T15:52:46.09 0.6 undecidable manual Pg 235 0.884 0.286 41
IV.QLNO.HHZ. 2009-07-28T15:52:44.56 0.3 undecidable manual Pg 244 0.795 0.274 63
IV.ERBM.EHZ. 2009-07-28T15:52:44.66 0.3 undecidable manual Pg 109 0.8076 0.163 64
IV.MSSA.HHZ. 2009-07-28T15:52:42.47 0.3 undecidable manual Sg 161 0.3876 -0.478 66
GU.SC2M.HHZ. 2009-07-28T15:52:40.28 0.6 undecidable manual Sg 154 0.3112 0.291 46
GU.PCP.HHZ. 2009-07-28T15:52:40.06 0.3 undecidable manual Pg 256 0.5837 -0.614 60
IV.MSSA.HHZ. 2009-07-28T15:52:36.30 0.1 undecidable manual Pg 161 0.3876 -0.333 90
GU.SC2M.HHZ. 2009-07-28T15:52:35.11 0.1 undecidable manual Pg 154 0.3112 0.183 95
IV.BOB.HHZ. 2009-07-28T15:52:32.24 0.3 undecidable manual Sg 42 0.1133 -0.165 74
IV.BOB.HHZ. 2009-07-28T15:52:30.44 0.1 undecidable manual Pg 42 0.1133 -0.104 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.SC2M.HHN. ML:2.5 0.00125 0.38 AML other m 2009-07-28T15:52:35.11
GU.SC2M.HHE. ML:2.5 0.00125 0.38 AML other m 2009-07-28T15:52:35.11
IV.MSSA.HHN. ML:1.9 0.00029 0.68 AML other m 2009-07-28T15:52:36.30
IV.MSSA.HHE. ML:1.9 0.00029 0.68 AML other m 2009-07-28T15:52:36.30
GU.PCP.HHN. ML:1.8 0.000135 0.84 AML other m 2009-07-28T15:52:40.06
GU.PCP.HHE. ML:1.8 0.000115 0.6 AML other m 2009-07-28T15:52:40.06
IV.QLNO.HHN. ML:1.8 8.5E-5 0.76 AML other m 2009-07-28T15:52:44.56
IV.QLNO.HHE. ML:1.8 6.0E-5 1.34 AML other m 2009-07-28T15:52:44.56
IV.ERBM.EHN. ML:2.7 0.000575 66.8 AML other m 2009-07-28T15:52:44.66
IV.ERBM.EHE. ML:2.7 0.002005 67.72 AML other m 2009-07-28T15:52:44.66
GU.FINB.HHN. ML:2.3 0.00017 0.56 AML other m 2009-07-28T15:52:46.09
GU.FINB.HHE. ML:2.3 0.000215 0.48 AML other m 2009-07-28T15:52:46.09
MN.VLC.HHN. ML:1.8 6.5E-5 0.8 AML other m 2009-07-28T15:52:46.39
MN.VLC.HHE. ML:1.8 6.5E-5 0.74 AML other m 2009-07-28T15:52:46.39
GU.RORO.HHN. ML:1.8 5.5E-5 0.46 AML other m 2009-07-28T15:52:49.18
GU.RORO.HHE. ML:1.8 4.5E-5 0.9 AML other m 2009-07-28T15:52:49.18
IV.BDI.HHN. ML:2.1 9.5E-5 0.66 AML other m 2009-07-28T15:52:49.73
IV.BDI.HHE. ML:2.1 8.5E-5 0.54 AML other m 2009-07-28T15:52:49.73
IV.MDI.HHN. ML:2.2 0.00012 0.49 AML other m 2009-07-28T15:52:49.96
IV.MDI.HHE. ML:2.2 0.00012 0.49 AML other m 2009-07-28T15:52:49.96
IV.MAGA.HHN. ML:0 0.000255 0.72 AML other m 2009-07-28T15:52:54.90
IV.MAGA.HHE. ML:0 0.000375 0.58 AML other m 2009-07-28T15:52:54.90
GU.BHB.HHN. ML:2.1 6.0E-5 0.54 AML other m 2009-07-28T15:52:56.04
GU.BHB.HHE. ML:2.1 5.5E-5 0.5 AML other m 2009-07-28T15:52:56.04
GU.STV.HHN. ML:2 4.0E-5 0.94 AML other m 2009-07-28T15:52:56.64
GU.STV.HHE. ML:2 4.0E-5 0.76 AML other m 2009-07-28T15:52:56.64
IV.DOI.HHN. ML:2.4 9.0E-5 0.54 AML other m 2009-07-28T15:52:57.37
IV.DOI.HHE. ML:2.4 0.000125 0.6 AML other m 2009-07-28T15:52:57.37
GU.PZZ.HHN. ML:2.4 0.000105 0.66 AML other m 2009-07-28T15:52:57.99
GU.PZZ.HHE. ML:2.4 6.0E-5 0.42 AML other m 2009-07-28T15:52:57.99
IV.MABI.HHN. ML:0 3.0E-5 0.72 AML other m 2009-07-28T15:52:58.18
IV.MABI.HHE. ML:0 4.0E-5 1 AML other m 2009-07-28T15:52:58.18
GU.MAIM.HHN. ML:0 5.5E-5 0.78 AML other m 2009-07-28T15:53:07.65
GU.MAIM.HHE. ML:0 6.5E-5 0.6 AML other m 2009-07-28T15:53:07.65
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
Waveforms Seismic signals in full SEED format Download