A joint inversion of receiver function and Rayleigh wave phase velocity dispersion data to estimate crustal structure in West Antarctica

first_imgWe determine crustal shear-wave velocity structure and crustal thickness at recently deployed seismic stations across West Antarctica, using a joint inversion of receiver functions and fundamental mode Rayleigh wave phase velocity dispersion. The stations are from both the UK Antarctic Network (UKANET) and Polar Earth Observing Network/Antarctic Network (POLENET/ANET). The former include, for the first time, 4 stations along the spine of the Antarctic Peninsula, 3 in the Ellsworth Land and 5 stations in the vicinity of the Pine Island Rift. Within the West Antarctic Rift System (WARS) we model a crustal thickness range of 18-28 km, and show that the thinnest crust (∼18 km) is in the vicinity of the Byrd Subglacial Basin and Bentley Subglacial Trench. In these regions we also find the highest ratio of fast (Vs = 4.0-4.3 km/s) (likely mafic) lower crust to felsic/intermediate upper crust. The thickest mafic lower crust we model is in Ellsworth Land, a critical area for constraining the eastern limits of the WARS. Although we find thinner crust in this region (∼30 km) than in the neighbouring Antarctic Peninsula and Haag-Ellsworth Whitmore block (HEW), the Ellsworth Land crust has not undergone as much extension as the central WARS. This suggests that the WARS does not link with the Weddell Sea Rift System through Ellsworth Land, and instead has progressed during its formation towards the Bellingshausen and Amundsen Sea Embayments. We also find that the thin WARS crust extends towards the Pine Island Rift, suggesting that the boundary between the WARS and the Thurston Island block lies in this region, ∼200 km north of its previously accepted position. The thickest crust (38-40 km) we model in this study is in the Ellsworth Mountain section of the HEW block. We find thinner crust (30-33 km) in the Whitmore Mountains and Haag Nunatak sectors of the HEW, consistent with the composite nature of the block. In the Antarctic Peninsula we find a crustal thickness range of 30-38 km and a likely dominantly felsic/intermediate crustal composition. By forward modelling high frequency receiver functions we also assess if any thick, low velocity subglacial sediment accumulations are present, and find a 0.1-0.8 km thick layer at 10 stations within the WARS, Thurston Island and Ellsworth Land. We suggest that these units of subglacial sediment could provide a source region for the soft basal till layers found beneath numerous outlet glaciers, and may act to accelerate ice flow.last_img read more

Kimanzi appointed Harambee Stars U23 coach

first_img0Shares0000Kimanzi returns to the national team set up for the first time since 2012 when he was axed as the Harambee Stars senior team coach on his second stint after a 1-0 loss to Togo in an African Cup of Nations qualifier.NAIROBI, Kenya, Mar 9- Though on short-term, Football Kenya Federation (FKF) has appointed Mathare United head coach Francis Kimanzi to head the national under-23 team’s technical bench for a friendly match against Uzbekistan on March 22.Kimanzi returns to the national team set up for the first time since 2012 when he was axed as the Harambee Stars senior team coach on his second stint after a 1-0 loss to Togo in an African Cup of Nations qualifier. “He (Kimanzi) will be in charge of the Under-23 team for this game only against Uzbekistan and we will review the position on whether to retain him on permanent after that game. He will be charged with constituting his own technical bench,” FKF CEO Robert Muthomi told Capital Sport.Mathare United head coach Francis Kimanzi issues out instructions during a training session at teh Goan Institute on January 30, 2017. PHOTO/Timothy OlobuluKimanzi, speaking to Capital Sport says he is delighted with the opportunity to work with the youngsters.“I am delighted of course with the recognition especially after the work we put up at Mathare United last year. It shows that alot can be achieved if we have faith in the youth and this is also a good project because it will increase the depth of the national team,” Kimanzi said.He has also added that he will be ready to step in when called upon even after the Uzbekistan match.“I am available of course if my services are needed at any other time after this because unlike club football the national team has games only once in a while,” the tactician offered.He also added that the team which will be selected as the friendly approaches will hugely hinge on the impending 2019 African Under-23 Championship Qualifiers which are scheduled to kick-off either by end of this year or early next year.The top three teams from the Under-23 Championship will qualify for the 2020 Olympics in Tokyo, Japan.-Okumbi remains in charge-Harambee Stars first coach Stanley Okumbi looks on during a training session at the Kenyatta Stadium in Machakos on June 7, 2017. PHOTO/Raymond MakhayaMeanwhile, Stanley Okumbi will remain in charge of the senior national team until the federation settles on a new coach, something that might happen before May.Okumbi will take charge of the team for the upcoming two friendly matches in Morocco.Kenya is scheduled to play against Comoros on March 24 in Marakech while a second friendly will be confirmed for the 27th after Gambia pulled out.Harambee Stars players line up for a group photo before their CECAFA Senior Challenge Cup semi-final against Burundi on December 14, 2017. PHOTO/Timothy Olobulu“We are just looking to finish signing the contracts then we will make it public who we are playing. Stanley will be in charge of these two games because we felt it would have been too early to have a new coach by now after Put’s (Paul) exit,” Muthomi said.According to the federation, more than 100 coaches have expressed interest and sent their portfolios to be considered for the job.-U23 squad-Meanwhile, Kimanzi who will be assisted by KCB head coach John Kamau has already drafted a squad for the friendly match.Full SquadGoalkeepersTimothy Odhiambo (Ulinzi Stars), Job Ochieng (Mathare United)DefendersMike Kibwage (AFC Leopards), Joseph Okumu (Unattached), Benard Ochieng (Vihiga United), Bolton Owenga (Kariobangi Sharks), David Owino (Mathare United)MidfieldersTeddy Osok (Sofapaka), Sven Yidah (Kariobangi Sharks), Siraji Mohammed (Bandari), Chrispinus Onyango (KCB), Abdalla Ahmad Ahmed (Mathare United), Ibrahim Shambi (Ulinzi Stars), Amai Atariza (Bandari), Juma Henry (Kariobangi Sharks)ForwardsBrian Yator (KCB), Okoth Daniel Otieno (Sony Sugar), James Mazembe (Kariobangi Sharks), Jafari Owitti (AFC Leopards), Vincent Oburu (AFC Leopards), Pistone Mutamba (Wazito FC)0Shares0000(Visited 8 times, 1 visits today)last_img read more

IRISH NAVY REINFORCES OUR CLAIM TO ROCKALL OFF DONEGAL COAST

first_imgThe Irish navy has helped Ireland reinforce its claim to Rockall – the rocky outcrop off the coast of Donegal.It’s claimed by the British, the Danes and the Icelanders but the Irish Navy has again laid claim to the hotly contested outcrop.The navy ship LE Roisin exercised Ireland’s sovereign rights over the plot this week in a “showing the flag” patrol. The rock lies 230 nautical miles northwest of Bloody Foreland.It may only be a dot in the Atlantic, but ownership of the tiny island – which rises 70ft out of the ocean and is a mere 83ft across – is hotly contested given its location.That’s because it sits on what is believed to be vast oil and gas fields worth billions of euro.The Defence Forces said the Irish Naval Service routinely conducts maritime security patrols to exercise Ireland’s sovereign rights. In 1955 the British announced they had landed a party on Rockall and taken possession of it in the name of Queen Elizabeth. A flagpole was erected, the Union Jack hoisted and a commemorative plaque bolted to the granite. IRISH NAVY REINFORCES OUR CLAIM TO ROCKALL OFF DONEGAL COAST was last modified: October 13th, 2012 by StephenShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window) Tags:Bloody ForelandDonegal coastLE Roisinrockalllast_img read more

Nuggets’ Juancho Hernangomez undergoes core muscle surgery

first_imgLATEST STORIES Cayetano: Senate, Drilon to be blamed for SEA Games mess Don’t miss out on the latest news and information. PH underwater hockey team aims to make waves in SEA Games PLAY LIST 02:42PH underwater hockey team aims to make waves in SEA Games01:44Philippines marks anniversary of massacre with calls for justice01:19Fire erupts in Barangay Tatalon in Quezon City01:07Trump talks impeachment while meeting NCAA athletes02:49World-class track facilities installed at NCC for SEA Games02:11Trump awards medals to Jon Voight, Alison Krauss Catholic schools seek legislated pay hike, too Two-day strike in Bicol fails to cripple transport DA eyes importing ‘galunggong’ anew Sports Related Videospowered by AdSparcRead Next Duterte wants probe of SEA Games mess View comments ‘Rebel attack’ no cause for concern-PNP, AFP Cavs guard Collin Sexton believes NBA hopeful Kai Sotto is going to be a lot better Ethel Booba twits Mocha over 2 toilets in one cubicle at SEA Games venue MOST READ Private companies step in to help SEA Games hosting Hernangomez averaged 5.8 points and 3.8 rebounds during the 2018-19 regular season. He played sparingly in the postseason before the Nuggets were eliminated in Game 7 of the second round by Portland.The 23-year-old Hernangomez said after the season that he was hoping to possibly suit up for Spain at the FIBA World Cup in China later this summer.FEATURED STORIESSPORTSPrivate companies step in to help SEA Games hostingSPORTSPalace wants Cayetano’s PHISGOC Foundation probed over corruption chargesSPORTSSingapore latest to raise issue on SEA Games food, logisticsHernangomez was drafted by Denver with the 15th overall pick in 2016. Denver Nuggets forward Juan Hernangomez, left, hugs Portland Trail Blazers guard CJ McCollum after Game 7 of an NBA basketball second-round playoff series Sunday, May 12, 2019, in Denver. (AP Photo/David Zalubowski)ENGLEWOOD, Colorado— The Denver Nuggets say forward Juancho Hernangomez underwent surgery to fix a core muscle injury.The procedure was performed Thursday by Dr. William Meyers at the Vincera Institute in Philadelphia. There was no timetable given for Hernangomez’s return.ADVERTISEMENTlast_img read more