Scientists say a formation about 1,000km under the surface of Africa may be the reason for its violent geology.
The African blob is one of two discovered in the 1970s, with little known about the anomalous objects.
But now researchers from Arizona State University have published a study saying the blob may help explain why the continent has experienced so many large supervolcano eruptions.
The two blobs in the lower mantle, one beneath Africa and the other beneath the Pacific Ocean, were found using seismic observations.
Now scientists have found the African blob extends far closer to the surface and is more unstable.
But what is it and how did it get there?
What is the African blob?
It is not known exactly what the blob is made of, though recycled oceanic crust or iron-rich material are among the theories.
It is one of two giant blobs sitting deep within Earth's mantle — the second sitting almost directly opposite the first under the Pacific Ocean.
They are known as large low-shear-wave-velocity provinces.
The mantle blobs get their name because when seismic waves generated by earthquakes travel through these deep-mantle zones, the waves slow down, indicating a difference in the mantle such as density or temperature.
What caused the blobs?
Scientists are not sure why the blobs exist, though there are two popular hypotheses, Qian Yuan, a graduate associate in geology at Arizona State University, who led the research, told science news site Live Science.
The first is that they consist of accumulations of crust that have been pushed from the surface to deep in the mantle by tectonic plate convergence.
The second theory is that they are what is left of an ocean of magma that may have existed in the lower mantle during Earth's early history, which has cooled and crystallised, leaving denser areas than the rest of the mantle.
How are the two blobs different?
The African blob extends about 1,000 kilometres higher than the Pacific blob. It extends about 1,600 to 1,800km upwards from the boundary between the core and the mantle, while the Pacific blob extends about 700 to 800km.
Research shows the two blobs differ in density, with the African blob found to be less dense, or less stable.
And the African blob is rising. But with a speed of about 1cm to 2cm a year, it would take 50 to 100 million years for it to reach the surface, researcher Mingming Li told Newsweek.
How could the African blob affect Earth’s surface?
The difference could help to explain why the crust under Africa has been lifted upwards and why the continent has seen so many large supervolcano eruptions over hundreds of millions of years.
"This instability can have a lot of implications for the surface tectonics, and also earthquakes and supervolcanic eruptions," said Mr Yuan.
Despite the African blob’s distance from the Earth's crust ― and the fact the planet’s mantle is 2,900km thick — scientists think the blob’s instability could affect the planet's surface because large low-shear-wave-velocity provinces may be a source of hot plumes, which could cause supervolcano eruptions, tectonic upheaval or even continental break-up, Mr Yuan said.
The Cairo Statement
1: Commit to countering all types of terrorism and extremism in all their manifestations
2: Denounce violence and the rhetoric of hatred
3: Adhere to the full compliance with the Riyadh accord of 2014 and the subsequent meeting and executive procedures approved in 2014 by the GCC
4: Comply with all recommendations of the Summit between the US and Muslim countries held in May 2017 in Saudi Arabia.
5: Refrain from interfering in the internal affairs of countries and of supporting rogue entities.
6: Carry out the responsibility of all the countries with the international community to counter all manifestations of extremism and terrorism that threaten international peace and security
The specs
Engine: 2.0-litre 4-cyl turbo
Power: 201hp at 5,200rpm
Torque: 320Nm at 1,750-4,000rpm
Transmission: 6-speed auto
Fuel consumption: 8.7L/100km
Price: Dh133,900
On sale: now
The smuggler
Eldarir had arrived at JFK in January 2020 with three suitcases, containing goods he valued at $300, when he was directed to a search area.
Officers found 41 gold artefacts among the bags, including amulets from a funerary set which prepared the deceased for the afterlife.
Also found was a cartouche of a Ptolemaic king on a relief that was originally part of a royal building or temple.
The largest single group of items found in Eldarir’s cases were 400 shabtis, or figurines.
Khouli conviction
Khouli smuggled items into the US by making false declarations to customs about the country of origin and value of the items.
According to Immigration and Customs Enforcement, he provided “false provenances which stated that [two] Egyptian antiquities were part of a collection assembled by Khouli's father in Israel in the 1960s” when in fact “Khouli acquired the Egyptian antiquities from other dealers”.
He was sentenced to one year of probation, six months of home confinement and 200 hours of community service in 2012 after admitting buying and smuggling Egyptian antiquities, including coffins, funerary boats and limestone figures.
For sale
A number of other items said to come from the collection of Ezeldeen Taha Eldarir are currently or recently for sale.
Their provenance is described in near identical terms as the British Museum shabti: bought from Salahaddin Sirmali, "authenticated and appraised" by Hossen Rashed, then imported to the US in 1948.
- An Egyptian Mummy mask dating from 700BC-30BC, is on offer for £11,807 ($15,275) online by a seller in Mexico
- A coffin lid dating back to 664BC-332BC was offered for sale by a Colorado-based art dealer, with a starting price of $65,000
- A shabti that was on sale through a Chicago-based coin dealer, dating from 1567BC-1085BC, is up for $1,950
UAE currency: the story behind the money in your pockets
Analysis
Members of Syria's Alawite minority community face threat in their heartland after one of the deadliest days in country’s recent history. Read more
Killing of Qassem Suleimani
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more from Janine di Giovanni
Tearful appearance
Chancellor Rachel Reeves set markets on edge as she appeared visibly distraught in parliament on Wednesday.
Legislative setbacks for the government have blown a new hole in the budgetary calculations at a time when the deficit is stubbornly large and the economy is struggling to grow.
She appeared with Keir Starmer on Thursday and the pair embraced, but he had failed to give her his backing as she cried a day earlier.
A spokesman said her upset demeanour was due to a personal matter.
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FA Cup quarter-final draw
The matches will be played across the weekend of 21 and 22 March
Sheffield United v Arsenal
Newcastle v Manchester City
Norwich v Derby/Manchester United
Leicester City v Chelsea
Key facilities
- Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
- Premier League-standard football pitch
- 400m Olympic running track
- NBA-spec basketball court with auditorium
- 600-seat auditorium
- Spaces for historical and cultural exploration
- An elevated football field that doubles as a helipad
- Specialist robotics and science laboratories
- AR and VR-enabled learning centres
- Disruption Lab and Research Centre for developing entrepreneurial skills
The stats: 2017 Jaguar XJ
Price, base / as tested Dh326,700 / Dh342,700
Engine 3.0L V6
Transmission Eight-speed automatic
Power 340hp @ 6,000pm
Torque 450Nm @ 3,500rpm
Fuel economy, combined 9.1L / 100km
Our family matters legal consultant
Name: Hassan Mohsen Elhais
Position: legal consultant with Al Rowaad Advocates and Legal Consultants.
The advice provided in our columns does not constitute legal advice and is provided for information only. Readers are encouraged to seek independent legal advice.
Benefits of first-time home buyers' scheme
- Priority access to new homes from participating developers
- Discounts on sales price of off-plan units
- Flexible payment plans from developers
- Mortgages with better interest rates, faster approval times and reduced fees
- DLD registration fee can be paid through banks or credit cards at zero interest rates
Result
Crystal Palace 0 Manchester City 2
Man City: Jesus (39), David Silva (41)
RESULTS
6.30pm: Al Maktoum Challenge Round-1 Group 1 (PA) Dh119,373 (Dirt) 1,600m
Winner: Brraq, Adrie de Vries (jockey), Jean-Claude Pecout (trainer)
7.05pm: Handicap (TB) Dh102,500 (D) 1,200m
Winner: Taamol, Connor Beasley, Ali Rashid Al Raihe.
7.40pm: Handicap (TB) Dh105,000 (Turf) 1,800m
Winner: Eqtiraan, Connor Beasley, Ali Rashid Al Raihe.
8.15pm: UAE 1000 Guineas Trial (TB) Dh183,650 (D) 1,400m
Winner: Soft Whisper, Pat Cosgrave, Saeed bin Suroor.
9.50pm: Handicap (TB) Dh105,000 (D) 1,600m
Winner: Hypothetical, Mickael Barzalona, Salem bin Ghadayer.
9.25pm: Handicap (TB) Dh95,000 (T) 1,000m
Winner: Etisalat, Sando Paiva, Ali Rashid Al Raihe
So what is Spicy Chickenjoy?
Just as McDonald’s has the Big Mac, Jollibee has Spicy Chickenjoy – a piece of fried chicken that’s crispy and spicy on the outside and comes with a side of spaghetti, all covered in tomato sauce and topped with sausage slices and ground beef. It sounds like a recipe that a child would come up with, but perhaps that’s the point – a flavourbomb combination of cheap comfort foods. Chickenjoy is Jollibee’s best-selling product in every country in which it has a presence.
Gothia Cup 2025
4,872 matches
1,942 teams
116 pitches
76 nations
26 UAE teams
15 Lebanese teams
2 Kuwaiti teams
How to apply for a drone permit
- Individuals must register on UAE Drone app or website using their UAE Pass
- Add all their personal details, including name, nationality, passport number, Emiratis ID, email and phone number
- Upload the training certificate from a centre accredited by the GCAA
- Submit their request
What are the regulations?
- Fly it within visual line of sight
- Never over populated areas
- Ensure maximum flying height of 400 feet (122 metres) above ground level is not crossed
- Users must avoid flying over restricted areas listed on the UAE Drone app
- Only fly the drone during the day, and never at night
- Should have a live feed of the drone flight
- Drones must weigh 5 kg or less
More from Neighbourhood Watch
How to watch Ireland v Pakistan in UAE
When: The one-off Test starts on Friday, May 11
What time: Each day’s play is scheduled to start at 2pm UAE time.
TV: The match will be broadcast on OSN Sports Cricket HD. Subscribers to the channel can also stream the action live on OSN Play.
Tentative schedule of 2017/18 Ashes series
1st Test November 23-27, The Gabba, Brisbane
2nd Test December 2-6, Adelaide Oval, Adelaide
3rd Test Dcember 14-18, Waca, Perth
4th Test December 26-30, Melbourne Cricket Ground, Melbourne
5th Test January 4-8, Sydney Cricket Ground, Sydney
'Shakuntala Devi'
Starring: Vidya Balan, Sanya Malhotra
Director: Anu Menon
Rating: Three out of five stars
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if you go
PRO BASH
Thursday’s fixtures
6pm: Hyderabad Nawabs v Pakhtoon Warriors
10pm: Lahore Sikandars v Pakhtoon Blasters
Teams
Chennai Knights, Lahore Sikandars, Pakhtoon Blasters, Abu Dhabi Stars, Abu Dhabi Dragons, Pakhtoon Warriors and Hyderabad Nawabs.
Squad rules
All teams consist of 15-player squads that include those contracted in the diamond (3), platinum (2) and gold (2) categories, plus eight free to sign team members.
Tournament rules
The matches are of 25 over-a-side with an 8-over power play in which only two fielders allowed outside the 30-yard circle. Teams play in a single round robin league followed by the semi-finals and final. The league toppers will feature in the semi-final eliminator.
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Some of Darwish's last words
"They see their tomorrows slipping out of their reach. And though it seems to them that everything outside this reality is heaven, yet they do not want to go to that heaven. They stay, because they are afflicted with hope." - Mahmoud Darwish, to attendees of the Palestine Festival of Literature, 2008
His life in brief: Born in a village near Galilee, he lived in exile for most of his life and started writing poetry after high school. He was arrested several times by Israel for what were deemed to be inciteful poems. Most of his work focused on the love and yearning for his homeland, and he was regarded the Palestinian poet of resistance. Over the course of his life, he published more than 30 poetry collections and books of prose, with his work translated into more than 20 languages. Many of his poems were set to music by Arab composers, most significantly Marcel Khalife. Darwish died on August 9, 2008 after undergoing heart surgery in the United States. He was later buried in Ramallah where a shrine was erected in his honour.
Bharat
Director: Ali Abbas Zafar
Starring: Salman Khan, Katrina Kaif, Sunil Grover
Rating: 2.5 out of 5 stars
F1 The Movie
Starring: Brad Pitt, Damson Idris, Kerry Condon, Javier Bardem
Director: Joseph Kosinski
Rating: 4/5
RESULTS
Light Flyweight (48kg): Alua Balkibekova (KAZ) beat Gulasal Sultonalieva (UZB) by points 4-1.
Flyweight (51kg): Nazym Kyzaibay (KAZ) beat Mary Kom (IND) 3-2.
Bantamweight (54kg): Dina Zholaman (KAZ) beat Sitora Shogdarova (UZB) 3-2.
Featherweight (57kg): Sitora Turdibekova (UZB) beat Vladislava Kukhta (KAZ) 5-0.
Lightweight (60kg): Rimma Volossenko (KAZ) beat Huswatun Hasanah (INA) KO round-1.
Light Welterweight (64kg): Milana Safronova (KAZ) beat Lalbuatsaihi (IND) 3-2.
Welterweight (69kg): Valentina Khalzova (KAZ) beat Navbakhor Khamidova (UZB) 5-0
Middleweight (75kg): Pooja Rani (IND) beat Mavluda Movlonova (UZB) 5-0.
Light Heavyweight (81kg): Farida Sholtay (KAZ) beat Ruzmetova Sokhiba (UZB) 5-0.
Heavyweight (81 kg): Lazzat Kungeibayeva (KAZ) beat Anupama (IND) 3-2.
UK-EU trade at a glance
EU fishing vessels guaranteed access to UK waters for 12 years
Co-operation on security initiatives and procurement of defence products
Youth experience scheme to work, study or volunteer in UK and EU countries
Smoother border management with use of e-gates
Cutting red tape on import and export of food
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German intelligence warnings
- 2002: "Hezbollah supporters feared becoming a target of security services because of the effects of [9/11] ... discussions on Hezbollah policy moved from mosques into smaller circles in private homes." Supporters in Germany: 800
- 2013: "Financial and logistical support from Germany for Hezbollah in Lebanon supports the armed struggle against Israel ... Hezbollah supporters in Germany hold back from actions that would gain publicity." Supporters in Germany: 950
- 2023: "It must be reckoned with that Hezbollah will continue to plan terrorist actions outside the Middle East against Israel or Israeli interests." Supporters in Germany: 1,250
Source: Federal Office for the Protection of the Constitution
