Earthquake with magnitude of Mwp 6.0 on date 18-09-2015 and time 15:59:41 (UTC) in region Northern Mid Atlantic Ridge [Sea]

A magnitude Mwp 6.0 earthquake occured in region: Northern Mid Atlantic Ridge [Sea], on

  • 18-09-2015 15:59:41 (UTC)
  • 18-09-2015 17:59:41 (UTC +02:00) Italian time
  • 18-09-2015 12:59:41 (UTC -03:00) local time in the region of the earthquake (America/Cayenne)

and geographic coordinates (lat, lon) 15.19, -45.94 at 1 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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

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)

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 100 mb 5.4
Mwp 6.0

Mwpd 6.1
2015-09-18
15:59:41
15.19 -45.94 1 2015-09-18
20:58:01
Sala Sismica INGV-Roma 21454211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-09-18 15:59:41
Latitude 15.19
Longitude -45.94
Depth (km) 1 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 21454211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 18470
Semi-minor axis of confidence ellipse (meter) 5030
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 173
Circular confidence region, given by single value of horizontal uncertainty (meter) 14972.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 32.2646
Number of associated phases, regardless of their use for origin computation 89
Number of defining phases 89
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.08543
Epicentral distance of station closest to the epicenter (degree) 13.35491
Epicentral distance of station farthest from the epicenter (degree) 93.0958
Number of stations at which the event was observed 89
Number of stations from which data was used for origin computation 89
Magnitudes information

Mwpd:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 25
Type of magnitude Mwpd
Reference to an origin 21454211
Agency INGV
Autore Auto added
Time of creation (UTC) 2015-09-18 20:58:03

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 29
Type of magnitude Mwp
Reference to an origin 21454211
Agency INGV
Autore Auto added
Time of creation (UTC) 2015-09-18 20:58:03

mb:5.4

Field Value
Value 5.4
Uncertainty 0.2
Num. used stations 80
Type of magnitude mb
Reference to an origin 21454211
Agency INGV
Autore Auto added
Time of creation (UTC) 2015-09-18 20:58:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.DSB.BHZ. 2015-09-18T16:15:37.90 10.0 negative automatic S 30 49.0671 4.49147 0
IU.TIXI.BHZ.00 2015-09-18T16:12:57.07 10.0 positive automatic P 2 93.0958 1.36514 0.0707507
GE.SNAA.BHZ. 2015-09-18T16:12:48.41 10.0 positive automatic P 168 91.5565 -0.320088 0.0781791
KZ.ABKAR.BHZ. 2015-09-18T16:12:34.65 10.0 positive automatic P 39 88.4981 0.290007 0.104672
IU.PMSA.BHZ.00 2015-09-18T16:12:00.92 10.0 positive automatic P 188 81.148 3.60953 0.0535382
GT.BOSA.BHZ.00 2015-09-18T16:12:00.15 10.0 positive automatic P 123 81.5149 0.681129 0.153813
IU.COLA.BHZ.00 2015-09-18T16:11:58.87 10.0 negative automatic P 335 81.214 1.18177 0.152919
IU.HRV.BHZ.00 2015-09-18T16:11:58.42 10.0 positive automatic S 326 35.0526 -8.09184 0
IU.GNI.BHZ.00 2015-09-18T16:11:56.47 10.0 positive automatic P 51 80.7801 0.849777 0.156597
GT.LBTB.BHZ.00 2015-09-18T16:11:55.10 10.0 negative automatic P 119 80.4378 1.40222 0.168916
IU.LSZ.BHZ.00 2015-09-18T16:11:49.27 10.0 negative automatic P 109 79.3086 1.67746 0.181499
CN.INK.BHZ. 2015-09-18T16:11:23.60 10.0 negative automatic P 338 75.0101 0.362343 0.205113
GE.EIL.BHZ. 2015-09-18T16:11:22.30 10.0 positive automatic P 63 74.7833 0.339729 0.207308
BK.WDC.BHZ.00 2015-09-18T16:10:54.80 10.0 positive automatic P 308 70.0956 0.79386 0.2553
BK.HUMO.BHZ.00 2015-09-18T16:10:54.87 10.0 negative automatic P 310 70.2986 -0.42095 0.267664
IU.KEV.BHZ.00 2015-09-18T16:10:53.87 10.0 positive automatic P 21 69.887 1.18019 0.263275
IU.KBS.BHZ.00 2015-09-18T16:10:49.52 10.0 positive automatic P 10 69.1516 1.38168 0.0626468
HL.ARG.HHZ. 2015-09-18T16:10:42.58 10.0 positive automatic P 57 68.3678 -0.685443 0.26392
US.HAWA.BHZ.00 2015-09-18T16:10:41.13 10.0 negative automatic P 314 67.7969 1.40875 0
GE.VSU.BHZ. 2015-09-18T16:10:40.85 10.0 positive automatic P 33 68.0552 -0.446649 0.1404
GE.KARP.BHZ. 2015-09-18T16:10:38.30 10.0 positive automatic P 57 67.629 -0.391341 0.276544
CN.EUNU.BHZ. 2015-09-18T16:10:37.88 10.0 positive automatic P 353 67.3552 0.906641 0.320503
DK.NOR.BHZ. 2015-09-18T16:10:37.60 10.0 positive automatic P 4 67.5282 -0.360487 0.290004
US.WVOR.BHZ.00 2015-09-18T16:10:36.48 10.0 positive automatic P 310 67.1202 0.872798 0.301456
HL.RDO.HHZ. 2015-09-18T16:10:29.87 10.0 positive automatic P 51 66.2137 0.26923 0.16058
UW.BRAN.BHZ. 2015-09-18T16:10:29.93 10.0 negative automatic P 314 66.1889 0.307328 0.319977
US.TPNV.BHZ.00 2015-09-18T16:10:25.50 10.0 positive automatic P 304 65.3223 1.39518 0.338752
PL.KWP.BHZ. 2015-09-18T16:10:20.36 10.0 positive automatic P 42 64.7053 0.46135 0.0662092
MN.VTS.BHZ. 2015-09-18T16:10:19.32 10.0 positive automatic P 50 64.537 0.344643 0.357539
NN.PRN.HHZ. 2015-09-18T16:10:19.40 10.0 positive automatic P 305 64.3644 1.5539 0.343135
HT.AGG.HHZ. 2015-09-18T16:10:14.02 10.0 positive automatic P 54 63.7356 0.464051 0.186956
HL.ITM.HHZ. 2015-09-18T16:10:11.28 10.0 positive automatic P 56 63.3793 0.109605 0.357636
GE.DAG.BHZ. 2015-09-18T16:10:09.75 10.0 positive automatic P 7 63.1636 0.0772528 0.308582
HT.FNA.HHZ. 2015-09-18T16:10:09.29 10.0 positive automatic P 52 63.0701 0.114458 0.191612
PL.OJC.BHZ. 2015-09-18T16:10:08.08 10.0 positive automatic P 41 62.9259 -0.0771598 0.345875
GE.PSZ.BHZ. 2015-09-18T16:10:06.05 10.0 positive automatic P 44 62.6589 -0.425885 0.365512
MN.DIVS.BHZ. 2015-09-18T16:10:04.15 10.0 positive automatic P 48 62.2885 0.148911 0.379287
HL.KEK.HHZ. 2015-09-18T16:10:00.87 10.0 positive automatic P 53 61.8023 0.269964 0
US.WUAZ.BHZ.00 2015-09-18T16:09:59.03 10.0 negative automatic P 303 61.3847 1.0091 0.391806
MN.PDG.BHZ. 2015-09-18T16:09:59.39 10.0 positive automatic P 50 61.6024 0.175604 0.362854
GE.MORC.BHZ. 2015-09-18T16:09:57.63 10.0 positive automatic P 41 61.4223 -0.499305 0.38218
IU.TUC.BHZ.00 2015-09-18T16:09:55.27 10.0 positive automatic P 299 60.8634 0.9068 0.399118
PL.KSP.BHZ. 2015-09-18T16:09:53.73 10.0 positive automatic P 40 60.8483 -0.431203 0.390043
GT.PLCA.BHZ.00 2015-09-18T16:09:50.35 10.0 negative automatic P 201 60.404 -0.90335 0.39163
IM.PD31.BHZ. 2015-09-18T16:09:50.85 10.0 negative automatic P 311 60.4708 -1.05862 0.395259
MN.TIP.BHZ. 2015-09-18T16:09:41.07 10.0 positive automatic P 53 59.4236 -3.39282 0.220325
CZ.KHC.BHZ. 2015-09-18T16:09:38.82 10.0 positive automatic P 41 58.7677 -1.08346 0.429198
IW.SMCO.BHZ.00 2015-09-18T16:09:37.57 10.0 positive automatic P 307 58.1321 1.62861 0
MN.TRI.BHZ. 2015-09-18T16:09:34.99 10.0 positive automatic P 45 58.1596 -0.574705 0.427942
GE.FLT1.BHZ. 2015-09-18T16:09:34.85 10.0 positive automatic P 37 58.1886 -0.912025 0.417807
IV.PTCC.BHZ. 2015-09-18T16:09:33.45 10.0 positive automatic P 44 58.0214 -1.2411 0.429937
IU.ANMO.BHZ.00 2015-09-18T16:09:32.07 10.0 positive automatic P 302 57.3474 1.92916 0.450206
GE.SUMG.BHZ. 2015-09-18T16:09:31.50 10.0 positive automatic P 3 57.5445 -0.272734 0.417444
MN.AQU.BHZ. 2015-09-18T16:09:29.72 10.0 positive automatic P 49 57.3041 0.0703648 0.430362
IU.RSSD.BHZ.00 2015-09-18T16:09:26.27 10.0 positive automatic P 313 56.7233 0.507976 0.438704
MN.CLTB.BHZ. 2015-09-18T16:09:24.15 10.0 positive automatic P 55 56.4996 0.168715 0.462985
MN.VLC.BHZ. 2015-09-18T16:09:16.25 10.0 positive automatic P 46 55.4973 -0.483697 0.220765
IM.TX31.BHZ. 2015-09-18T16:09:11.25 10.0 positive automatic P 295 54.7109 0.119451 0.496443
GE.WLF.BHZ. 2015-09-18T16:09:07.50 10.0 positive automatic P 39 54.2995 -0.51329 0.401407
TT.TATN.HHZ.00 2015-09-18T16:09:04.13 10.0 positive automatic P 60 53.8216 -0.436301 0.504525
MN.VSL.BHZ. 2015-09-18T16:09:03.88 10.0 positive automatic P 52 53.8126 -0.589923 0.232923
MN.BNI.BHZ. 2015-09-18T16:09:00.47 10.0 positive automatic P 45 53.1727 0.524896 0.491457
CN.ULM.BHZ. 2015-09-18T16:08:59.03 10.0 positive automatic P 322 53.218 -1.0574 0.508087
FR.RUSF.BHZ.01 2015-09-18T16:08:54.80 10.0 positive automatic P 46 52.0368 3.42566 0.439107
GE.SFJD.BHZ.00 2015-09-18T16:08:50.92 10.0 positive automatic P 358 51.8907 0.665504 0.51124
G.SSB.BHZ.00 2015-09-18T16:08:49.75 10.0 positive automatic P 44 51.8067 0.0533489 0.536955
CN.FRB.BHZ. 2015-09-18T16:08:44.48 10.0 positive automatic P 347 51.01 0.869688 0.537266
US.WMOK.BHZ.00 2015-09-18T16:08:43.63 10.0 positive automatic P 303 51.0637 -0.463671 0.549169
US.KSU1.BHZ.00 2015-09-18T16:08:36.98 10.0 positive automatic P 309 50.2057 -0.608403 0
DK.NUUK.BHZ.00 2015-09-18T16:08:31.00 10.0 positive automatic P 357 49.1459 1.52996 0.554905
US.MIAR.BHZ.00 2015-09-18T16:08:11.85 10.0 negative automatic P 303 46.818 0.393967 0.511904
IU.CCM.BHZ.00 2015-09-18T16:08:03.92 10.0 negative automatic P 309 45.8858 -0.214262 0.294508
CN.KAPO.BHZ. 2015-09-18T16:08:00.03 10.0 negative automatic P 327 45.3246 0.287251 0.633068
IU.PAB.BHZ.00 2015-09-18T16:07:45.62 10.0 positive automatic P 48 43.6617 -0.895368 0.647514
IU.WVT.BHZ.00 2015-09-18T16:07:39.12 10.0 positive automatic P 307 42.7058 0.474459 0.635501
CN.SCHQ.BHZ. 2015-09-18T16:07:38.53 10.0 positive automatic P 342 42.8124 -1.04842 0.662495
GE.MTE.BHZ. 2015-09-18T16:07:30.15 10.0 positive automatic P 45 41.769 -0.978781 0.730973
GT.DBIC.BHZ.00 2015-09-18T16:07:25.80 10.0 positive automatic P 97 41.1586 -0.18957 0.733854
IU.KOWA.BHZ.00 2015-09-18T16:07:20.15 10.0 positive automatic P 85 40.4726 -0.221413 0.696734
LX.MORF.BHZ. 2015-09-18T16:07:13.95 10.0 positive automatic P 49 39.6867 0.0763066 0
GT.LPAZ.BHZ.00 2015-09-18T16:07:03.28 10.0 positive automatic P 216 38.3497 -0.141331 0.385142
IU.SSPA.BHZ.00 2015-09-18T16:06:56.72 10.0 negative automatic P 319 37.613 0.305936 0.513066
IU.OTAV.BHZ.00 2015-09-18T16:06:38.87 10.0 positive automatic P 248 35.4176 0.644168 0.800166
CN.DRLN.BHZ. 2015-09-18T16:06:37.63 10.0 positive automatic P 347 35.3455 0.583649 0.810785
IU.RCBR.BHZ.00 2015-09-18T16:04:48.47 10.0 negative automatic P 154 23.2577 -0.637651 0.909091
CU.GRGR.BHZ.00 2015-09-18T16:03:19.05 10.0 positive automatic P 261 15.5633 -1.6644 0.610687
CU.ANWB.BHZ.00 2015-09-18T16:03:15.38 10.0 positive automatic P 281 15.3879 -3.01463 0.43956
G.FDF.BHZ.00 2015-09-18T16:03:06.65 10.0 positive automatic P 270 14.6896 -2.42367 0.43956
CU.BBGH.BHZ.00 2015-09-18T16:02:51.65 10.0 positive automatic P 263 13.3549 0.836682 0.930233
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
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