Facebook bug unblocks unwanted connections for a bit

In this March 29, 2018, file photo, the logo for Facebook appears on screens at the Nasdaq MarketSite in New York's Times Square. (AP)
Updated 03 July 2018
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Facebook bug unblocks unwanted connections for a bit

  • While someone who was unblocked could not see content shared with friends, they could have seen things posted to a wider audience
  • People affected by the bug will get notifications encouraging them to check their blocked lists

SAN FRANCISCO: Facebook on Monday said it is notifying more than 800,000 users that a software bug temporarily unblocked people at the social network and its Messenger service.
The glitch active between May 29 and June 5 has been fixed, according to Facebook, which has been striving to regain trust in the aftermath of a Cambridge Analytica data privacy scandal.
“We know that the ability to block someone is important,” Facebook chief privacy officer Erin Egan said in a blog post.
“We’d like to apologize and explain what happened.”
Blocking someone on Facebook prevents them from seeing posts in a blocker’s profile; connecting as a friend, or starting Messenger conversations.
Blocking someone also automatically “unfriends” the person.
“There are many reasons why people block another person on Facebook,” Egan said.
“Their relationship may have changed or they may want to take a break from someone posting content they find annoying.”
People are blocked for harsher reasons, such as harassment or bullying, Egan added.
The software bug did not restore any severed friend connections at the social network, but someone who was blocked could have been able to reach out to a blocker on Messenger, according to Facebook.
“While someone who was unblocked could not see content shared with friends, they could have seen things posted to a wider audience,” Egan said of the glitch.
The vast majority of the more than 800,000 people affected by the bug had only one person they had blocked be temporarily unblocked, according to Facebook.
People affected by the bug will get notifications encouraging them to check their blocked lists.
Facebook chief Mark Zuckerberg earlier this year was grilled by the European Parliament and the US Congress about a massive breach of users’ personal data in the Cambridge Analytica scandal.
Facebook admitted that up to 87 million users may have had their data hijacked by British consultancy Cambridge Analytica, which worked for US President Donald Trump during his 2016 campaign.


NASA probe detects likely ‘marsquake’ — an interplanetary first

A life-size model of the spaceship Insight, NASA's first robotic lander dedicated to studying the deep interior of Mars, is shown at Jet Propulsion Laboratory (JPL) in Pasadena, California, U.S. November 26, 2018. (REUTERS)
Updated 24 April 2019
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NASA probe detects likely ‘marsquake’ — an interplanetary first

  • A more distant quake would yield greater information about Mars’ interior because seismic waves would “penetrate deeper into the planet before they come back up to the seismometer,” he said

CALIFORNIA: NASA’s robotic probe InSight has detected and measured what scientists believe to be a “marsquake,” marking the first time a likely seismological tremor has been recorded on another planet, the Jet Propulsion Laboratory in California reported on Tuesday.
The breakthrough came nearly five months after InSight, the first spacecraft designed specifically to study the deep interior of a distant world, touched down on the surface of Mars to begin its two-year seismological mission on the red planet.
The faint rumble characterized by JPL scientists as a likely marsquake, roughly equal to a 2.5 magnitude earthquake, was recorded on April 6 — the lander’s 128th Martian day, or sol.
It was detected by InSight’s French-built seismometer, an instrument sensitive enough to measure a seismic wave just one-half the radius of a hydrogen atom.
“We’ve been collecting background noise up until now, but this first event officially kicks off a new field: Martian seismology,” InSight principal investigator Bruce Banerdt said in a news release.
Scientists are still examining the data to conclusively determine the precise cause of the signal, but the trembling appeared to have originated from inside the planet, as opposed to being caused by forces above the surface, such as wind.
“The high frequency level and broad band is very similar to what we get from a rupture process. So we are very confident that this is a marsquake,” Philippe Lognonné, a geophysics and planetary science professor at University Paris Diderot in France and lead researcher for InSight’s seismometer, said in an email.
Still, a tremor so faint in Southern California would be virtually lost among the dozens of small seismic crackles that occur there every day.
“Our informed guesswork is that this a very small event that’s relatively close, maybe from 50 to 100 kilometers away” from the lander, Banerdt told Reuters by telephone.
A more distant quake would yield greater information about Mars’ interior because seismic waves would “penetrate deeper into the planet before they come back up to the seismometer,” he said.
 
The size and duration of the marsquake also fit the profile of some of the thousands of moonquakes detected on the lunar surface between 1969 and 1977 by seismometers installed there by NASA’s Apollo missions, said Lori Glaze, planetary science division director at NASA headquarters in Washington.
The lunar and Martian surfaces are extremely quiet compared with Earth, which experiences constant low-level seismic noise from oceans and weather as well as quakes that occur along subterranean fault lines created by shifting tectonic plates in the planet’s crust.
Mars and the moon lack tectonic plates. Their seismic activity is instead driven by a cooling and contracting process that causes stress to build up and become strong enough to rupture the crust.
Three other apparent seismic signals were picked up by InSight on March 14, April 10 and April 11 but were even smaller and more ambiguous in origin, leaving scientists less certain they were actual marsquakes.
Lognonné said he expected InSight to eventually detect quakes 50 to 100 times larger than the April 6 tremor.