Official address: http://terremoti.ingv.it
Earthquake with magnitude of ML 3.9 on date 06-09-2011 and time 16:23:47 (UTC) in region Costa Occidentale Peloponneso (GRECIA)
A magnitude ML 3.9 earthquake occured in region: Costa Occidentale Peloponneso (GRECIA), on
- 06-09-2011 16:23:47 (UTC)
- 06-09-2011 18:23:47 (UTC +02:00) Italian time
- 06-09-2011 19:23:47 (UTC +03:00) local time in the region of the earthquake (Europe/Athens)
and geographic coordinates (lat, lon) 37.52, 21.02 at 2 km depth.
The earthquake was located by: CSEM.
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.
Display location by
GeoHack
GoogleMap
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Municipalities within 20 km from the epicenter
No Italian municipalities within 20 km distance.
Municipalities with at least 50000 inhabitants
No Italian municipalities within 100 km from the epicenter with at least 50000 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)
This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. 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
This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, 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
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
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
This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Not available maps for this sismic event.
Felt maps
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 |
|---|---|---|---|---|---|---|---|---|
|
Bulletin Rev1000 |
ML 3.9 | 2011-09-06 16:23:47 |
37.52 | 21.02 | 2 | 2013-01-06 01:21:32 |
CSEM | 1282139 |
Preferred location and magnitude until now.
Origin information
Origin
| Field | Value |
|---|---|
| Time (UTC) | 2011-09-06 16:23:47 |
| Latitude | 37.52 |
| Longitude | 21.02 |
| Depth (km) | 2 (from location) |
| Evaluation mode of Origin | manual |
| Evaluation status of Origin | reviewed |
| Version | 1000 -> CSEM |
| Event type | earthquake |
| Origin ID | 1282139 |
Uncertainty
| Field | Value |
|---|---|
| Preferred uncertainty description | |
| Semi-major axis of confidence ellipse (meter) | |
| Semi-minor axis of confidence ellipse (meter) | |
| Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) | |
| Circular confidence region, given by single value of horizontal uncertainty (meter) | |
| Confidence level of the uncertainty (%) | 68 |
Quality
| Field | Value |
|---|---|
| Largest azimuthal gap in station distribution as seen from epicenter (degree) | |
| Number of associated phases, regardless of their use for origin computation | 33 |
| Number of defining phases | 19 |
| RMS of the travel time residuals of the arrivals used for the origin computation (sec) | |
| Epicentral distance of station closest to the epicenter (degree) | 0 |
| Epicentral distance of station farthest from the epicenter (degree) | 0 |
| Number of stations at which the event was observed | 28 |
| Number of stations from which data was used for origin computation | 16 |
Magnitude information
ML:3.9
| Field | Value |
|---|---|
| Value | 3.9 |
| Uncertainty | |
| Num. used stations | |
| Type of magnitude | ML |
| Reference to an origin | 1282139 |
| Agency | INGV |
| Autore | CSEM |
| Time of creation (UTC) | 2013-01-06 01:21:32 |
Picking and Arrival
| SCNL | Time | Uncertainty | Polarity | Evaluation_mode | Phase | Azimuth | Distance | Takeoff_angle | Residual | Weight |
|---|---|---|---|---|---|---|---|---|---|---|
| IV.HVZN.HHZ. | 2011-09-06T16:25:53.90 | 0.6 | undecidable | manual | Sg | 0 | 0 | 0 | ||
| IV.HMDC.HHZ. | 2011-09-06T16:25:52.40 | 0.6 | undecidable | manual | Sg | 0 | 0 | 0 | ||
| IV.MCSR.HHZ. | 2011-09-06T16:25:45.80 | 0.6 | undecidable | manual | Sg | 0 | 0 | 0 | ||
| IV.CDRU.HHN. | 2011-09-06T16:25:07.73 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.SLCN.HHZ. | 2011-09-06T16:25:05.50 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.CMPR.HHN. | 2011-09-06T16:25:05.80 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.MESG.HHN. | 2011-09-06T16:25:04.13 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.BULG.HHN. | 2011-09-06T16:25:02.58 | 0.3 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.MTSN.HHZ. | 2011-09-06T16:25:02.40 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.MGR.HHZ. | 2011-09-06T16:25:02.82 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.MCEL.HHE. | 2011-09-06T16:25:01.81 | 0.3 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| MN.CUC.HHZ. | 2011-09-06T16:25:00.17 | 10.0 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.HVZN.HHZ. | 2011-09-06T16:24:59.64 | 0.6 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.MUCR.HHZ. | 2011-09-06T16:24:59.13 | 0.3 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.HMDC.HHZ. | 2011-09-06T16:24:59.39 | 0.6 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.HLNI.HHZ. | 2011-09-06T16:24:57.33 | 0.1 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.CRAC.EHN. | 2011-09-06T16:24:56.50 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.NOV.HHZ. | 2011-09-06T16:24:56.50 | 0.6 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.MCSR.HHZ. | 2011-09-06T16:24:55.51 | 0.6 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.HAVL.HHE. | 2011-09-06T16:24:55.99 | 0.1 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.NOCI.HHE. | 2011-09-06T16:24:54.80 | 0.3 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.SALB.HHZ. | 2011-09-06T16:24:53.19 | 0.6 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.CAR1.HHZ. | 2011-09-06T16:24:50.12 | 0.3 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.PIPA.HHN. | 2011-09-06T16:24:44.66 | 0.1 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| MN.TIP.HHZ. | 2011-09-06T16:24:43.28 | 0.1 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.SERS.HHZ. | 2011-09-06T16:24:42.59 | 0.1 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.OFFI.HHN. | 2011-09-06T16:24:40.75 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.PTF.SHE. | 2011-09-06T16:24:38.34 | 10.0 | undecidable | manual | Sg | 0 | 0 | 0 | ||
| IV.SCTE.HHZ. | 2011-09-06T16:24:36.50 | 0.6 | undecidable | manual | Pn | 0 | 0 | 0 | ||
| IV.PTF.SHE. | 2011-09-06T16:24:35.79 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.GROG.HHZ. | 2011-09-06T16:24:32.15 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 | ||
| IV.MNO.SHN. | 2011-09-06T16:24:30.36 | 10.0 | undecidable | manual | Sg | 0 | 0 | 0 | ||
| IV.MNO.SHN. | 2011-09-06T16:24:26.62 | 10.0 | undecidable | manual | Pg | 0 | 0 | 0 |
Station Magnitude and Amplitude
| SCNL | mag | Generic_amplitude | Period | Type | Category | Unit | Time_window_reference |
|---|---|---|---|---|---|---|---|
| IV.SCTE.HHN. | ML:0 | 0.00039 | 0.66 | AML | other | m | 2011-09-06T16:24:36.50 |
| IV.SCTE.HHE. | ML:0 | 0.00023 | 1.24 | AML | other | m | 2011-09-06T16:24:36.50 |
| IV.SERS.HHN. | ML:0 | 0.000105 | 0.5 | AML | other | m | 2011-09-06T16:24:42.59 |
| IV.SERS.HHE. | ML:0 | 0.000175 | 0.4 | AML | other | m | 2011-09-06T16:24:42.59 |
| MN.TIP.HHN. | ML:0 | 0.000115 | 0.96 | AML | other | m | 2011-09-06T16:24:43.28 |
| MN.TIP.HHE. | ML:0 | 9.5E-5 | 0.62 | AML | other | m | 2011-09-06T16:24:43.28 |
| IV.PIPA.HHN. | ML:0 | 0.000215 | 1.24 | AML | other | m | 2011-09-06T16:24:44.66 |
| IV.PIPA.HHE. | ML:0 | 0.00024 | 0.76 | AML | other | m | 2011-09-06T16:24:44.66 |
| IV.CAR1.HHN. | ML:0 | 0.000385 | 0.66 | AML | other | m | 2011-09-06T16:24:50.12 |
| IV.CAR1.HHE. | ML:0 | 0.000335 | 0.76 | AML | other | m | 2011-09-06T16:24:50.12 |
| IV.SALB.HHN. | ML:0 | 0.00013 | 0.8 | AML | other | m | 2011-09-06T16:24:53.19 |
| IV.SALB.HHE. | ML:0 | 0.000155 | 0.36 | AML | other | m | 2011-09-06T16:24:53.19 |
| IV.NOCI.HHN. | ML:0 | 0.000555 | 0.64 | AML | other | m | 2011-09-06T16:24:54.80 |
| IV.NOCI.HHE. | ML:0 | 0.00039 | 0.74 | AML | other | m | 2011-09-06T16:24:54.80 |
| IV.MCSR.HHN. | ML:0 | 0.000365 | 0.46 | AML | other | m | 2011-09-06T16:24:55.51 |
| IV.MCSR.HHE. | ML:0 | 0.000385 | 0.46 | AML | other | m | 2011-09-06T16:24:55.51 |
| IV.HAVL.HHN. | ML:0 | 0.000345 | 0.38 | AML | other | m | 2011-09-06T16:24:55.99 |
| IV.HAVL.HHE. | Md:0 | 38.1 | END | duration | s | ||
| IV.NOV.HHN. | ML:0 | 0.00023 | 0.86 | AML | other | m | 2011-09-06T16:24:56.50 |
| IV.NOV.HHE. | ML:0 | 0.000365 | 0.68 | AML | other | m | 2011-09-06T16:24:56.50 |
| IV.CRAC.EHN. | ML:0 | 0.000455 | 0.1 | AML | other | m | 2011-09-06T16:24:56.50 |
| IV.CRAC.EHE. | ML:0 | 0.00061 | 1.1 | AML | other | m | 2011-09-06T16:24:56.50 |
| IV.HLNI.HHN. | ML:0 | 0.000315 | 0.46 | AML | other | m | 2011-09-06T16:24:57.33 |
| IV.HLNI.HHE. | ML:0 | 0.000365 | 0.58 | AML | other | m | 2011-09-06T16:24:57.33 |
| IV.MUCR.HHN. | ML:0 | 0.000215 | 0.48 | AML | other | m | 2011-09-06T16:24:59.13 |
| IV.MUCR.HHE. | ML:0 | 0.000155 | 0.74 | AML | other | m | 2011-09-06T16:24:59.13 |
| IV.HMDC.HHN. | ML:0 | 0.00045 | 0.52 | AML | other | m | 2011-09-06T16:24:59.39 |
| IV.HMDC.HHE. | ML:0 | 0.000415 | 0.64 | AML | other | m | 2011-09-06T16:24:59.39 |
| IV.HVZN.HHN. | ML:0 | 0.00124 | 0.44 | AML | other | m | 2011-09-06T16:24:59.64 |
| IV.HVZN.HHE. | ML:0 | 0.001115 | 0.52 | AML | other | m | 2011-09-06T16:24:59.64 |
| MN.CUC.HHN. | ML:0 | 0.000105 | 0.58 | AML | other | m | 2011-09-06T16:25:00.17 |
| MN.CUC.HHE. | ML:0 | 0.00012 | 0.56 | AML | other | m | 2011-09-06T16:25:00.17 |
| IV.MCEL.HHN. | ML:0 | 0.00019 | 0.76 | AML | other | m | 2011-09-06T16:25:01.81 |
| IV.MCEL.HHE. | ML:0 | 0.000175 | 0.4 | AML | other | m | 2011-09-06T16:25:01.81 |
| IV.MTSN.HHN. | ML:0 | 0.000195 | 0.56 | AML | other | m | 2011-09-06T16:25:02.40 |
| IV.MTSN.HHE. | ML:0 | 0.00013 | 1.16 | AML | other | m | 2011-09-06T16:25:02.40 |
| IV.BULG.HHN. | ML:0 | 0.00025 | 0.4 | AML | other | m | 2011-09-06T16:25:02.58 |
| IV.BULG.HHE. | ML:0 | 0.000135 | 0.4 | AML | other | m | 2011-09-06T16:25:02.58 |
| IV.MGR.HHN. | ML:0 | 9.5E-5 | 0.36 | AML | other | m | 2011-09-06T16:25:02.82 |
| IV.MGR.HHE. | ML:0 | 9.0E-5 | 0.38 | AML | other | m | 2011-09-06T16:25:02.82 |
| IV.SLCN.HHN. | ML:0 | 0.000305 | 0.46 | AML | other | m | 2011-09-06T16:25:05.50 |
| IV.SLCN.HHE. | ML:0 | 0.00026 | 0.62 | AML | other | m | 2011-09-06T16:25:05.50 |
| IV.CMPR.HHN. | Md:0 | 49 | END | duration | s | ||
| IV.CMPR.HHE. | ML:0 | 9.0E-5 | 1.12 | AML | other | m | 2011-09-06T16:25:05.80 |
| IV.CDRU.HHN. | ML:0 | 5.5E-5 | 0.64 | AML | other | m | 2011-09-06T16:25:07.73 |
| IV.CDRU.HHE. | ML:0 | 8.0E-5 | 0.34 | AML | other | m | 2011-09-06T16:25:07.73 |
| IV.GROG.HHZ. | Md:0 | 11 | END | duration | s | ||
| IV.PTF.SHE. | Md:0 | 32 | END | duration | s | ||
| IV.SCTE.HHZ. | Md:0 | 99 | END | duration | s | ||
| IV.OFFI.HHN. | Md:0 | 8 | END | duration | s | ||
| IV.MCSR.HHZ. | Md:0 | 39 | END | duration | s | ||
| IV.NOV.HHZ. | Md:0 | 84.2 | END | duration | s | ||
| IV.HLNI.HHZ. | Md:0 | 37.3 | END | duration | s | ||
| IV.MUCR.HHZ. | Md:0 | 23.9 | END | duration | s | ||
| IV.HMDC.HHZ. | Md:0 | 37.2 | END | duration | s | ||
| IV.HVZN.HHZ. | Md:0 | 21.4 | END | duration | s | ||
| IV.MGR.HHZ. | Md:0 | 19 | END | duration | s | ||
| IV.MESG.HHN. | Md:0 | 12 | END | duration | s | ||
| IV.SLCN.HHZ. | Md:0 | 33 | END | duration | s |
TDMT - Time Domain Moment Tensor
Not available TDMT solution for this seismic event.
Focal Mechanism in the area
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.