Earthquake with magnitude of ML 1.0 on date 20-02-2012 and time 09:21:54 (Italy) in region 9 km NW Frascineto (CS)

A magnitude ML 1.0 earthquake occured in region: 9 km NW Frascineto (CS), on

  • 20-02-2012 08:21:54 (UTC)
  • 20-02-2012 09:21:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 39.916, 16.225 at 6 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
San Lorenzo Bellizzi CS 9 644 644
Frascineto CS 9 2154 2798
Terranova di Pollino PZ 9 1208 4006
Morano Calabro CS 11 4576 8582
Castrovillari CS 12 22240 30822
Civita CS 12 902 31724
San Basile CS 13 1055 32779
Viggianello PZ 13 3025 35804
San Severino Lucano PZ 14 1563 37367
Alessandria del Carretto CS 14 462 37829
Cerchiara di Calabria CS 15 2385 40214
San Costantino Albanese PZ 15 729 40943
San Paolo Albanese PZ 16 294 41237
Rotonda PZ 17 3494 44731
Saracena CS 17 3828 48559
Cassano all'Ionio CS 17 18495 67054
Francavilla Marittima CS 18 2910 69964
Plataci CS 18 739 70703
Cersosimo PZ 18 656 71359
Francavilla in Sinni PZ 19 4215 75574

Municipalities with at least 50000 inhabitants

An earthquake occurred to
69 Km N of Cosenza (67546 inhabitants)
88 Km SE of Potenza (67122 inhabitants)
90 Km SW of Matera (60436 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 3 days preceding this event

Earthquakes of the 3 days preceding this event

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 90 days preceding this event

Earthquakes of the 90 days preceding this event

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 from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

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
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 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
Md 1.7
ML 1.0
2012-02-20
08:21:54
39.916 16.225 7 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 1342249
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-02-20 08:21:54 ± 0.57
Latitude 39.9160 ± 0.0171
Longitude 16.2250 ± 0.0246
Depth (km) 7 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1342249

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2526
Semi-minor axis of confidence ellipse (meter) 1263
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 308
Circular confidence region, given by single value of horizontal uncertainty (meter) 2832
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 284
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.51
Epicentral distance of station closest to the epicenter (degree) 0.1268
Epicentral distance of station farthest from the epicenter (degree) 0.32286
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 1342249
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 02:45:24

Md:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1342249
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 02:45:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.CUC.HHN. 2012-02-20T08:22:07.69 0.6 undecidable manual Sg 284 0.3229 0.346 46
IV.SCHR.EHZ. 2012-02-20T08:22:06.50 0.6 undecidable manual Sg 338 0.3058 -0.175 48
MN.CUC.HHN. 2012-02-20T08:22:02.91 0.6 undecidable manual Pg 284 0.3229 0.912 38
IV.MMN.HHZ. 2012-02-20T08:22:02.21 0.6 undecidable manual Sg 262 0.1817 0.179 49
IV.SCHR.EHZ. 2012-02-20T08:22:01.72 0.3 undecidable manual Pg 338 0.3058 0.109 73
IV.T0711.EHE. 2012-02-20T08:21:59.68 0.3 undecidable manual Sg 279 0.1268 -0.379 71
IV.MMN.HHZ. 2012-02-20T08:21:58.58 0.6 undecidable manual Pg 262 0.1817 -0.351 47
IV.T0711.EHE. 2012-02-20T08:21:57.64 0.1 undecidable manual Pg 279 0.1268 -0.151 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMN.HHN. ML:1.2 0.00012 0.22 AML other m 2012-02-20T08:21:58.58
IV.MMN.HHE. ML:1.2 0.00012 0.22 AML other m 2012-02-20T08:21:58.58
IV.SCHR.EHN. ML:0.9 4.5E-5 1.68 AML other m 2012-02-20T08:22:01.72
IV.SCHR.EHE. ML:0.9 3.0E-5 2.9 AML other m 2012-02-20T08:22:01.72
MN.CUC.HHN. Md:1.6 15.1 END duration s
MN.CUC.HHE. ML:1 5.0E-5 1.22 AML other m 2012-02-20T08:22:02.91
IV.T0711.EHE. Md:1.4 13.6 END duration s
IV.MMN.HHZ. Md:1.6 16.4 END duration s
IV.SCHR.EHZ. Md:1.9 22.6 END duration s
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

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