So, there was a place I went to before Nakai-kun's celebration party!
In fact, the day before, an avalanche occurred in a place in Nishikurosawa, Tenjin.
Fortunately, everyone was safe.
The scale is a size XNUMX surface avalanche.
How much snow binding force causes an avalanche
You can't tell unless you actually look at the place where the snow fell.
But it's dangerous to go alone, so I thought it was impossible and gave up.
In the photo, a beautiful layer was taken by the compression test at the place of the layer where the snow fell.
The next day, Hayato will go with me, so
I went to the same slope as the place where the snow fell, and chose a safe place for the pit check.
The result is CTM17SP @ down48DF2.0
(Compression test, 7th elbow tap in Suddun Planar in a XNUMX cm snowy area
Snowflakes are 2 mm thick snow)
The slope here was a north slope, but the slope was 43 degrees, and it was a place where a cornice was made by top loading on the top.
It was 1 cm one day before the avalanche, 10 cm snow two days ago, and it was sunny three days ago.
I was convinced that the snow had fallen from 48 cm.
What surprised me in the pit check was that the way the broken layer cracked was called Suddun Planar.
It is that each layer came out beautifully in front.
Until now, when I was doing it, I was able to see the SP for the first time because it was called Break and the way the layers were broken was only bumpy.
SP is the most dangerous of the five fracture shapes.
And another thing that surprised me was that the weak layers were mostly hard layers such as crusts.
When I actually examined the snowflakes in the weak layer, it was not so hard,
It was a spherical shape with snowflakes called Komariyuki remaining.
Immediately when I told Nori-san, a JAN instructor, about that,
I was told that even fresh snow with large crystals and heavy snow can cause induction.
I was able to learn a lot because I was able to actually experience the pit check at the place where the snow fell.
