INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Mwp 6.8 on date 29-08-2016 and time 04:29:58 (UTC) in region North of Ascension Island [Sea]

A magnitude Mwp 6.8 earthquake occured in region: North of Ascension Island [Sea], on

  • 29-08-2016 04:29:58 (UTC)
  • 29-08-2016 06:29:58 (UTC +02:00) Italian time
  • 29-08-2016 04:29:58 (UTC +00:00) local time in the region of the earthquake (Africa/Monrovia)

and geographic coordinates (lat, lon) 0.06, -17.75 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
Seismic hazard
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 5.6
Mwp 6.8

Mwpd 6.9
2016-08-29
04:29:58
0.06 -17.75 1 2016-08-29
04:52:09
Sala Sismica INGV-Roma 27591401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-08-29 04:29:58
Latitude 0.06
Longitude -17.75
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 27591401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 18194
Semi-minor axis of confidence ellipse (meter) 13764
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 328
Circular confidence region, given by single value of horizontal uncertainty (meter) 14686.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64.8694
Number of associated phases, regardless of their use for origin computation 131
Number of defining phases 131
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.70362
Epicentral distance of station closest to the epicenter (degree) 14.34987
Epicentral distance of station farthest from the epicenter (degree) 95.74788
Number of stations at which the event was observed 131
Number of stations from which data was used for origin computation 131
Magnitudes information

Mwpd:6.9

Field Value
Value 6.9
Uncertainty 0.1
Num. used stations 105
Type of magnitude Mwpd
Reference to an origin 27591401
Agency INGV
Autore Auto added
Time of creation (UTC) 2016-08-29 04:52:09

Mwp:6.8

Field Value
Value 6.8
Uncertainty 0.1
Num. used stations 106
Type of magnitude Mwp
Reference to an origin 27591401
Agency INGV
Autore Auto added
Time of creation (UTC) 2016-08-29 04:52:09

mb:5.7

Field Value
Value 5.7
Uncertainty 0.1
Num. used stations 115
Type of magnitude mb
Reference to an origin 27591401
Agency INGV
Autore Auto added
Time of creation (UTC) 2016-08-29 04:52:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
NN.PRN.HHZ. 2016-08-29T04:43:27.73 10.0 negative automatic P 308 95.7479 3.27399 0.0549619
US.WUAZ.BHZ.00 2016-08-29T04:43:14.65 10.0 negative automatic P 306 92.9049 3.22007 0.0687369
IU.TUC.BHZ.00 2016-08-29T04:43:11.92 10.0 positive automatic P 302 92.5232 2.36342 0.0741083
II.AAK.BHZ.00 2016-08-29T04:43:06.52 10.0 positive automatic P 47 91.6068 1.08314 0.0834386
IM.PD31.BHZ. 2016-08-29T04:43:05.05 10.0 positive automatic P 313 91.2774 1.03888 0.0835841
IW.SMCO.BHZ.00 2016-08-29T04:42:56.07 10.0 positive automatic P 309 89.3515 0.818193 0.0974435
IU.ANMO.BHZ.00 2016-08-29T04:42:54.17 10.0 negative automatic P 305 88.897 1.33733 0.101813
II.BRVK.BHZ.00 2016-08-29T04:42:52.27 10.0 positive automatic P 37 88.7657 0.311166 0.10036
MX.HPIG.BHZ. 2016-08-29T04:42:51.42 10.0 positive automatic P 297 88.1044 2.34121 0.100364
KZ.KKAR.BHZ. 2016-08-29T04:42:51.73 10.0 positive automatic P 47 88.6865 0.106125 0.0964287
IU.RSSD.BHZ.00 2016-08-29T04:42:46.72 10.0 negative automatic P 314 87.284 1.51336 0.0994155
AU.MAW.BHZ. 2016-08-29T04:42:41.84 10.0 positive automatic P 158 86.4965 0.829729 0.115491
MX.ZAIG.BHZ. 2016-08-29T04:42:38.30 10.0 negative automatic P 293 85.1899 3.35574 0.121248
US.CBKS.BHZ.00 2016-08-29T04:42:26.70 10.0 negative automatic P 309 83.7181 -0.483806 0.132544
US.WMOK.BHZ.00 2016-08-29T04:42:20.60 10.0 negative automatic P 305 82.596 -0.747875 0.155299
II.ARU.BHZ.00 2016-08-29T04:42:20.17 10.0 positive automatic P 33 82.4263 -0.256923 0.142873
CN.ULM.BHZ. 2016-08-29T04:42:19.45 10.0 positive automatic P 321 82.3839 -0.753445 0.151644
US.KVTX.BHZ.00 2016-08-29T04:42:19.00 10.0 negative automatic PcP 298 81.2329 -1.32627 0
MX.TLIG.BHZ. 2016-08-29T04:42:17.52 10.0 positive automatic PcP 288 81.2213 -2.94521 0
KZ.ABKAR.BHZ. 2016-08-29T04:42:17.93 10.0 positive automatic P 40 81.9537 -0.0377108 0.159126
US.KSU1.BHZ.00 2016-08-29T04:42:14.15 10.0 negative automatic P 310 81.3294 -0.505894 0.0751393
IU.HKT.BHZ.00 2016-08-29T04:42:05.52 10.0 negative automatic P 300 79.6601 -0.0460704 0.0822339
II.LVZ.BHZ.00 2016-08-29T04:41:55.57 10.0 negative automatic P 18 76.6661 6.42678 0.198049
IU.KEV.BHZ.00 2016-08-29T04:41:53.62 10.0 positive automatic PcP 15 75.7122 -2.74722 0
IU.CCM.BHZ.00 2016-08-29T04:41:49.97 10.0 negative automatic P 309 77.0266 -1.13461 0.208804
IU.PAYG.BHZ.00 2016-08-29T04:41:42.42 10.0 negative automatic PcP 269 72.531 -0.326941 0
II.UOSS.BHZ.00 2016-08-29T04:41:42.42 10.0 positive automatic P 64 75.4585 0.220259 0.0524839
MX.CCIG.BHZ. 2016-08-29T04:41:42.71 10.0 negative automatic P 287 75.0027 2.9097 0.192622
IU.PMSA.BHZ.00 2016-08-29T04:41:40.52 10.0 negative automatic PcP 199 72.931 -3.89686 0
CN.FRB.BHZ. 2016-08-29T04:41:35.15 10.0 positive automatic P 339 73.7 3.20777 0.217956
CN.KAPO.BHZ. 2016-08-29T04:41:34.55 10.0 negative automatic P 322 73.8491 1.70116 0.226313
IU.WVT.BHZ.00 2016-08-29T04:41:32.67 10.0 negative automatic P 308 73.9818 -0.950976 0.235651
DK.SCO.BHZ. 2016-08-29T04:41:29.55 10.0 positive automatic PcP 359 70.4737 -4.41674 0
IU.WCI.BHZ.00 2016-08-29T04:41:29.07 10.0 negative automatic P 310 73.254 -0.273105 0.232526
US.BRAL.BHZ.00 2016-08-29T04:41:28.35 10.0 negative automatic P 303 72.3549 4.37146 0
IU.SFJD.BHZ.00 2016-08-29T04:41:25.32 10.0 positive automatic PcP 347 70.7732 -9.96025 0
IU.TEIG.BHZ.00 2016-08-29T04:41:19.57 10.0 negative automatic P 291 71.7411 -0.727477 0.263679
DK.NUUK.BHZ.00 2016-08-29T04:41:18.60 10.0 negative automatic PcP 345 68.7498 -8.10304 0
DK.ICESG.BHZ.00 2016-08-29T04:41:14.25 10.0 positive automatic P 352 70.597 0.384257 0.267364
II.OBN.BHZ.00 2016-08-29T04:41:11.32 10.0 positive automatic P 30 70.4559 -1.20732 0
CN.VLDQ.BHZ. 2016-08-29T04:41:11.88 10.0 negative automatic P 322 70.4779 -0.774667 0.262616
CU.TGUH.BHZ.00 2016-08-29T04:41:10.40 10.0 negative automatic P 285 70.1392 -0.356123 0.272608
CN.SADO.BHZ. 2016-08-29T04:41:09.53 10.0 negative automatic P 318 70.0739 -0.674563 0.279868
DK.DY2G.BHZ.10 2016-08-29T04:41:06.65 10.0 positive automatic P 348 69.4152 0.18845 0.241664
IU.GNI.BHZ.00 2016-08-29T04:41:05.92 10.0 positive automatic P 46 69.2816 0.376477 0.282569
II.KIV.BHZ.00 2016-08-29T04:41:04.67 10.0 positive automatic P 42 69.148 0.0513829 0.284138
II.JTS.BHZ.00 2016-08-29T04:40:56.92 10.0 positive automatic P 281 67.5703 2.30074 0
CN.GAC.BHZ. 2016-08-29T04:40:56.90 10.0 negative automatic P 320 68.052 -0.707679 0.293748
CN.SCHQ.BHZ. 2016-08-29T04:40:55.98 10.0 positive automatic P 332 67.7766 0.0273861 0.300482
IU.SSPA.BHZ.00 2016-08-29T04:40:55.52 10.0 negative automatic P 315 67.749 -0.215052 0.287446
IU.DWPF.BHZ.00 2016-08-29T04:40:54.72 10.0 positive automatic P 301 66.9416 4.14227 0
G.IVI.BHZ.00 2016-08-29T04:40:48.70 10.0 negative automatic P 344 65.3936 8.06859 0.15592
US.CNNC.BHZ.00 2016-08-29T04:40:44.20 10.0 negative automatic P 309 65.9599 -0.0885778 0
II.BORG.BHZ.00 2016-08-29T04:40:37.82 10.0 positive automatic P 358 64.7338 1.46055 0.330689
DK.NRS.BHZ. 2016-08-29T04:40:36.55 10.0 positive automatic P 346 64.6442 0.784258 0.0540734
IU.HRV.BHZ.00 2016-08-29T04:40:32.32 10.0 negative automatic P 319 64.1421 -0.17881 0.362888
IU.KONO.BHZ.00 2016-08-29T04:40:26.47 10.0 negative automatic P 15 63.2692 -0.272662 0
GT.PLCA.BHZ.00 2016-08-29T04:40:23.68 10.0 positive automatic P 223 62.7743 0.082684 0.355703
CU.BCIP.BHZ.00 2016-08-29T04:40:21.58 10.0 negative automatic P 280 62.4562 0.27615 0.301588
KO.BZK.BHZ. 2016-08-29T04:40:19.60 10.0 positive automatic P 41 62.5437 -2.30152 0
G.ATD.BHZ.00 2016-08-29T04:40:16.00 10.0 positive automatic P 77 61.2329 2.83963 0.359672
CU.MTDJ.BHZ.00 2016-08-29T04:40:14.73 10.0 negative automatic P 291 61.416 0.275638 0
DK.MUD.BHZ. 2016-08-29T04:40:13.39 10.0 positive automatic P 17 60.4197 5.87505 0.378367
IU.OTAV.BHZ.00 2016-08-29T04:40:09.22 10.0 negative automatic P 270 60.6942 -0.777519 0.259434
G.PEL.BHZ.00 2016-08-29T04:40:07.85 10.0 positive automatic P 231 59.7179 5.03392 0.323107
KO.MDUB.BHZ. 2016-08-29T04:40:03.92 10.0 positive automatic P 41 59.9784 -0.76364 0.400251
PL.OJC.BHZ. 2016-08-29T04:39:59.60 10.0 positive automatic P 27 59.4588 -1.38012 0.400105
IU.LCO.BHZ.00 2016-08-29T04:39:53.52 10.0 negative automatic P 235 58.2336 0.733947 0.407902
PL.KSP.BHZ. 2016-08-29T04:39:52.97 10.0 positive automatic P 25 58.3923 -0.594053 0.372601
KO.ELL.BHZ. 2016-08-29T04:39:47.42 10.0 positive automatic P 45 57.2924 1.43046 0.430528
C.GO03.BHZ. 2016-08-29T04:39:45.95 10.0 negative automatic P 237 57.3655 -0.465694 0.449935
HT.ALN.HHZ. 2016-08-29T04:39:43.16 10.0 positive automatic P 39 56.886 0.248389 0.454971
HL.RDO.HHZ. 2016-08-29T04:39:42.05 10.0 positive automatic P 38 56.7081 0.400434 0.473349
CU.GRTK.BHZ.00 2016-08-29T04:39:41.85 10.0 positive automatic P 296 56.2609 3.40321 0
II.ESK.BHZ.00 2016-08-29T04:39:39.72 10.0 negative automatic P 10 56.5137 -0.571831 0.452007
HL.ARG.HHZ. 2016-08-29T04:39:35.37 10.0 positive automatic P 44 55.7769 0.365798 0.483222
CU.SDDR.BHZ.00 2016-08-29T04:39:35.50 10.0 negative automatic P 293 55.7766 0.422343 0.474023
CZ.KHC.BHZ. 2016-08-29T04:39:35.57 10.0 positive automatic P 24 55.9593 -0.841042 0.47122
MN.DIVS.BHZ. 2016-08-29T04:39:32.49 10.0 positive automatic P 32 55.3425 0.455381 0.480714
OE.ARSA.BHZ. 2016-08-29T04:39:31.63 10.0 positive automatic P 27 55.3658 -0.493167 0.469183
AF.POGA.BHZ. 2016-08-29T04:39:26.75 10.0 positive automatic P 124 54.7701 -1.02201 0.467353
MN.BLY.BHZ. 2016-08-29T04:39:24.69 10.0 positive automatic P 30 54.3371 0.0680764 0.473826
OE.KBA.BHZ. 2016-08-29T04:39:23.75 10.0 positive automatic P 26 54.27 -0.628637 0.485876
MN.PDG.BHZ. 2016-08-29T04:39:21.82 10.0 positive automatic P 33 53.8329 0.924044 0.504345
IV.PTCC.BHZ. 2016-08-29T04:39:20.20 10.0 positive automatic P 26 53.7577 -0.265697 0.493781
MN.TIR.BHZ. 2016-08-29T04:39:19.39 10.0 positive automatic P 35 53.4578 1.20156 0.487109
IU.SDV.BHZ.00 2016-08-29T04:39:17.57 10.0 negative automatic P 281 53.384 -0.305805 0.499586
MN.IDI.BHZ. 2016-08-29T04:39:16.16 10.0 positive automatic P 44 53.0519 0.884627 0.482342
II.BFO.BHZ.00 2016-08-29T04:39:15.42 10.0 positive automatic P 21 53.2744 -1.47461 0.513233
OE.DAVA.BHZ. 2016-08-29T04:39:13.93 10.0 positive automatic P 23 53.0015 -1.121 0.472594
G.ECH.BHZ.00 2016-08-29T04:39:12.60 10.0 positive automatic P 21 52.7586 -0.486697 0.534227
HL.KEK.HHZ. 2016-08-29T04:39:10.48 10.0 positive automatic P 36 52.3656 0.372546 0.508487
GT.LPAZ.BHZ.00 2016-08-29T04:39:09.05 10.0 negative automatic P 249 52.2757 -1.18375 0.517006
HL.ITM.HHZ. 2016-08-29T04:39:08.61 10.0 positive automatic P 40 52.1275 0.237734 0.459515
IV.SALO.BHZ. 2016-08-29T04:39:05.93 10.0 positive automatic P 25 51.9184 -0.919482 0.510807
G.CLF.BHZ.00 2016-08-29T04:39:00.35 10.0 positive automatic P 17 51.0046 0.427901 0.52514
IU.SJG.BHZ.00 2016-08-29T04:38:58.32 10.0 negative automatic P 294 50.842 -0.425598 0.263856
MN.VLC.BHZ. 2016-08-29T04:38:57.55 10.0 positive automatic P 26 50.6984 -0.1379 0.529988
IV.MGAB.BHZ. 2016-08-29T04:38:56.20 10.0 positive automatic P 28 50.5128 -0.0874371 0.254883
IV.MONC.BHZ. 2016-08-29T04:38:56.12 10.0 positive automatic P 23 50.4131 0.599322 0.522646
MN.TIP.BHZ. 2016-08-29T04:38:54.10 10.0 positive automatic P 35 50.2475 -0.211342 0.562745
MN.BNI.BHZ. 2016-08-29T04:38:51.87 10.0 positive automatic P 22 49.9082 0.0194052 0.542598
GT.BOSA.BHZ.00 2016-08-29T04:38:51.68 10.0 positive automatic P 129 50.1014 -1.61897 0.572002
G.SSB.BHZ.00 2016-08-29T04:38:47.40 10.0 positive automatic P 21 49.3179 0.177304 0.539847
MN.CEL.BHZ. 2016-08-29T04:38:46.35 10.0 positive automatic P 35 49.1285 0.577092 0.555187
FR.RUSF.BHZ.01 2016-08-29T04:38:44.20 10.0 positive automatic P 22 48.5143 3.18095 0.540634
II.MBAR.BHZ.00 2016-08-29T04:38:43.47 10.0 positive automatic P 91 48.4937 2.45501 0.592476
GT.LBTB.BHZ.00 2016-08-29T04:38:42.55 10.0 positive automatic P 124 48.8131 -0.879066 0.566762
II.SUR.BHZ.00 2016-08-29T04:38:41.92 10.0 positive automatic P 136 48.7185 -0.89091 0.574935
MN.CLTB.BHZ. 2016-08-29T04:38:31.65 10.0 positive automatic P 34 47.1376 1.22434 0.615988
CU.ANWB.BHZ.00 2016-08-29T04:38:27.05 10.0 negative automatic P 295 46.7327 -0.0460018 0.601612
GT.CPUP.BHZ.00 2016-08-29T04:38:22.30 10.0 negative automatic P 232 46.3433 -1.75413 0.629975
G.FDF.BHZ.00 2016-08-29T04:38:16.55 10.0 negative automatic P 291 45.3259 0.470735 0.523478
CU.GRGR.BHZ.00 2016-08-29T04:38:15.38 10.0 negative automatic P 287 45.1937 0.397136 0
IU.PAB.BHZ.00 2016-08-29T04:37:44.17 10.0 positive automatic P 16 41.3362 0.24015 0.582949
SS.COI.BHZ. 2016-08-29T04:37:42.07 10.0 positive automatic P 11 41.0348 0.761665 0.718911
AF.WIN.BHZ. 2016-08-29T04:37:39.50 10.0 negative automatic P 126 40.7665 0.120242 0.683744
PM.PESTR.BHZ. 2016-08-29T04:37:32.47 10.0 positive automatic P 12 39.9061 0.448665 0.715052
IU.TSUM.BHZ.00 2016-08-29T04:37:30.17 10.0 positive automatic P 121 39.6437 0.195043 0.7039
LX.MESJ.BHZ. 2016-08-29T04:37:23.21 10.0 positive automatic P 12 38.7834 0.596463 0.71954
PM.PVAQ.BHZ. 2016-08-29T04:37:20.65 10.0 positive automatic P 13 38.4724 0.657588 0.758968
LX.MORF.BHZ. 2016-08-29T04:37:18.02 10.0 positive automatic P 12 38.1774 0.450394 0.6447
G.MPG.BHZ.00 2016-08-29T04:36:51.70 10.0 negative automatic P 279 35.2045 -0.449304 0.82303
BL.PMNB.HHZ. 2016-08-29T04:36:38.08 10.0 negative automatic P 235 33.7575 -1.6786 0.81435
PM.PMOZ.BHZ. 2016-08-29T04:36:32.10 10.0 positive automatic P 1 32.7625 1.00964 0
G.TAM.BHZ.00 2016-08-29T04:36:19.30 10.0 positive automatic P 43 32.0821 -5.88075 0.82884
II.SHEL.BHZ.00 2016-08-29T04:34:29.67 10.0 negative automatic P 144 19.928 -0.0519678 0.43956
IU.KOWA.BHZ.00 2016-08-29T04:34:27.72 10.0 positive automatic P 43 19.8241 -0.832511 0.963855
IU.RCBR.BHZ.00 2016-08-29T04:34:18.47 10.0 negative automatic P 252 19.0491 -1.61331 0.909091
GT.DBIC.BHZ.00 2016-08-29T04:33:20.68 10.0 positive automatic P 63 14.4642 -1.60124 0.97561
G.MBO.BHZ.00 2016-08-29T04:33:17.90 10.0 positive automatic P 3 14.3499 -2.796 0.43956
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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