text x=long y=lat text=year_label / textattrs=(color=black size=9pt) position=left; text x=long_country y=lat_country text=label_country / textattrs=(color=gray55 size=14pt) What really happens when the magnetic field flips? As the poles shift, the magnetic field weakens. The north magnetic pole seems to be controlled by two patches of magnetic field, he explains, one under northern Canada and one under Siberia. Here's what that means. The World Magnetic Model update was officially released on Monday, and magnetic north can again be precisely located for people around the world. And for the more recent years, I want to label every 10 years with blue text. And then you must account for that magnetic declination in your com… Note that this is a very new SGmap feature, and you'll need the latest release (Viya 3.5) to use it. Was there really a geologic reason Google maps sent me off course? And here's a link to the SAS code, if you'd like to see all the details. The dance of Earth's magnetic field lines presents one of the few windows scientists have to processes that happen thousands of miles below your feet. I downloaded/saved their data file (NP.xy.txt) from the browser window, and imported it into SAS with the following code: data magnetic_pole_locations; This may be a result of a jet within the core smearing and thus weakening the magnetic field under Canada, he says. (Curiously, its polar opposite, magnetic south, has moved little during this time.). ; 66.273992 -104.4765288 Canada Instead, the dynamo of Earth's core creates a magnetic field that is slightly tilted from the planet's rotational axis. 65.4826228 19.2217949 Sweden “There may well be a link there,” he says. Now, the wait for a new north is over. And then you must account for that magnetic declination in your compass readings (some compasses let you set the magnetic declination, so you don't have to add offsets manually). Where much of the state is farmland, it lies low and will be awash during and shortly after the pole shift due to flooded rivers and the sloshing of water in Lake Michigan. proc sgmap plotdata=magnetic_pole_locations noautolegend; But the difference is minor for most civilian purposes, and the changes are mainly limited to latitudes above 55 degrees. Magnetic lines of force near Earth's surface become twisted and tangled, and magnetic poles pop up in unaccustomed places. run; title1 c=gray33 h=18pt "Shift in magnetic north pole (yearly position, &minyear-&maxyear)"; series x=long_ring y=lat_ring / group=lat_ring lineattrs=(color=gray55) tip=none; Between each update, scientists check the model's accuracy against data from ground magnetic observatories and the European Space Agency's Swarm mission—a trio of magnetic-field mapping satellites that zip around Earth 15 to 16 times each day. my old boy scout compass is tracing north pole only. Unlike geomagnetic north, this position is more susceptible to the surges and flows in the swirl of liquid iron in the core. scatter x=long y=lat / markerattrs=(color=red symbol=circlefilled size=5px); data rings; We've got you covered. Scientists do not entirely understand the processes behind these shifts but they previously thought such a dramatic movement required several centuries. run; Notice that since Proc SGmap automatically zooms in/out to select a map area that 'fits' the data, plotting these rings zooms that map out a bit, and centers it on the north pole. While magnetic north has always wandered, its routine plod has shifted into high gear, sending it galloping across the Northern Hemisphere—and no one can entirely explain why. “There's no indication that there's a reversal,” Beggan says.    tip=(year lat long yearly_distance); Here's a screen-capture of what the mouse-over text looks like: It would be quite cumbersome to mouse-over each of the red markers to see all the distances, or to find the marker for a particular year. Before 1900, its wanderings likely once had a lot more wiggle and may include several hairpin turns in northern Canada that could have sent the pole on a brief southward stint. In principal, everyone who uses magnetic navigation could benefit from this update, says Arnaud Chulliat, a geomagnetist at the University of Colorado in Boulder and a NOAA affiliate who worked on the update. Even though pole shifts repeatedly relocate the North and South Poles, the last several South Pole positions have been off the coast of what we call Greater or Eastern Antarctica, leaving the Western portion of the continent outside the Antarctic Circle until the last pole shift brought the entire continent under icy conditions by centering the continent over the pole. This updated version was pre-released online in October 2018. When a pole shift occurs, it is a … Drifting Poles. Robert has worked at SAS for over a quarter century, and his specialty is customizing graphs and maps - adding those little extra touches that help them answer your questions at a glance. “It's not certain, but it could be.”. scatter x=long y=lat / markerattrs=(color=red symbol=circlefilled size=5px); scatter x=long y=lat / markerattrs=(color=red symbol=circlefilled size=5px); run; One of the great things about the new Proc SGmap is that it makes plotting lat/long data as markers on a tile map really easy, with a minimum of code. Before we start on the map, here's a bit of trivia related to magnetic north. I've read several articles that mentioned the north magnetic pole has been moving more in the past few decades, than in the previous few hundred years.    position=left tip=none; The North Magnetic Pole Is Shifting East, Fast NPR's Ari Shapiro speaks with Nature reporter Alex Witze about a rapid shift in the Earth's magnetic poles. There are many signs that the poles are indeed going to flip. But I wanted to exercise a lot of control over the labels, and (in my opinion) the easiest and most direct way to do that is by adding another text statement (or statements, in this case). When map-makers draw a map that that will be used for something important (such as navigation), they must indicate the magnetic declinationon the map, and that map is only good for a short time (because the magnetic north pole moves). But our planet's protective magnetic bubble, or magnetosphere, isn't perfectly aligned with this spin. /* Convert long from 0 to 360 values to -180 to 180 values, to use with geodist() */ data rings; set rings; Questions still likely abound: Why is magnetic north changing so fast? run; Next I want to add some lines (or circles) of latitude. The exact causes behind these reversals remains uncertain. I provide a lot of details below - but if you're not interested in the details, feel free to jump to the final map at the end! “We don't have any idea. Here's what we know.). format yearly_distance comma8.1; There's definitely not enough room to place labels on the map for each dot. The government shutdown delayed the comprehensive public release of the information, which includes online calculators, software, and a technical note describing the changes. “The average user is not going to be overly affected by this unless they happened to be trekking around the high Arctic,” Beggan says. A MAGNETIC POLE ‘SHIFT’ MAY BE CAUSING OUR RASH OF ‘SUPER STORMS’ By Cliff Harris. Astronomic or true north is the new bearing reference. But recently, that seems to have changed. 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