Earthquake with magnitude of ML 4.0 on date 22-07-2007 and time 19:26:03 (Italy) in region 4 km SW Lecce nei Marsi (AQ)

A magnitude ML 4.0 earthquake occured in region: 4 km SW Lecce nei Marsi (AQ), on

  • 22-07-2007 17:26:03 (UTC)
  • 22-07-2007 19:26:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9, 13.67 at 16 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
Lecce nei Marsi AQ 4 1702 1702
Villavallelonga AQ 6 919 2621
Gioia dei Marsi AQ 6 1989 4610
Ortucchio AQ 6 1860 6470
Collelongo AQ 7 1233 7703
Bisegna AQ 8 223 7926
Ortona dei Marsi AQ 12 542 8468
San Benedetto dei Marsi AQ 12 3909 12377
Trasacco AQ 12 6246 18623
Pescina AQ 14 4133 22756
Villalago AQ 14 568 23324
Balsorano AQ 14 3569 26893
San Vincenzo Valle Roveto AQ 14 2347 29240
Pescasseroli AQ 15 2203 31443
Anversa degli Abruzzi AQ 15 341 31784
Civita d'Antino AQ 17 979 32763
Cocullo AQ 17 230 32993
Pescosolido FR 17 1555 34548
Scanno AQ 18 1847 36395
Luco dei Marsi AQ 18 6079 42474
Collarmele AQ 18 894 43368
Morino AQ 18 1448 44816
Campoli Appennino FR 19 1725 46541
Cerchio AQ 19 1635 48176
Opi AQ 19 420 48596

Municipalities with at least 50000 inhabitants

An earthquake occurred to
55 Km SE of L'Aquila (69753 inhabitants)
64 Km SW of Chieti (51815 inhabitants)
72 Km E of Tivoli (56533 inhabitants)
77 Km SW of Pescara (121014 inhabitants)
78 Km E of Velletri (53303 inhabitants)
79 Km SW of Montesilvano (53738 inhabitants)
79 Km E of Guidonia Montecelio (88673 inhabitants)
80 Km NE of Latina (125985 inhabitants)
84 Km S of Teramo (54892 inhabitants)
92 Km E of Aprilia (73446 inhabitants)
98 Km E of Roma (2864731 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 4.0 2007-07-22
17:26:03
41.91 13.67 16 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 642749
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2007-07-22 17:26:03 ± 0.06
Latitude 41.91 ± 0.00
Longitude 13.67 ± 0.01
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 642749

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 571
Semi-minor axis of confidence ellipse (meter) 55
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 50
Circular confidence region, given by single value of horizontal uncertainty (meter) 707.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43
Number of associated phases, regardless of their use for origin computation 60
Number of defining phases 51
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.59809
Number of stations at which the event was observed 45
Number of stations from which data was used for origin computation 37
Magnitude information

ML:4

Field Value
Value 4
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 642749
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 12:13:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MURB.HHZ. 2007-07-22T17:26:32.78 0.1 undecidable manual Pg 329 1.5981 0.884 52
IV.MCRV.HHZ. 2007-07-22T17:26:31.59 0.1 negative manual Pg 134 1.5873 -0.158 68
IV.CAFE.HHZ. 2007-07-22T17:26:30.32 0.6 undecidable manual Pg 126 1.4632 0.283 35
IV.RDP.BHZ. 2007-07-22T17:26:28.41 0.6 undecidable manual Sg 259 0.7258 0.787 18
IV.CESI.BHE. 2007-07-22T17:26:27.00 0.3 undecidable manual Pg 333 1.2366 0.804 48
IV.TRIV.HHN. 2007-07-22T17:26:26.51 0.1 undecidable manual Sg 102 0.6691 0.577 40
IV.TOLF.HHZ. 2007-07-22T17:26:26.86 0.3 undecidable manual Pg 278 1.2519 0.399 55
IV.CAMP.BHZ. 2007-07-22T17:26:25.25 1.0 undecidable manual Sg 343 0.6601 -0.417 10
IV.PSB1.HHZ. 2007-07-22T17:26:24.42 0.6 undecidable manual Pg 128 1.0909 0.713 34
IV.VENT.EHZ. 2007-07-22T17:26:23.66 0.1 undecidable manual Pg 190 1.1251 -0.638 72
IV.OFFI.HHZ. 2007-07-22T17:26:23.31 0.6 undecidable manual Pg 1 1.0297 0.645 36
IV.NRCA.SHZ. 2007-07-22T17:26:22.11 0.3 undecidable manual Pg 336 1.0153 -0.308 59
IV.MIDA.HHZ. 2007-07-22T17:26:21.41 0.1 undecidable manual Sg 121 0.5072 0.232 45
IV.ROM9.HHE. 2007-07-22T17:26:21.87 10.0 undecidable manual Pg 0 0 0
IV.CERT.HHZ. 2007-07-22T17:26:21.73 1.0 undecidable manual Sg 275 0.5144 0.343 11
IV.VCEL.EHZ. 2007-07-22T17:26:21.65 0.1 undecidable manual Sg 14 0.5054 0.543 43
IV.TRTR.HHZ. 2007-07-22T17:26:21.89 0.6 undecidable manual Pg 11 0.92 1.095 31
MN.AQU.HHZ. 2007-07-22T17:26:21.58 0.1 undecidable manual Sg 336 0.491 0.884 37
IV.SACR.HHZ. 2007-07-22T17:26:20.88 1.0 undecidable manual Pg 123 0.9236 0.019 22
IV.GIUL.BHN. 2007-07-22T17:26:20.47 0.1 undecidable manual Sg 222 0.4658 0.53 41
IV.MNS.BHZ. 2007-07-22T17:26:20.38 0.3 undecidable manual Pg 304 0.8768 0.321 61
IV.LNSS.BHZ. 2007-07-22T17:26:19.29 0.3 undecidable manual Pg 326 0.8391 -0.125 64
IV.CERA.HHZ. 2007-07-22T17:26:18.05 0.1 undecidable manual Sg 140 0.4011 -0.004 48
IV.RNI2.HHZ. 2007-07-22T17:26:18.42 0.6 undecidable manual Sg 119 0.411 0.081 24
IV.BSSO.HHZ. 2007-07-22T17:26:18.47 0.1 undecidable manual Pg 117 0.7761 0.139 87
IV.MODR.HHZ. 2007-07-22T17:26:17.75 0.1 undecidable manual Pg 168 0.7743 -0.551 80
IV.RDP.BHZ. 2007-07-22T17:26:17.38 0.1 undecidable manual Pg 259 0.7258 -0.098 89
IV.FRES.HHE. 2007-07-22T17:26:17.49 0.1 undecidable manual Pg 84 0.7446 -0.314 84
IV.FAGN.BHZ. 2007-07-22T17:26:17.18 0.1 undecidable manual Sg 350 0.366 0.148 48
IV.RFI.SHZ. 2007-07-22T17:26:17.14 0.3 undecidable manual Pg 159 0.6475 0.996 50
IV.SGG.BHE. 2007-07-22T17:26:17.93 0.3 undecidable manual Pg 134 0.7401 0.211 64
IV.TERO.HHZ. 2007-07-22T17:26:16.69 0.1 undecidable manual Pg 356 0.7195 -0.671 76
IV.TDS.SHZ. 2007-07-22T17:26:16.03 10.0 undecidable manual Pg 0 0 0
IV.TRIV.HHN. 2007-07-22T17:26:16.44 0.1 undecidable manual Pg 102 0.6691 -0.061 90
IV.CAMP.BHZ. 2007-07-22T17:26:15.92 0.6 undecidable manual Pg 343 0.6601 -0.426 42
IV.VAGA.HHZ. 2007-07-22T17:26:15.66 0.1 undecidable manual Pg 139 0.6448 -0.435 84
IV.CAFR.HHZ. 2007-07-22T17:26:15.24 0.1 undecidable manual Pg 57 0.5963 -0.021 92
IV.FIAM.HHZ. 2007-07-22T17:26:14.03 0.3 undecidable manual Pg 312 0.5486 -0.418 64
IV.MIDA.HHZ. 2007-07-22T17:26:13.47 0.1 positive manual Pg 121 0.5072 -0.288 89
IV.CERT.HHZ. 2007-07-22T17:26:13.48 0.1 negative manual Pg 275 0.5144 -0.397 87
IV.VCEL.EHZ. 2007-07-22T17:26:13.64 0.1 positive manual Pg 14 0.5054 -0.074 93
MN.AQU.HHZ. 2007-07-22T17:26:12.97 0.1 undecidable manual Pg 336 0.491 -0.508 85
IV.POFI.HHZ. 2007-07-22T17:26:12.29 0.1 undecidable manual Sg 171 0.1898 0.3 47
IV.RNI2.HHZ. 2007-07-22T17:26:12.30 0.1 positive manual Pg 119 0.411 0.183 93
IV.INTR.HHZ. 2007-07-22T17:26:12.26 0.1 undecidable manual Sg 58 0.2032 -0.098 49
IV.GIUL.BHN. 2007-07-22T17:26:12.89 0.1 positive manual Pg 222 0.4658 -0.15 93
IV.FAGN.BHZ. 2007-07-22T17:26:11.05 0.1 negative manual Pg 350 0.366 -0.311 91
IV.CERA.HHZ. 2007-07-22T17:26:11.66 0.1 positive manual Pg 140 0.4011 -0.293 92
IV.VVLD.BHZ. 2007-07-22T17:26:09.14 0.1 undecidable manual Sg 226 0.0504 0.145 51
.PTQR.SHZ. 2007-07-22T17:26:09.18 0.1 negative manual Pg 300 0.2329 0.043 99
IV.POFI.HHZ. 2007-07-22T17:26:08.47 0.1 positive manual Pg 171 0.1898 0.018 100
IV.INTR.HHZ. 2007-07-22T17:26:08.62 0.1 positive manual Pg 58 0.2032 -0.044 99
IV.VVLD.BHZ. 2007-07-22T17:26:06.91 0.1 negative manual Pg 226 0.0504 0.188 100
IV.ECNV.BHE. 2007-07-22T17:25:34.18 10.0 undecidable manual Sg 0 0 0
IV.MNO.SHZ. 2007-07-22T17:25:32.45 10.0 undecidable manual Pg 0 0 0
IV.MMME.BHZ. 2007-07-22T17:25:30.70 10.0 undecidable manual Pg 0 0 0
IV.ECNV.BHE. 2007-07-22T17:25:30.79 10.0 undecidable manual Pg 0 0 0
IV.PTS.SHZ. 2007-07-22T17:25:26.20 10.0 undecidable manual Pg 0 0 0
IV.GALF.HHZ. 2007-07-22T17:25:24.62 10.0 undecidable manual Pg 0 0 0
IV.ORI.EHZ. 2007-07-22T17:25:23.73 10.0 undecidable manual Pg 0 0 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.BHN. ML:4.6 0.412 0.44 AML other m 2007-07-22T17:26:06.91
IV.VVLD.BHE. ML:4.6 0.412 0.44 AML other m 2007-07-22T17:26:06.91
IV.POFI.HHN. ML:3.6 0.025 0.44 AML other m 2007-07-22T17:26:08.47
IV.POFI.HHE. ML:3.6 0.025 0.44 AML other m 2007-07-22T17:26:08.47
IV.INTR.HHN. ML:4 0.054 0.45 AML other m 2007-07-22T17:26:08.62
IV.INTR.HHE. ML:4 0.054 0.45 AML other m 2007-07-22T17:26:08.62
IV.FAGN.BHN. ML:4.1 0.045375 0.36 AML other m 2007-07-22T17:26:11.05
IV.FAGN.BHE. ML:4.1 0.033285 0.4 AML other m 2007-07-22T17:26:11.05
IV.CERA.HHN. ML:3.8 0.015275 0.4 AML other m 2007-07-22T17:26:11.66
IV.CERA.HHE. ML:3.8 0.018295 0.38 AML other m 2007-07-22T17:26:11.66
IV.RNI2.HHN. ML:3.7 0.013965 0.32 AML other m 2007-07-22T17:26:12.30
IV.RNI2.HHE. ML:3.7 0.015465 0.44 AML other m 2007-07-22T17:26:12.30
IV.GIUL.BHN. ML:0 0.006505 0.36 AML other m 2007-07-22T17:26:12.89
IV.GIUL.BHE. ML:0 0.00555 0.2 AML other m 2007-07-22T17:26:12.89
MN.AQU.HHN. ML:0 0.008565 0.4 AML other m 2007-07-22T17:26:12.97
MN.AQU.HHE. ML:0 0.008265 0.46 AML other m 2007-07-22T17:26:12.97
IV.MIDA.HHN. ML:0 0.008585 0.38 AML other m 2007-07-22T17:26:13.47
IV.MIDA.HHE. ML:0 0.01068 0.3 AML other m 2007-07-22T17:26:13.47
IV.CERT.HHN. ML:0 0.0077 0.32 AML other m 2007-07-22T17:26:13.48
IV.CERT.HHE. ML:0 0.008345 0.38 AML other m 2007-07-22T17:26:13.48
IV.VCEL.EHN. ML:0 0.01423 0.44 AML other m 2007-07-22T17:26:13.64
IV.VCEL.EHE. ML:0 0.01826 0.4 AML other m 2007-07-22T17:26:13.64
IV.FIAM.HHN. ML:0 0.00599 0.86 AML other m 2007-07-22T17:26:14.03
IV.FIAM.HHE. ML:0 0.00888 0.4 AML other m 2007-07-22T17:26:14.03
IV.CAFR.HHN. ML:0 0.02109 0.34 AML other m 2007-07-22T17:26:15.24
IV.CAFR.HHE. ML:0 0.01214 0.4 AML other m 2007-07-22T17:26:15.24
IV.VAGA.HHN. ML:0 0.00707 0.36 AML other m 2007-07-22T17:26:15.66
IV.VAGA.HHE. ML:0 0.003095 0.34 AML other m 2007-07-22T17:26:15.66
IV.CAMP.BHN. ML:0 0.001055 0.64 AML other m 2007-07-22T17:26:15.92
IV.CAMP.BHE. ML:0 0.000635 0.64 AML other m 2007-07-22T17:26:15.92
IV.TRIV.HHN. ML:0 0.00209 0.54 AML other m 2007-07-22T17:26:16.44
IV.TRIV.HHE. ML:0 0.002615 0.86 AML other m 2007-07-22T17:26:16.44
IV.TERO.HHN. ML:0 0.005865 0.7 AML other m 2007-07-22T17:26:16.69
IV.TERO.HHE. ML:0 0.005795 0.68 AML other m 2007-07-22T17:26:16.69
IV.RFI.SHZ. ML:0 0.00041 0.44 AML other m 2007-07-22T17:26:17.14
IV.RDP.BHN. ML:0 0.0191 0.56 AML other m 2007-07-22T17:26:17.38
IV.RDP.BHE. ML:0 0.013005 0.68 AML other m 2007-07-22T17:26:17.38
IV.FRES.HHN. ML:0 0.002355 0.96 AML other m 2007-07-22T17:26:17.49
IV.FRES.HHE. ML:0 0.00444 0.72 AML other m 2007-07-22T17:26:17.49
IV.MODR.HHN. ML:0 0.003855 0.64 AML other m 2007-07-22T17:26:17.75
IV.MODR.HHE. ML:0 0.004165 0.56 AML other m 2007-07-22T17:26:17.75
IV.BSSO.HHN. ML:0 0.00304 1.66 AML other m 2007-07-22T17:26:18.47
IV.BSSO.HHE. ML:0 0.002215 1.56 AML other m 2007-07-22T17:26:18.47
IV.LNSS.BHN. ML:0 0.011875 0.56 AML other m 2007-07-22T17:26:19.29
IV.LNSS.BHE. ML:0 0.010705 0.76 AML other m 2007-07-22T17:26:19.29
IV.MNS.BHN. ML:0 0.003445 0.32 AML other m 2007-07-22T17:26:20.38
IV.MNS.BHE. ML:0 0.00413 0.4 AML other m 2007-07-22T17:26:20.38
IV.SACR.HHN. ML:0 0.00129 0.86 AML other m 2007-07-22T17:26:20.88
IV.SACR.HHE. ML:0 0.001185 0.7 AML other m 2007-07-22T17:26:20.88
IV.ROM9.HHN. ML:0 0.00938 0.76 AML other m 2007-07-22T17:26:21.87
IV.ROM9.HHE. ML:0 0.00711 0.7 AML other m 2007-07-22T17:26:21.87
IV.TRTR.HHN. ML:0 0.005925 0.46 AML other m 2007-07-22T17:26:21.89
IV.TRTR.HHE. ML:0 0.007475 0.64 AML other m 2007-07-22T17:26:21.89
IV.OFFI.HHN. ML:0 0.011075 0.7 AML other m 2007-07-22T17:26:23.31
IV.OFFI.HHE. ML:0 0.008375 0.64 AML other m 2007-07-22T17:26:23.31
IV.VENT.EHN. ML:0 0.002 0.76 AML other m 2007-07-22T17:26:23.66
IV.VENT.EHE. ML:0 0.00193 0.72 AML other m 2007-07-22T17:26:23.66
IV.PSB1.HHN. ML:0 0.00142 0.92 AML other m 2007-07-22T17:26:24.42
IV.PSB1.HHE. ML:0 0.001405 0.84 AML other m 2007-07-22T17:26:24.42
IV.TOLF.HHN. ML:0 0.0008 0.38 AML other m 2007-07-22T17:26:26.86
IV.TOLF.HHE. ML:0 0.000875 0.54 AML other m 2007-07-22T17:26:26.86
IV.CESI.BHN. ML:0 0.000955 0.56 AML other m 2007-07-22T17:26:27.00
IV.CESI.BHE. ML:0 0.001505 0.36 AML other m 2007-07-22T17:26:27.00
IV.CAFE.HHN. ML:0 0.00062 0.52 AML other m 2007-07-22T17:26:30.32
IV.CAFE.HHE. ML:0 0.00079 0.5 AML other m 2007-07-22T17:26:30.32
IV.MCRV.HHN. ML:0 0.001765 1.24 AML other m 2007-07-22T17:26:31.59
IV.MCRV.HHE. ML:0 0.000395 0.46 AML other m 2007-07-22T17:26:31.59
IV.MURB.HHN. ML:0 0.00273 0.88 AML other m 2007-07-22T17:26:32.78
IV.MURB.HHE. ML:0 0.00249 0.42 AML other m 2007-07-22T17:26:32.78
IV.ORI.EHZ. Md:0 9 END duration s
IV.PTS.SHZ. Md:0 8 END duration s
IV.MMME.BHZ. Md:0 11 END duration s
IV.MNO.SHZ. Md:0 20 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.
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download