Big Lake, Alaska and The Susitna Valley News, Weather, Events, And More

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Thursday, June 22 2017 @ 08:23 AM AKDT

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Happy Summer Solstice!

ScienceThe Summer Solstice, which is also the First Day of Summer, is 8:24 pm Alaska Time today.

The timing of the solstice is not based on a specific calendar date and time. It depends on when the Sun reaches its northernmost point from the equator.

The word solstice is from the Latin solstitium, from sol (sun) and stitium (to stop), reflecting the fact that the Sun appears to stop at this time (and again at the winter solstice). In temperate regions, we notice that the Sun is higher in the sky throughout the day, and its rays strike Earth at a more direct angle, causing the efficient warming we call summer.

This summer solstice is the day with the most hours of sunlight during the whole year.

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Earthquake shakes Southcentral

ScienceAn earthquake of magnitude 5.4 shook Southcentral Alaska at 6:18pm. The epicenter was 16 miles NW of Nikiski. Depth was 43 miles.

Source: Alaska Earthquake Center

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Earthquake rattles Susitna Valley

ScienceAn earthquake of magnitude 4.3 rattled the Susitna Valley at 7:29 pm. The epicenter was 25 mi E of Talkeetna, at a depth of 22 miles. No reports of injury or damage have been reported.

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Quake Rattles Susitna Valley

ScienceA Magnitude 4.6 earthquake shook Southcentral on January 26, 2017 at 5:26:13 am. There have been no reports of injury or damage. The epicenter was 76 miles west of Talkeetna, at a depth of 86.9 miles.

Source: Alaska Earthquake Center

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Happy Winter Solstice!

Science

The Winter Solstice happens every year around December 21 or 22. It marks the shortest day of the year as the Northern Hemisphere is angled the farthest away from the Sun on this day. We also start to gain daylight.

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Quake Rattles Susitna Valley

ScienceA magnitude 4.4 quake struck west of Big Lake at 4:27 am. There have been no reports of injury or damage.

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Quake Rattles Valley

ScienceA 4.2 Magnitude earthquake occurred at 4:25 pm today. There have been no reports of injuries or damages.

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Magnitude 4.2 Earthquake Shakes Susitna Valley

ScienceA Magnitude 4.2 Earthquake Shakes Susitna Valley



April 7, 2016 19:24:17 AKDT
61.4177°N 149.9554°W Depth 15.1 miles
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Magnitude 4.9 quake shakes Southcentral

ScienceA Magnitude 4.9 quake shook Southcentral this afternoon. Depth 61.5 miles. There were no immediate reports of injuries or damage.

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6.79 Quake Shakes Southcentral

ScienceAn earthquake with a magnitude of 6.79 struck Southcentral Alaska at 1:30 am on Sunday. There were no immediate reports of injuries. [Note: Revised magnitude is 7.1]

AEIC

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Quake shakes Susitna Valley

ScienceA magnitude 4.81 earthquake occurred at 7:05 pm Sunday. There have been no reports of damage or injury.


AEIC
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New Digital Map of Alaska released

ScienceThis map and associated digital databases are the result of compilation and interpretation of published and unpublished 1:250,000-scale and limited 1:500,000- to 1:63,360-scale maps. Covering the entire state of Alaska, it reflects more than a century of work by a host of geologists and almost two decades of compilation work. There are two versions of the map: a detailed digital version, and a simplified, “generalized” map for print. The map units described in the accompanying pamphlet reflect those of the detailed digital map. At the end of each unit description, the generalized map unit for that unit is listed.

To download the map and related materials visit http://pubs.er.usgs.gov/publication/sim3340
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Early morning quake shakes Susitna Valley

ScienceAn early morning earthquake shook the Susitna Valley at 5:26 am. Magnitude: 4.54, 18 miles NNE of Willow, depth: 28 miles. There have been no reports of injuries.

AEIS
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New geochemical data released for the Tok and Denali Highway areas

Science(Fairbanks, AK) – The Alaska Division of Geological & Geophysical Surveys (DGGS) has published new geochemical data reports for rock samples collected in two areas of the eastern Alaska Range during summer 2015. These new datasets consist of new major- and trace-element analyses of rock samples collected to help DGGS and the public better understand the geology and mineral potential of this region of the state.

The first report includes geochemical analyses for 84 samples collected from the upper Tok River area between the Delta massive-sulfide district and the newly discovered Tetlin gold project. These data contain gold assays up to 14.5 ppm (0.423 oz/ton) with elevated As–Bi–Te content. These data will assist DGGS with its ongoing evaluation of the precious metals, lead, zinc, and copper potential of the area.

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Perplexing Pluto: New ‘Snakeskin’ Image and More from New Horizons

ScienceThe newest high-resolution images of Pluto from NASA’s New Horizons are both dazzling and mystifying, revealing a multitude of previously unseen topographic and compositional details.

One image, showing an area on Pluto’s best-mapped hemisphere near the line that separates day from night, captures a vast rippling landscape of strange, aligned linear ridges that has astonished New Horizons team members.

“It’s a unique and perplexing landscape stretching over hundreds of miles,” says William McKinnon, a New Horizons Geology, Geophysics and Imaging (GGI) team deputy lead from Washington University in St. Louis. “It looks more like tree bark or dragon scales than geology. This’ll really take time to figure out; maybe it’s some combination of internal tectonic forces and ice sublimation driven by Pluto’s faint sunlight.”

Snakeskin detail

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