Earthquake with magnitude of ML 2.8 on date 05-04-2011 and time 01:28:23 (Italy) in region 4 km E Lagonegro (PZ)

A magnitude ML 2.8 earthquake occured in region: 4 km E Lagonegro (PZ), on

  • 04-04-2011 23:28:23 (UTC)
  • 05-04-2011 01:28:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.11, 15.81 at 291 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
Lagonegro PZ 4 5584 5584
Nemoli PZ 5 1495 7079
Rivello PZ 5 2767 9846
Lauria PZ 7 12919 22765
Trecchina PZ 9 2316 25081
Maratea PZ 14 5139 30220
Torraca SA 14 1263 31483
Sapri SA 15 6770 38253
Moliterno PZ 16 4062 42315
Casalbuono SA 16 1194 43509
Casaletto Spartano SA 17 1420 44929
Sarconi PZ 17 1404 46333
Castelsaraceno PZ 17 1384 47717
Tortorella SA 17 523 48240
Latronico PZ 17 4556 52796
Castelluccio Superiore PZ 18 824 53620
Castelluccio Inferiore PZ 18 2131 55751
Vibonati SA 19 3293 59044
Aieta CS 20 823 59867

Municipalities with at least 50000 inhabitants

An earthquake occurred to
59 Km S of Potenza (67122 inhabitants)
89 Km SE of Battipaglia (50786 inhabitants)
92 Km SW of Matera (60436 inhabitants)
98 Km NW of Cosenza (67546 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 ( 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.
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 ( 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 2.8 2011-04-04
40.11 15.81 291 2014-10-21
Bollettino Sismico Italiano INGV 1192089
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2011-04-04 23:28:23 ± 0.27
Latitude 40.11 ± 0.02
Longitude 15.81 ± 0.04
Depth (km) 291 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1192089


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3311
Semi-minor axis of confidence ellipse (meter) 763
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 3759
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 2.16017
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 26
Magnitude information


Field Value
Value 2.8
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1192089
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:17:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PLAC.HHZ. 2011-04-04T23:29:41.62 0.6 undecidable manual Sg 163 1.7285 -0.272 31
IV.SERS.HHZ. 2011-04-04T23:29:36.31 0.6 undecidable manual Sg 147 1.2689 0.034 40
MN.TIP.HHZ. 2011-04-04T23:29:35.47 0.6 undecidable manual Sg 141 1.1826 0.095 41
IV.LADO.HHZ. 2011-04-04T23:29:35.62 0.6 undecidable manual Sg 132 1.2213 -0.157 40
IV.PIPA.HHE. 2011-04-04T23:29:33.40 0.6 undecidable manual Sg 129 0.9938 -0.192 42
IV.CAR1.HHZ. 2011-04-04T23:29:31.77 0.6 undecidable manual Sg 160 0.9092 -1.106 31
IV.SIRI.HHN. 2011-04-04T23:29:29.81 0.6 undecidable manual Sg 32 0.0863 0.688 44
IV.MCEL.HHE. 2011-04-04T23:29:29.76 0.6 undecidable manual Sg 359 0.2158 0.448 46
IV.SALB.HHZ. 2011-04-04T23:29:29.63 0.6 undecidable manual Sg 119 0.473 -0.503 44
IV.SAMA.HHZ. 2011-04-04T23:29:29.86 10.0 undecidable manual Pg 0 0 0
IV.MMGO.SHZ. 2011-04-04T23:29:27.34 10.0 undecidable manual Pg 0 0 0
IV.RM32.EHE. 2011-04-04T23:29:25.96 10.0 undecidable manual Pg 0 0 0
IV.CAFE.HHZ. 2011-04-04T23:29:13.43 10.0 undecidable manual Pg 0 0 0
IV.MPAZ.HHZ. 2011-04-04T23:29:12.32 0.3 undecidable manual Pg 176 2.1602 -0.116 35
IV.SOI.EHZ. 2011-04-04T23:29:11.30 0.1 undecidable manual Pg 175 2.0433 -0.104 52
IV.IFIL.EHZ. 2011-04-04T23:29:11.89 10.0 undecidable manual Pg 0 0 0
IV.MILZ.HHZ. 2011-04-04T23:29:10.05 0.3 undecidable manual Pg 194 1.8895 -0.046 44
MN.CEL.HHN. 2011-04-04T23:29:09.51 0.1 undecidable manual Pg 178 1.8481 -0.245 57
IV.PLAC.HHZ. 2011-04-04T23:29:09.02 0.1 undecidable manual Pg 163 1.7285 0.231 62
IV.MSRU.HHZ. 2011-04-04T23:29:09.34 0.1 undecidable manual Pg 187 1.858 -0.489 54
IV.MSCL.HHZ. 2011-04-04T23:29:09.53 0.1 undecidable manual Pg 180 1.876 -0.445 54
IV.VAGA.HHN. 2011-04-04T23:29:08.66 0.3 undecidable manual Pg 318 1.7672 -0.441 43
IV.GRI.EHZ. 2011-04-04T23:29:06.92 0.1 undecidable manual Pg 160 1.3697 0.723 65
IV.SERS.HHZ. 2011-04-04T23:29:06.10 0.1 undecidable manual Pg 147 1.2689 0.549 72
IV.LADO.HHZ. 2011-04-04T23:29:05.50 0.1 undecidable manual Pg 132 1.2213 0.238 79
MN.TIP.HHZ. 2011-04-04T23:29:05.50 0.1 undecidable manual Pg 141 1.1826 0.47 75
IV.PIPA.HHE. 2011-04-04T23:29:04.15 0.1 undecidable manual Pg 129 0.9938 0.147 84
IV.NOCI.HHZ. 2011-04-04T23:29:04.46 0.3 undecidable manual Pg 54 1.1727 -0.514 55
IV.CAR1.HHZ. 2011-04-04T23:29:03.34 0.1 undecidable manual Pg 160 0.9092 -0.246 84
GE.MATE.HHZ. 2011-04-04T23:29:03.02 0.1 undecidable manual Pg 51 0.8705 -0.388 82
IV.LTRZ.EHZ. 2011-04-04T23:29:03.16 0.1 undecidable manual Pg 57 0.9155 -0.461 80
IV.MCRV.HHE. 2011-04-04T23:29:03.10 0.1 undecidable manual Pg 324 0.8301 -0.134 88
IV.CRAC.EHN. 2011-04-04T23:29:02.27 0.1 undecidable manual Pg 62 0.5432 0.077 94
IV.ORI.HHE. 2011-04-04T23:29:02.78 0.3 undecidable manual Pg 96 0.4946 0.717 60
IV.BULG.HHZ. 2011-04-04T23:29:01.89 0.1 undecidable manual Pg 265 0.3301 0.193 96
IV.SLCN.HHN. 2011-04-04T23:29:01.68 0.1 undecidable manual Pg 335 0.3112 0.015 100
IV.SIRI.HHN. 2011-04-04T23:29:01.32 0.3 undecidable manual Pg 32 0.0863 -0.102 77
IV.MMN.HHZ. 2011-04-04T23:29:01.46 0.3 undecidable manual Pg 147 0.259 -0.123 74
IV.MCEL.HHE. 2011-04-04T23:29:01.97 0.1 undecidable manual Pg 359 0.2158 0.44 93
IV.SALB.HHZ. 2011-04-04T23:29:01.87 0.1 undecidable manual Pg 119 0.473 -0.139 94
IV.FIR.HHZ. 2011-04-04T23:28:52.22 10.0 undecidable manual Pg 0 0 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SIRI.HHN. ML:0 3.0E-5 1.18 AML other m 2011-04-04T23:29:01.32
IV.SIRI.HHE. ML:0 3.5E-5 0.56 AML other m 2011-04-04T23:29:01.32
IV.MMN.HHN. ML:2.3 3.0E-5 0.12 AML other m 2011-04-04T23:29:01.46
IV.MMN.HHE. ML:2.3 2.0E-5 0.4 AML other m 2011-04-04T23:29:01.46
IV.SLCN.HHN. ML:2.8 8.0E-5 0.44 AML other m 2011-04-04T23:29:01.68
IV.SLCN.HHE. ML:2.8 9.5E-5 0.46 AML other m 2011-04-04T23:29:01.68
IV.SALB.HHN. ML:2.7 5.0E-5 0.52 AML other m 2011-04-04T23:29:01.87
IV.SALB.HHE. ML:2.7 7.5E-5 0.26 AML other m 2011-04-04T23:29:01.87
IV.BULG.HHN. ML:2.5 6.0E-5 0.68 AML other m 2011-04-04T23:29:01.89
IV.BULG.HHE. ML:2.5 3.0E-5 0.24 AML other m 2011-04-04T23:29:01.89
IV.MCEL.HHN. ML:2.7 8.5E-5 1.04 AML other m 2011-04-04T23:29:01.97
IV.MCEL.HHE. ML:2.7 4.0E-5 1.14 AML other m 2011-04-04T23:29:01.97
IV.CRAC.EHN. ML:2.8 5.0E-5 0.24 AML other m 2011-04-04T23:29:02.27
IV.CRAC.EHE. ML:2.8 0.00011 0.62 AML other m 2011-04-04T23:29:02.27
IV.ORI.HHN. ML:3.3 0.00019 0.08 AML other m 2011-04-04T23:29:02.78
IV.ORI.HHE. ML:3.3 0.0003 0.06 AML other m 2011-04-04T23:29:02.78
GE.MATE.HHE. ML:2.6 4.5E-5 0.5 AML other m 2011-04-04T23:29:03.02
IV.MCRV.HHN. ML:2.4 3.5E-5 0.2 AML other m 2011-04-04T23:29:03.10
IV.MCRV.HHE. ML:2.4 2.5E-5 0.22 AML other m 2011-04-04T23:29:03.10
IV.LTRZ.EHN. ML:2.5 4.0E-5 10.38 AML other m 2011-04-04T23:29:03.16
IV.LTRZ.EHE. ML:2.5 4.5E-5 10.72 AML other m 2011-04-04T23:29:03.16
IV.CAR1.HHN. ML:3 9.0E-5 0.34 AML other m 2011-04-04T23:29:03.34
IV.CAR1.HHE. ML:3 0.000125 0.56 AML other m 2011-04-04T23:29:03.34
IV.PIPA.HHN. ML:2.9 7.0E-5 0.44 AML other m 2011-04-04T23:29:04.15
IV.PIPA.HHE. ML:2.9 0.00011 0.2 AML other m 2011-04-04T23:29:04.15
IV.NOCI.HHN. ML:2.1 2.0E-5 0.22 AML other m 2011-04-04T23:29:04.46
IV.NOCI.HHE. ML:2.1 1.5E-5 0.3 AML other m 2011-04-04T23:29:04.46
IV.LADO.HHN. ML:2.9 0.00011 0.44 AML other m 2011-04-04T23:29:05.50
IV.LADO.HHE. ML:2.9 6.5E-5 0.34 AML other m 2011-04-04T23:29:05.50
MN.TIP.HHN. ML:2.7 4.0E-5 0.56 AML other m 2011-04-04T23:29:05.50
MN.TIP.HHE. ML:2.7 5.5E-5 0.32 AML other m 2011-04-04T23:29:05.50
IV.SERS.HHN. ML:2.8 7.5E-5 0.32 AML other m 2011-04-04T23:29:06.10
IV.SERS.HHE. ML:2.8 6.0E-5 0.28 AML other m 2011-04-04T23:29:06.10
IV.GRI.EHN. ML:3.1 0.00012 0.76 AML other m 2011-04-04T23:29:06.92
IV.GRI.EHE. ML:3.1 0.000125 12.08 AML other m 2011-04-04T23:29:06.92
IV.VAGA.HHN. ML:2.4 2.0E-5 1.1 AML other m 2011-04-04T23:29:08.66
IV.VAGA.HHE. ML:2.4 2.0E-5 3.22 AML other m 2011-04-04T23:29:08.66
IV.PLAC.HHN. ML:3.2 0.00011 0.9 AML other m 2011-04-04T23:29:09.02
IV.PLAC.HHE. ML:3.2 0.000155 0.5 AML other m 2011-04-04T23:29:09.02
IV.MSRU.HHN. ML:2.9 5.5E-5 0.8 AML other m 2011-04-04T23:29:09.34
IV.MSRU.HHE. ML:2.9 7.0E-5 0.56 AML other m 2011-04-04T23:29:09.34
MN.CEL.HHN. ML:2.8 4.5E-5 1.22 AML other m 2011-04-04T23:29:09.51
IV.MSCL.HHN. ML:3 7.5E-5 0.32 AML other m 2011-04-04T23:29:09.53
IV.MSCL.HHE. ML:3 7.5E-5 0.72 AML other m 2011-04-04T23:29:09.53
IV.MILZ.HHN. ML:2.8 5.0E-5 0.38 AML other m 2011-04-04T23:29:10.05
IV.MILZ.HHE. ML:2.8 6.0E-5 0.7 AML other m 2011-04-04T23:29:10.05
IV.SOI.EHN. ML:2.7 4.0E-5 1.34 AML other m 2011-04-04T23:29:11.30
IV.SOI.EHE. ML:2.7 2.5E-5 1.54 AML other m 2011-04-04T23:29:11.30
IV.IFIL.EHN. ML:0 4.5E-5 2.8 AML other m 2011-04-04T23:29:11.89
IV.IFIL.EHE. ML:0 7.5E-5 50.46 AML other m 2011-04-04T23:29:11.89
IV.MPAZ.HHN. ML:3 7.5E-5 0.28 AML other m 2011-04-04T23:29:12.32
IV.MPAZ.HHE. ML:3 5.5E-5 0.6 AML other m 2011-04-04T23:29:12.32
IV.RM32.EHN. ML:0 8.5E-5 1.8 AML other m 2011-04-04T23:29:25.96
IV.RM32.EHE. ML:0 7.5E-5 1.46 AML other m 2011-04-04T23:29:25.96
IV.MMGO.SHZ. ML:0 1.0E-5 0.16 AML other m 2011-04-04T23:29:27.34
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, 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, This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
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