Solar storm incoming: Federal agencies provide
inconsistent, confusing information
Posted at 12:31 PM ET, 07/13/2012
A wave of plasma stoked by an X-class solar
flare, the most intense type, is headed towards Earth. This blast of
charged particles, known as a coronal mass ejection (CME), is forecast to
ignite a geomagnetic storm on Earth over the weekend. NOAA predicts it will be
minor, maybe moderate. NASA says it will be moderate to severe.
I ask: which intensity will it be and
why aren’t these two science agencies on the same page?
The intensity of the inbound CME
If NOAA’s right, and the ensuing
geomagnetic storm is minor, it’s no big deal. It means the high latitudes could
be treated to some brilliant auroras over the weekend with few, if any,
negative effects on earth-orbiting satellites or the power grid.
On the other hand, if NASA’s right, and
the geomagnetic storm is strong to severe, Earth-orbiting satellites could get
disoriented and the electrical grid, according to NOAA, could
experience “widespread voltage control problems” among other issues. Aurora
could be seen as far south as Alabama and northern California.
NOAA and NASA’s predictions about the CME also differ on timing. Last night,
NOAA was forecasting a 1 a.m. Saturday arrival of the CME while NASA projected
a 6:20 a.m arrival. NOAA has since revised its
estimate to 9:00 a.m. NASA tweaked its estimate to 5:17 a.m.
The differences in these predictions
raise the question why two government agencies aren’t coordinating and issuing
one clear, consistent forecast along with estimates of the uncertainty.
Consider this scenario: A hurricane is
approaching the East Coast. What if one U.S. government agency predicted the
storm would make landfall as a category 1 to maybe category 2 storm, at worst,
while another agency forecast the storm to reach the category 2, 3 or even 4
level? Imagine the widespread confusion that would ensue. How would anyone know
if and how to prepare?
There’s a reason the National Hurricane
Center closely works with local National Weather Service offices to coordinate
hurricane and tropical storm information.
This needs to happen with NOAA and NASA
and space weather.
The differences in the geomagnetic
storm forecasts for the weekend probably reflect different roles and
responsibilities in space weather at the two agencies. NOAA is the nation’s
official source of alerts, watches and warnings about space weather and its
impacts. NASA’s primary motivation for space weather forecasting is more
specialized for “addressing the space weather needs of NASA’s robotic
Based on these different functions, it
would appear NOAA’s information should be considered the most authorative and
credible for impacts on Earth and NASA the go-to source for spacecraft. But
while NOAA may well be the “official” source of information for our planet, the
public and media take what NASA says seriously and NASA’s issuing Earth-based
Citing NASA information, the very
popular SpaceWeather.com website writes [bold text conveys my added
emphasis] “According to a forecast track prepared by analysts at the [NASA] Goddard
Space Weather Lab, the CME will hit Earth on July 14th around 10:20 UT (+/- 7
hours) and could spark strong
Contrast this with NOAA’s statement on its public
Facebook page last
night to expect [bold text conveys my added emphasis] “only minor
geomagnetic storming here when
the blast arrives likely Saturday, with few impacts noticeable to most people.”
The discrepancies between NOAA and
NASA’s information are made worse by the fact their main website updates (on SpaceWeather.gov and the NASA Goddard Space Weather Center) are seldom
accessible to the layperson.
Consider NOAA’s latest
update, replete with acronyms and technical terms that
non-specialists are likely to have trouble understanding:
The latest model run
now indicates the CME associated with yesterday’s R3 (Strong) Radio Blackout
event will impact the earth’s magnetic field around 9:00 a.m. EDT (1300 UTC) on
Saturday, July 14. SWPC is forecasting category G1 (Minor) Geomagnetic Storm
activity then, with a chance of G2 (Moderate) levels at times through July 15.
The S1 (Minor) Solar Radiation Storm persists just above event threshold.
Region 1520 has decayed in the past 12 hours, but is still potentially
Here’s an excerpt from NASA’s latest update - which is no better:
Based on preliminary
heliospheric modeling carried out at NASA GSFC Space Weather Center, it is
estimated that the CME may impact Earth, Messenger, Spitzer, MSL, Mars.
Simulations indicate that the leading edge of the CME will reach Earth at about
2012-07-14T09:17Z (plus minus 7 hours). The roughly estimated expected range of
the Kp maximum (Kp is a measure of geomagnetic disturbance levels ranging 0 -
9) is 6-8 (moderate to severe).
Why don’t these agencies prominently
publish forecasts and explanations in plain English on their main websites for
events attracting media attention?
This is a sorry state of affairs and
I’d have to give NOAA and NASA very low marks for their space weather
I fully recognize forecasting space
weather events is incredibly challenging and complex and that these two agencies have
different scientists with different sets of expertise and different tools in
But this does not absolve these Federal
agencies from working together to provide clear, consistent information.
At some point in the future -
especially with the solar cycle nearing its peak, it’s possible that a severe
geomagnetic storm could threaten Earth with serious implications for
satellite-based navigation and our power grid.
The stakes are high, and it’s
unfortunate, at the moment, we cannot rely on Federal government to provide
particularly helpful, harmonized information.
(Note: This morning, I
contacted both NOAA and NASA to comment on these issues, and have not yet
received responses except from NOAA to affirm they are the official source of
space weather forecasts. I will publish anything more substantive I hear back
from either agency.)
A wave of plasma stoked by an X-class solar flare, the most intense type, is headed towards Earth. This blast of charged particles, known as a coronal mass ejection (CME), is forecast to ignite a geomagnetic storm on Earth over the weekend. NOAA predicts it will be minor, maybe moderate. NASA says it will be moderate to severe.