Tag Archives: CME

Voyager 1 on the edge of the solar system

Scientists using instruments on Voyager 1 have detected three shock waves pass over the spacecraft as it moves steadily away and outside of the solar system.

The waves were sent outward when the Sun emitted a coronal mass ejection. The spacecraft has been inside the third wave now for months, something that scientists at the moment cannot explain.

The first of two coronal mass ejectors from a solar flare has arrived.

An alert has been issued so that the electrical grids can been properly prepared to avoid damage by the impact of these two coronal mass ejections (CME) against the Earth’s magnetic field.

The first of the two CMEs predicted to arrive today made its appearance right on time. G1 ((Minor) geomagnetic storming is expected to begin within the next few hours with a maximum projected level of G2 (Moderate) storms for September 12th. A G3 (Strong) Geomagnetic Storm Watch is still in effect for September 13th due to the combined influence of this CME and the one projected to arrive late on the 12th. G1 (Minor) storming is likely to continue into September 14th. In addition, the S1 (Minor) solar radiation storm that is in progress as a result of the eruption on September 10th is expected to persist for the next few days with a possible slight increase with the arrival of the CMEs. Keep in mind that the forecast periods listed are in Universal Time so aurora watchers in the northern U.S. should be looking for possible activity tonight through Saturday night.

While there has been a lot of fear-mongering about these two CMEs, I expect that the only consequences we will see from both, the biggest to hit the Earth during this solar maximum, will be the possibility that the northern lights might be visible in places farther south than normal.

Earth under fire from the Sun!

Earth under fire from the Sun!

The Sun’s sunspot production might be down, but we are still in the solar maximum, weak as it is, and this last week the Sun has been producing the strongest flares in years. The sunspot producing these flares is now rotating into a position where any further flares will be aimed at the Earth. Should be interesting.

The Sun has emitted a big flare, and a coronal mass ejection from this is expected to hit the Earth on Saturday.

Chicken Little report: The Sun has emitted a big flare, and a coronal mass ejection from this is expected to hit the Earth on Saturday.

There will be some gnashing of teeth about this flare, but in truth, this sentence says it all:

The radiation storm, in progress, ranks “S1” on NOAA space weather scales, which means it poses no serious threat to satellites or astronauts.

The sun yesterday emitted the second biggest flare since 2006, with two coronal mass ejections heading for the Earth

The sun yesterday emitted its second biggest flare since 2006, with two coronal mass ejections heading for the Earth.

None of this will kill us, so stay calm. It is, however, a wonderful opportunity for solar scientists to study an active sun, something that might become rare in the coming decades.

The biggest solar storm to be aimed at the Earth in seven years is expected to reach us by Tuesday.

The biggest coronal mass ejection to be aimed at the Earth in seven years is expected to reach us by Tuesday.

No need to panic. Not only is the storm still relatively mild compared to past eruptions, the airline and electrical industries are actually well prepared for this event. However, if you want to see the aurora, this will probably be a good opportunity.

Stand by for space weather

Stand by for space weather: three coronal mass ejections were released by the sun in the past few days and are aimed directly at the earth. The first hit tonight, without doing much damage.

Though it is important to prepare for these solar storms, don’t expect them to do much harm. Power companies use the warnings to protect their grids. What you can expect is an increased chance of seeing the aurora at lower latitudes.

Sunspots and the danger of crying wolf

It’s that time of year again, buckos. Every June, like clockwork, stories and op-eds like these start to flood the media:

Not surprisingly, these stories always happen about the same time our federal bureaucracy puts together a one day June propaganda event called the Space Weather Enterprise Forum, designed to sell to journalists the idea that we are all gonna die if we don’t spend gazillions of dollars building satellites for tracking the sun’s behavior. Along with this conference come numerous press releases, written by the conference’s backers. Here for example is a quote from a press release emailed to me and many journalists:

Recent activity on the Sun, captured in stunning imagery from the Solar Dynamics Observatory, and the resulting threat of significant radiation storms and radio blackouts here on Earth are vivid reminders of our need to better understand the science, improve our forecasts and warnings, and better prepare ourselves for severe space weather storms as the next solar maximum approaches.

The problem for these fear-mongers, however, is that shortly before their forum the scientists who actually study the sun held another press conference, where they laid out in exquisite detail the sun’s astonishing recent decline in activity, and how the next solar maximum will likely be the weakest in centuries and might very well be the last maximum we will see for decades to come.

In other words, the annual effort by government bureaucrats to drum up funding for more space weather facilities has collided head on with the facts.

That there are science journalists from so many major news organization so easily conned into buying this fear-mongering is pitiful enough. More significant, however, is the fact that this annual effort at crying wolf has not been very successful. For years Congress has not funded any new space weather satellites, and doesn’t appear ready to do so in the future, especially with the present budget crisis.
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