Technologies

There’s a Growing Weak Spot in Earth’s Magnetic Field. What it Means

The weak spot has been known about for over half a century, but it’s now getting bigger.

It would be an understatement to say that the Earth’s magnetic field is important. It’s one of the reasons we’re able to live on this rock tumbling through space, and it also gives us the gorgeous aurora borealis. So it’s a pretty big deal when it changes — and such a change is occurring right now in the South Atlantic Ocean, where the magnetic field’s weakest point appears to be growing.

The European Space Agency spent 11 years studying the magnetic field via the agency’s Swarm operation. Part of the mission was to measure and observe the South Atlantic Anomaly, a pronounced weak spot in the Earth’s magnetic field that sits over South America. This was originally discovered in 1958 when satellites first started measuring radiation around the Earth, so its existence is nothing new.

However, data from the Swarm mission shows that the weak spot has been rapidly growing, extending its presence across the Atlantic Ocean toward Africa.

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Why is the weak spot growing?

Per the ESA, this phenomenon can be best explained by strange behaviors far within the Earth at the boundary where the Earth’s liquid outer core meets the rocky mantle layer. This boundary, referred to as reverse flux patches, is acting funny and causing the magnetic field to weaken in that one spot.

«Normally, we’d expect to see magnetic field lines coming out of the core in the southern hemisphere,» says C.C. Finlay, lead author of the study and professor of geomagnetism at the Technical University of Denmark. «But beneath the South Atlantic Anomaly, we see unexpected areas where the magnetic field, instead of coming out of the core, goes back into the core. Thanks to the Swarm data, we can see one of these areas moving westward over Africa, which contributes to the weakening of the South Atlantic Anomaly in this region.»

In addition to the South Atlantic Anomaly, the Swarm mission also showed that a stronger section of the magnetic field over Canada was also getting weaker, while the one over Siberia was getting stronger.

A danger to satellites everywhere

The weakened zone won’t have a significant impact on humans, as the atmosphere primarily deals with the elements that affect the Earth’s surface. As NASA says, the weakening is still within what scientists consider «normal variation,» so daily life isn’t affected.

However, things in low Earth orbit aren’t so lucky. Per the ESA, satellites and other spacecraft passing through the region will face higher radiation exposure that «can lead to malfunctions or damage to critical hardware, and even blackouts.»

As Finlay notes in the study, space agencies take the SAA into consideration when building modern spacecraft, satellites and other space-worthy technology, so not only are existing satellites at risk of damage, but the expanding weak spot will also affect how future satellites and spacecraft are designed.

The ESA says that the Swarm mission will continue to gather data about the Earth’s magnetic field into the foreseeable future.

«It’s really wonderful to see the big picture of our dynamic Earth thanks to Swarm’s extended timeseries,» says ESA Swarm Mission Manager Anja Stromme. «The satellites are all healthy and providing excellent data, so we can hopefully extend that record beyond 2030, when the solar minimum will allow more unprecedented insights into our planet.»

Technologies

Wisconsin Reverses Decision to Ban VPNs in Age-Verification Bill

The law would have required websites to block VPN users from accessing «harmful material.»

Following a wave of criticism, Wisconsin lawmakers have decided not to include a ban on VPN services in their age-verification law, making its way through the state legislature.

Wisconsin Senate Bill 130 (and its sister Assembly Bill 105), introduced in March 2025, aims to prohibit businesses from «publishing or distributing material harmful to minors» unless there is a reasonable «method to verify the age of individuals attempting to access the website.»

One provision would have required businesses to bar people from accessing their sites via «a virtual private network system or virtual private network provider.»

A VPN lets you access the internet via an encrypted connection, enabling you to bypass firewalls and unblock geographically restricted websites and streaming content. While using a VPN, your IP address and physical location are masked, and your internet service provider doesn’t know which websites you visit.

Wisconsin state Sen. Van Wanggaard moved to delete that provision in the legislation, thereby releasing VPNs from any liability. The state assembly agreed to remove the VPN ban, and the bill now awaits Wisconsin Governor Tony Evers’s signature.

Rindala Alajaji, associate director of state affairs at the digital freedom nonprofit Electronic Frontier Foundation, says Wisconsin’s U-turn is «great news.»

«This shows the power of public advocacy and pushback,» Alajaji says. «Politicians heard the VPN users who shared their worries and fears, and the experts who explained how the ban wouldn’t work.»

Earlier this week, the EFF had written an open letter arguing that the draft laws did not «meaningfully advance the goal of keeping young people safe online.» The EFF said that blocking VPNs would harm many groups that rely on that software for private and secure internet connections, including «businesses, universities, journalists and ordinary citizens,» and that «many law enforcement professionals, veterans and small business owners rely on VPNs to safely use the internet.»

VPNs can also help you get around age-verification laws — for instance, if you live in a state or country that requires age verification to access certain material, you can use a VPN to make it look like you live elsewhere, thereby gaining access to that material. As age-restriction laws increase around the US, VPN use has also increased. However, many people are using free VPNs, which are fertile ground for cybercriminals.

In its letter to Wisconsin lawmakers prior to the reversal, the EFF argued that it is «unworkable» to require websites to block VPN users from accessing adult content. The EFF said such sites cannot «reliably determine» where a VPN customer lives — it could be any US state or even other countries.

«As a result, covered websites would face an impossible choice: either block all VPN users everywhere, disrupting access for millions of people nationwide, or cease offering services in Wisconsin altogether,» the EFF wrote.

Wisconsin is not the only state to consider VPN bans to prevent access to adult material. Last year, Michigan introduced the Anticorruption of Public Morals Act, which would ban all use of VPNs. If passed, it would force ISPs to detect and block VPN usage and also ban the sale of VPNs in the state. Fines could reach $500,000.

Technologies

Today’s NYT Strands Hints, Answers and Help for Feb. 21 #720

Here are hints and answers for the NYT Strands puzzle for Feb. 21, No. 720.

Looking for the most recent Strands answer? Click here for our daily Strands hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections and Connections: Sports Edition puzzles.

Today’s NYT Strands puzzle might be easy for those who pursue a certain hobby. Some of the answers are difficult to unscramble, so if you need hints and answers, read on.

I go into depth about the rules for Strands in this story.

If you’re looking for today’s Wordle, Connections and Mini Crossword answers, you can visit CNET’s NYT puzzle hints page.

Read more: NYT Connections Turns 1: These Are the 5 Toughest Puzzles So Far

Hint for today’s Strands puzzle

Today’s Strands theme is: The beer necessities.

If that doesn’t help you, here’s a clue: Cheers!

Clue words to unlock in-game hints

Your goal is to find hidden words that fit the puzzle’s theme. If you’re stuck, find any words you can. Every time you find three words of four letters or more, Strands will reveal one of the theme words. These are the words I used to get those hints but any words of four or more letters that you find will work:

MALE, TREAT, STEAM, TEAM, MOVE, LOVE, ROVE, ROVER, SPEAR, PEAR

Answers for today’s Strands puzzle

These are the answers that tie into the theme. The goal of the puzzle is to find them all, including the spangram, a theme word that reaches from one side of the puzzle to the other. When you have all of them (I originally thought there were always eight but learned that the number can vary), every letter on the board will be used. Here are the nonspangram answers:

HOPS, WATER, MALT, YEAST, BARLEY, SUGAR, WHEAT, FLAVOR

Today’s Strands spangram

Today’s Strands spangram is HOMEBREW. To find it, start with the H that’s three letters to the right on the top row, and wind down.

Technologies

Today’s NYT Connections Hints, Answers and Help for Feb. 21, #986

Here are some hints and the answers for the NYT Connections puzzle for Feb. 21 #986.

Looking for the most recent Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections: Sports Edition and Strands puzzles.

Today’s NYT Connections puzzle features another of those purple categories where you need to look for hidden words inside of other words. It can be a real stumper. Read on for clues and today’s Connections answers.

The Times has a Connections Bot, like the one for Wordle. Go there after you play to receive a numeric score and to have the program analyze your answers. Players who are registered with the Times Games section can now nerd out by following their progress, including the number of puzzles completed, win rate, number of times they nabbed a perfect score and their win streak.

Read more: Hints, Tips and Strategies to Help You Win at NYT Connections Every Time

Hints for today’s Connections groups

Here are four hints for the groupings in today’s Connections puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Rookies don’t have this.

Green group hint: Call the roll.

Blue group hint: How’d you do today?

Purple group hint: Vroom-vroom, but with a twist.