Posts tagged fast
Solar eruption could be like an attack on the Earth
Dec 9th
points up need for society to prepare
A massive ejection of material from the sun initially traveling at over 7 million miles per hour that narrowly missed Earth last year is an event solar scientists hope will open the eyes of policymakers regarding the impacts and mitigation of severe space weather, says a University of Colorado Boulder professor.
The coronal mass ejection, or CME, event was likely more powerful than the famous Carrington storm of 1859, when the sun blasted Earth’s atmosphere hard enough twice to light up the sky from the North Pole to Central America and allowed New Englanders to read their newspapers at night by aurora light, said CU-Boulder Professor Daniel Baker. Had it hit Earth, the July 2012 event likely would have created a technological disaster by short-circuiting satellites, power grids, ground communication equipment and even threatening the health of astronauts and aircraft crews, he said.
CMEs are part of solar storms and can send billions of tons of solar particles in the form of gas bubbles and magnetic fields off the sun’s surface and into space. The storm events essentially peel Earth’s magnetic field like an onion, allowing energetic solar wind particles to stream down the field lines to hit the atmosphere over the poles.
Fortunately, the 2012 solar explosion occurred on the far side of the rotating sun just a week after that area was pointed toward Earth, said Baker, a solar scientist and the director of CU-Boulder’s Laboratory for Atmospheric and Space Physics. But NASA’s STEREO-A, satellite that was flying ahead of the Earth as the planet orbited the sun, captured the event, including the intensity of the solar wind, the interplanetary magnetic field and a rain of solar energetic particles into space.
“My space weather colleagues believe that until we have an event that slams Earth and causes complete mayhem, policymakers are not going to pay attention,” he said. “The message we are trying to convey is that we made direct measurements of the 2012 event and saw the full consequences without going through a direct hit on our planet.”
Baker will give a presentation on the subject at the 46th Annual Fall Meeting of the American Geophysical Union held in San Francisco Dec. 9 to Dec. 13.
While typical coronal mass ejections from the sun take two or three days to reach Earth, the 2012 event traveled from the sun’s surface to Earth in just 18 hours. “The speed of this event was as fast or faster than anything that has been seen in the modern space age,” said Baker. The event not only had the most powerful CME ever recorded, but it would have triggered one of the strongest geomagnetic storms and the highest density of particle fluctuation ever seen in a typical solar cycle, which last roughly 11 years.
“We have proposed that the 2012 event be adopted as the best estimate of the worst case space weather scenario,” said Baker, who chaired a 2008 National Research Council committee that produced a report titled Severe Space Weather Events – Understanding Societal and Economic Impacts. “We argue that this extreme event should be immediately employed by the space weather community to model severe space weather effects on technological systems such as the electrical power grid.
“I liken it to war games — since we have the information about the event, let’s play it through our various models and see what happens,” Baker said. “If we do this, we would be a significant step closer to providing policymakers with real-world, concrete kinds of information that can be used to explore what would happen to various technologies on Earth and in orbit rather than waiting to be clobbered by a direct hit.”
Even though it occurred about 150 years ago, the Carrington storm was memorable from a natural beauty standpoint as well as its technological impacts, he said. The event disrupted telegraph communications — the Internet of the Victorian Age — around the world, sparking fires at telegraph offices that caused several deaths, he said.
A 1989 geomagnetic storm caused by a CME from a solar storm in March 1989 resulted in the collapse of Hydro-Quebec’s electricity transmission system, causing 6 million people to lose power for at least nine hours, said Baker. The auroras from the event could be seen as far south as Texas and Florida.
“The Carrington storm and the 2012 event show that extreme space weather events can happen even during a modest solar cycle like the one presently underway,” said Baker. “Rather than wait and pick up the pieces, we ought to take lessons from these events to prepare ourselves for inevitable future solar storms.”
CU media release.
It wasn’t pretty but #11 CU women stay undefeated
Dec 8th
And a strange afternoon of hoops in Boulder, but strange was good. The No. 11 Colorado women remained unbeaten with a 79-56 win over Illinois, but it was anything but business as usual in the Coors Events Center.
For starters, the Buffs (8-0) and Illini (5-5) had their pregame warm-up time shortened due to the aftermath of the CU’s men’s last-second upset of No. 6 Kansas. That game started at 1:20 p.m., with the women’s contest scheduled to begin just after 5 p.m. But it took longer than anticipated to clear the CEC court after it was stormed by CU students and fans following the electrifying 75-72 win.
Then, with 8:30 left in the first half of the women’s contest and the Buffs up 27-20, alarms sounded in the CEC. Play continued, but after a couple of possessions, the court and stands were cleared. A sprinkler head had burst in the loading dock area of the Events Center, triggering the alarms and stopping play for 20 minutes. Players went to their locker rooms, fans went to the building’s upper concourses.
Meanwhile, second-year Illinois coach Matt Bollant might not have known what he was missing. He was ill and remained at his Boulder hotel, which made associate head coach Mike Divilbiss the head man for the afternoon.
“There’s not much you can say in that situation,” Divilbiss said of the delay. “We’re a young team and it’s just one of those things – you just have to learn to get past the environment.”
Once back on the court, Illinois guard Amber Moore got a quick score but the Buffaloes quickly went up by double-digits for the first time on a three-pointer by Jen Reese (16 points) and a jumper byRachel Hargis (12) for a 32-22 lead.
Forward Jacqui Grant (game-high 20) helped keep Illinois close. When the Illini cooled off from the outside, they started going in and the 6-3 freshman scored four of her 15-first half points on a run that cut Colorado’s lead to 40-35.
But Lauren Huggins hit another 3-pointer and Hargis matched an Illinois score with a layup of her own to give the Buffaloes a 45-37 halftime advantage.
Reese hit her first three field goals of the second half as the Buffs built their lead to 20. A Jasmine Sborov trey and a soft Hargis layup pushed CU in front 62-42. But Illinois increased its press, contributing to the Buffs’ 20 turnovers, and crept to within 14 (62-48).
CU finally settled down as Sborov (10) hit a three-pointer at the 7:56 mark to push the lead back to 17 and the Illini were done.
“I thought it was a great win for our team,” CU coach Linda Lappe said, acknowledging Illinois’ athleticism, quickness and different defensive looks. “There were a lot of different obstacles and adversities through the game – not having the normal warm up time, having a fire alarm . . . I liked how we came out of being in the locker room for 15 minutes and got back into it. So, there were a lot of positives to take out of it.”
Once again, the Buffs’ balance was apparent. Four players, topped by Arielle Roberson’s 17, reached double figures and 10 of the players used by coach Linda Lappe scored. The Buffs outrebounded the Illini 51-30 and held the visitors to 30.8 percent shooting from the field (20-of-65).
In addition to her seven points, senior guard Brittany Wilson set career highs in assists (eight) and rebounds (13) and tied a career-best with three blocked shots.
“The ball just kept falling in my hands I guess and I just jumped up for rebounds and pushed the ball down the floor,” Wilson said. “I found open teammates – one being Jen Reese.”
CU committed 21 turnovers to Illinois’ 14, but Wilson said given the Illini’s average of forcing 26, the Buffs will take their 21 and move on. “You don’t want to have 21 turnovers a game,” she said, “but we won, so hey.”
Reese, who sat out the Wyoming game on Wednesday night with concussion symptoms a broken nose, said her fast start “was good to get the confidence up. Even if I did miss it, it’s short memory. But it was good to come back and it felt good.”
The Buffs are off until Thursday, when they host the University of Denver (7 p.m.).
WBB: Two top recruits sign letters of intent to CU
Dec 1st
BOULDER – Zoe Correal and Brecca Thomas have signed National Letters of Intent to play basketball and continue their education at the University of Colorado in 2014-15 head coach Linda Lappe announced on Wednesday, the first day of the NCAA’s early signing period.
“We are very excited about having Brecca and Zoe in the Buff family,” head coach Linda Lappe said. “They are great people first and foremost and will bring a lot of valuable skills to the University of Colorado both on and off the court. They have competed and won at a high level in their high school and club programs and have proven to be successful all around.”
Correal, a 6-foot, 4-inch center from El Cerrito, Calif., is gearing up for her senior season at Salesian High School a program where she has contributed to the last two NorCal Division IV titles.
“Zoe is a bona fide center who will get up and down the floor quickly and give us another big presence in the post,” Lappe said. “She has worked hard over her high school career and continues to get better each year.”
She averaged 9.4 points, 7.6 rebounds and 2.4 blocks as a junior, guiding the Pride to a 29-8 record, the NorCal title and runner-up finish at the 2013 CIF Division IV State Tournament.
“I’ll be ready to work,” Correal said. “I’ll give it all I have. I will bring my defense and will be working on my offensive game, getting ready for the bigs in the Pac-12 that can shoot. I’m excited to show everyone what I’ve got.”
Correal was named to the 2012-13 Cal-Hi Sports Division IV All-State Second Team. As a sophomore in 2011-12, she averaged 3.5 points and 4.0 rebounds on a 31-5 squad which also advanced to the Division IV state finals. Rated as the No. 46 post player in the nation by ESPN HoopGurlz, Correal also played for the CA Ballaz club program. She’s interested in pursuing psychology as a major.
“I’m really excited to get to Colorado,” Correal said. “(On my visit) I went to a psychology class with (current senior Rachel Hargis), it was an advanced class so I didn’t quite understand it, but knew I could do this. Everything is beautiful out there, the brick buildings on campus, and the mountains took me off guard, how pretty it was out there.”
Thomas, a 5-5 point guard from Houston, is entering her senior season at the Kinkaid School, a winning program in its own right. She has scored nearly 1,700 points and dished out over 400 assists in three years for the Falcons who have won back-to-back Southwest Preparatory Conference Division I titles.
“Brecca is going to be an exciting player as she plays with a lot of heart and energy,” Lappe said. “She will help us in the guard position as she has a tremendous skill set and is truly a triple threat player.”
A three-time All-SPC Division I selection, Thomas averaged 20.6 points, 5.5 assists and 3.5 steals as a junior, leading the Falcons to a 28-5 record. She hit 47 percent from the field (247-of-528) and was even more accurate from 3-point range, shooting 51 percent (72-of-141).
“Brecca is such a student of the game,” Kinkaid head coach Stacey Marshall said. “Both off the court and with her practice habits, she has an incredible skill set…kind of a once in a lifetime player.”
Thomas averaged 17.3 points, 4.2 steals and 3.8 assists as a sophomore as the Falcons finished 31-3, setting a school record for wins and claiming their first of two straight SPC crowns. She hopes to bring leadership as a point guard and a fast pace to her new teammates next year, who she’s already connected with.
“Everyone is so friendly and (Colorado) is a nice atmosphere,” Thomas said on her visit this past October. “It’s a great group of girls and coaching staff. I feel safe with them. And in academics my planned major (marketing), Colorado is a good school, so I really liked that.”
Colorado, ranked No. 17 in the latest Associated Press Top 25 Poll, will host Alcorn State in its home opener on Friday, Nov. 15, at 7 p.m. at the Coors Events Center.