Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 5.8 on date 11-09-2023 and time 09:20:57 (UTC) in region Central Mid Atlantic Ridge [Sea]

A magnitude Mwp 5.8 earthquake occured in region: Central Mid Atlantic Ridge [Sea], on

  • 11-09-2023 09:20:57 (UTC)
  • 11-09-2023 11:20:57 (UTC +02:00) Italian time
  • 11-09-2023 07:20:57 (UTC -02:00) local time in the region of the earthquake (America/Noronha)

and geographic coordinates (lat, lon) 0.7520, -25.9940 at 2 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.

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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
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		mb 5.1
Mwp 5.8
Mwpd 5.9 		2023-09-11
09:20:57		 0.7523 -25.9945 2 2023-09-11
09:40:44		 Sala Sismica INGV-Roma 120970071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-11 09:20:57
Latitude 0.7523
Longitude -25.9945
Depth (km) 2 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 120970071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 32059475
Semi-minor axis of confidence ellipse (meter) 25807839
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 140
Circular confidence region, given by single value of horizontal uncertainty (meter) 26056400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55.1773
Number of associated phases, regardless of their use for origin computation 85
Number of defining phases 85
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.39164
Epicentral distance of station closest to the epicenter (degree) 11.87958
Epicentral distance of station farthest from the epicenter (degree) 90.39502
Number of stations at which the event was observed 85
Number of stations from which data was used for origin computation 85
Magnitudes information

Mwpd:5.9

Field Value
Value 5.9
Uncertainty 0.1
Num. used stations 17
Type of magnitude Mwpd
Reference to an origin 120970071
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-11 09:40:44

Mwp:5.8

Field Value
Value 5.8
Uncertainty 0.1
Num. used stations 18
Type of magnitude Mwp
Reference to an origin 120970071
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-11 09:40:44

mb:5.1

Field Value
Value 5.1
Uncertainty 0.2
Num. used stations 91
Type of magnitude mb
Reference to an origin 120970071
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-11 09:40:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
US.BMO.BHZ.00 2023-09-11T09:33:59.50 10.0 positive automatic P 315 10033.845 1.00875 0.111665
US.TPNV.BHZ.00 2023-09-11T09:33:57.43 10.0 positive automatic P 307 9961.9725 0.87104 0.110617
US.ELK.BHZ.00 2023-09-11T09:33:52.90 10.0 positive automatic P 311 9871.5075 1.07065 0.108813
US.HLID.BHZ.00 2023-09-11T09:33:49.85 10.0 positive automatic P 314 9804.8742 0.927537 0.116942
US.MSO.BHZ.00 2023-09-11T09:33:48.40 10.0 positive automatic P 317 9772.6842 0.938153 0.114944
US.DUG.BHZ.00 2023-09-11T09:33:43.95 10.0 positive automatic P 310 9665.9799 1.07244 0.120327
US.BOZ.BHZ.00 2023-09-11T09:33:40.78 10.0 positive automatic P 316 9591.0105 1.1847 0.120761
II.ARTI.BHZ.00 2023-09-11T09:33:39.57 10.0 positive automatic P 34 9574.9599 0.908237 0.103857
US.HWUT.BHZ.00 2023-09-11T09:33:39.23 10.0 positive automatic P 312 9566.5905 0.674655 0.0404594
US.WUAZ.BHZ.00 2023-09-11T09:33:38.40 10.0 positive automatic P 306 9523.6779 0.415326 0.116908
US.AHID.BHZ.00 2023-09-11T09:33:37.28 10.0 positive automatic P 313 9534.1896 0.142744 0.125185
IU.TUC.BHZ.00 2023-09-11T09:33:35.12 10.0 positive automatic P 302 9456.2787 0.174255 0.122765
US.EGMT.BHZ.00 2023-09-11T09:33:34.68 10.0 positive automatic P 318 9464.6148 0.819918 0.122549
US.BW06.BHZ.00 2023-09-11T09:33:31.63 10.0 positive automatic P 313 9408.7485 0.0960305 0.11712
US.MVCO.BHZ.00 2023-09-11T09:33:27.03 10.0 positive automatic P 307 9276.2589 1.57894 0.129096
IU.ANMO.BHZ.00 2023-09-11T09:33:17.35 10.0 positive automatic P 305 9074.9271 0.384926 0.136513
US.SDCO.BHZ.00 2023-09-11T09:33:14.33 10.0 positive automatic P 308 9018.9165 0.929179 0.124693
II.FFC.BHZ.00 2023-09-11T09:33:13.55 10.0 positive automatic P 325 9028.3071 -0.358776 0.124434
IU.RSSD.BHZ.00 2023-09-11T09:33:12.10 10.0 positive automatic P 315 8981.3208 0.280141 0.137715
US.OGNE.BHZ.00 2023-09-11T09:33:01.55 10.0 positive automatic P 312 8768.4783 0.6012 0.142783
US.CBKS.BHZ.00 2023-09-11T09:32:49.48 10.0 positive automatic P 310 8537.5317 0.211161 0.152406
US.AGMN.BHZ.00 2023-09-11T09:32:44.55 10.0 positive automatic P 320 8456.3241 -0.567747 0.155348
US.JCT.BHZ.00 2023-09-11T09:32:42.93 10.0 positive automatic P 301 8402.5446 0.536684 0.0768419
US.ECSD.BHZ.00 2023-09-11T09:32:41.08 10.0 positive automatic P 315 8390.3124 -0.665785 0.154132
US.WMOK.BHZ.00 2023-09-11T09:32:40.73 10.0 positive automatic P 306 8378.3355 -0.421788 0.152797
US.KSU1.BHZ.00 2023-09-11T09:32:34.93 10.0 positive automatic P 311 8278.3689 -0.645265 0.162099
GE.SNAA.BHZ. 2023-09-11T09:32:31.91 10.0 positive automatic P 173 8206.9182 -1.21185 0.161099
II.RAYN.BHZ.00 2023-09-11T09:32:27.50 10.0 positive automatic P 66 8077.248 2.18883 0.162534
GE.SUMG.BHZ.10 2023-09-11T09:32:24.80 10.0 positive automatic P 356 8019.0951 2.17183 0.1649
IU.HKT.BHZ.00 2023-09-11T09:32:22.35 10.0 positive automatic P 301 8018.0739 0.045068 0.166837
US.NATX.BHZ.00 2023-09-11T09:32:18.45 10.0 positive automatic P 303 7943.5041 0.434946 0.173985
US.MIAR.BHZ.00 2023-09-11T09:32:15.80 10.0 positive automatic P 306 7907.751 -0.0707736 0.0867604
US.JFWS.BHZ.00 2023-09-11T09:32:13.48 10.0 positive automatic P 316 7870.6992 -0.594652 0.0604966
IU.CCM.BHZ.00 2023-09-11T09:32:09.52 10.0 positive automatic P 311 7798.7157 0.47115 0.166772
US.HDIL.BHZ.00 2023-09-11T09:32:04.75 10.0 positive automatic P 314 7716.2871 -0.77612 0.180145
IU.KIEV.BHZ.00 2023-09-11T09:31:56.52 10.0 positive automatic P 34 7569.4452 -0.759921 0.173263
US.GLMI.BHZ.00 2023-09-11T09:31:54.30 10.0 positive automatic P 319 7520.8161 -0.262503 0.142224
IU.WVT.BHZ.00 2023-09-11T09:31:50.02 10.0 positive automatic P 309 7449.0324 0.660724 0.186861
IU.WCI.BHZ.00 2023-09-11T09:31:47.50 10.0 positive automatic P 312 7391.1903 1.48094 0.198626
US.LRAL.BHZ.00 2023-09-11T09:31:40.85 10.0 positive automatic P 306 7278.5586 0.272761 0.200167
US.ACSO.BHZ.00 2023-09-11T09:31:36.45 10.0 positive automatic P 315 7202.2905 0.303142 0.209183
US.TZTN.BHZ.00 2023-09-11T09:31:30.68 10.0 positive automatic P 311 7100.6256 0.5065 0.0451432
IM.TKL.BHZ. 2023-09-11T09:31:29.54 10.0 positive automatic P 310 7086.2733 0.236551 0.111951
US.MCWV.BHZ.00 2023-09-11T09:31:20.85 10.0 positive automatic P 315 6931.9833 0.780843 0.228474
GE.PSZ.BHZ. 2023-09-11T09:31:14.45 10.0 positive automatic P 33 6833.2044 -0.488656 0.232395
G.COYC.BHZ.00 2023-09-11T09:31:13.45 10.0 positive automatic P 215 6834.0147 0.0438042 0.23234
GE.MORC.BHZ. 2023-09-11T09:31:12.85 10.0 positive automatic P 30 6819.2406 -0.836659 0.213489
US.BINY.BHZ.00 2023-09-11T09:31:10.83 10.0 positive automatic P 320 6768.9687 0.619877 0.242466
US.NHSC.BHZ.00 2023-09-11T09:31:05.75 10.0 positive automatic P 308 6679.3584 1.14051 0.246087
C1.LL02.BHZ. 2023-09-11T09:31:03.53 10.0 positive automatic P 217 6668.7579 -0.487739 0.238455
C1.LL01.BHZ. 2023-09-11T09:31:02.30 10.0 positive automatic P 218 6657.0363 -0.940027 0.242046
MN.DIVS.BHZ. 2023-09-11T09:31:00.12 10.0 positive automatic P 37 6600.1599 0.0948867 0.117706
US.LBNH.BHZ.00 2023-09-11T09:31:00.78 10.0 positive automatic P 323 6605.2104 0.702195 0.251645
IU.HRV.BHZ.00 2023-09-11T09:30:52.07 10.0 positive automatic P 322 6474.8853 0.549896 0.255858
GT.PLCA.BHZ.00 2023-09-11T09:30:48.48 10.0 positive automatic P 219 6427.0776 0.217246 0.265789
C.GO06.BHZ. 2023-09-11T09:30:48.80 10.0 positive automatic P 220 6422.1936 0.0543154 0.24594
IV.PTCC.BHZ. 2023-09-11T09:30:43.75 10.0 positive automatic P 31 6341.5965 0.500982 0.26983
OE.DAVA.BHZ. 2023-09-11T09:30:35.32 10.0 positive automatic P 29 6215.2785 0.172644 0.280911
GE.DSB.BHZ. 2023-09-11T09:30:28.40 10.0 positive automatic P 14 6100.4601 0.180246 0.278627
C1.BO02.BHZ. 2023-09-11T09:30:27.27 10.0 positive automatic P 225 6091.2915 -0.148004 0.299429
G.PEL.BHZ.00 2023-09-11T09:30:20.50 10.0 positive automatic P 227 5991.0585 0.508651 0.282617
C1.CO02.BHZ. 2023-09-11T09:30:15.40 10.0 positive automatic P 229 5913.9024 -0.402088 0.0966805
RD.LOR.BHZ. 2023-09-11T09:30:15.62 10.0 positive automatic P 25 5912.1486 0.0500879 0.158927
FR.SAOF.HHZ.00 2023-09-11T09:30:10.77 10.0 positive automatic P 30 5827.6998 0.814932 0.305324
RD.PGF.BHZ. 2023-09-11T09:30:07.98 10.0 positive automatic P 32 5798.4513 -0.116234 0.340162
IU.LCO.BHZ.00 2023-09-11T09:30:06.82 10.0 positive automatic P 231 5776.0515 0.933552 0.333011
RD.MFF.BHZ. 2023-09-11T09:29:59.82 10.0 positive automatic P 23 5673.1323 0.31294 0.338753
MN.VSL.BHZ. 2023-09-11T09:29:54.57 10.0 positive automatic P 35 5593.3566 -0.469328 0.286831
C.GO02.BHZ. 2023-09-11T09:29:47.58 10.0 positive automatic P 235 5490.837 0.115836 0.372952
IV.LPDG.HHZ. 2023-09-11T09:29:46.09 10.0 positive automatic P 42 5544.1947 -4.60158 0.186958
RD.EPF.BHZ. 2023-09-11T09:29:38.86 10.0 positive automatic P 26 5371.3011 -0.0230875 0.286778
IU.TSUM.BHZ.00 2023-09-11T09:29:31.80 10.0 positive automatic P 117 5236.2918 2.43508 0.395796
ES.EPOB.HHZ. 2023-09-11T09:29:30.62 10.0 positive automatic P 28 5259.9015 -0.508927 0.208747
GT.LPAZ.BHZ.00 2023-09-11T09:29:12.68 10.0 positive automatic P 246 4986.3198 1.4652 0.223437
IU.PAB.BHZ.00 2023-09-11T09:29:00.85 10.0 positive automatic P 24 4831.2417 -0.142353 0.449288
GT.CPUP.BHZ.00 2023-09-11T09:28:35.38 10.0 positive automatic P 226 4502.9703 0.247907 0.554587
LX.MORF.BHZ. 2023-09-11T09:28:31.39 10.0 positive automatic P 22 4428.7224 -0.261976 0.528749
IU.SAML.BHZ.00 2023-09-11T09:28:18.15 10.0 positive automatic P 254 4250.4231 1.88682 0.60782
G.TAM.BHZ.00 2023-09-11T09:28:13.50 10.0 positive automatic P 52 4187.9523 -0.0182996 0.587145
WM.TIO.BHZ. 2023-09-11T09:27:48.95 10.0 positive automatic P 29 3885.8325 -0.497716 0.169829
BL.PMNB.HHZ. 2023-09-11T09:26:46.14 10.0 positive automatic P 225 3091.8828 -0.321155 0.943396
G.MPG.BHZ.00 2023-09-11T09:26:38.90 10.0 positive automatic P 280 2992.6932 0.440356 0.909091
GT.DBIC.BHZ.00 2023-09-11T09:25:49.43 10.0 positive automatic P 74 2430.6114 1.15457 1.42025
II.SACV.BHZ.00 2023-09-11T09:24:18.90 10.0 positive automatic P 9 1599.6543 -1.54257 0.987654
IU.RCBR.BHZ.00 2023-09-11T09:23:42.52 10.0 positive automatic P 236 1318.6356 -3.32062 1.4918
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download