Volcano eruption

2 Feb

浅間山 (Mount Asama) is a 火山 (volcano) between 群馬県 (Gunma Prefecture) and 長野県 (Nagano Prefecture).

It’s about 150 kilometers (93 miles) northwest of Tokyo.


Yesterday, the 気象庁 (Japan Meteorological Agency) issued a level 3 warning* that 浅間山 (Mount Asama) could erupt within 48 hours. About 45,000 residents near the volcano were told they may need to evacuate.

* (There are five volcano warnings. Level 1 is normal / safe. Level 2 is stay away from crater. Level 3 is non-residents should stay away from the volcano. Level 4 is nearby residents need to prepare to evacuate. Level 5 is evacuation / major eruption imminent.)

Japan has many 火山 (volcanoes)…the most famous is the symbol of Japan, 富士山 (Mt. Fuji)…but most are dormant.
浅間山 (Mount Asama) is one of Japan’s most active 火山 (volcanoes).

The 気象庁 (Japan Meteorological Agency) was correct.

浅間山 (Mount Asama) had a minor eruption this morning (Monday, February 2, 2009) just before 2:00AM (JST).
No one was injured and there was no reported property damage.

The last time 浅間山 (Mount Asama) erupted was on September 1, 2004. That eruption was also fairly minor…although ash from that eruption went 200 kilometers from the volcano.
It’s biggest eruption was about 220 years ago. There were 1500 casualties and alot of property damage in that eruption.

14 Responses to “Volcano eruption”

  1. Mom September 6, 2009 at 4:56 am #

    Wow! That was so interesting to read about. and the photo is unbelievable too. have you ever visited the area upclose? I think I would rather not get too close but it is really awesome!


    • tokyo5 September 6, 2009 at 2:23 pm #

      >have you ever visited the area upclose?

      No. I have never been to this volcano.


  2. tokyo5 February 18, 2009 at 2:18 am #


    >is it expected to erupt again anytime soon?

    I don’t know how soon…but it will surely erupt again one day. It’s not dormant.

    >Kindergartners who is going to research Mount Asama

    Kindergartners do “research”??

    >Maybe I’ll take a picture of it…and send it to you.

    Yeah, I’d like to see it! (And I’m still waiting for your Obama inauguration pics.)


  3. Mb February 18, 2009 at 1:40 am #

    Big Bro,
    Wow, is it expected to erupt again anytime soon? I guess they tend to happen in strings of eruptions. This info will be great for one of my Kindergarteners who is going to research Mount Asama and depict it in a diorama! Maybe I’ll take a picture of it when it is done…along with the ones the other students make and send it to you.


  4. tokyo5 February 4, 2009 at 9:30 pm #


    Do you live near 白山(Mount Hakusan)?
    Do you live in Gifu?

    Yes, 白山 (Mt. Hakusan) has been dormant for centuries.

    And I suppose that mountain must be snowy, as you said…it’s name translates to “White Mountain”.


  5. tokyo5 February 4, 2009 at 9:27 pm #


    Thank you for the kind words.
    Please comment on my site anytime.


  6. madsilence February 4, 2009 at 1:53 pm #

    Oooh interesting! I didn’t understand the different warning levels. I’m glad that I don’t live near any active volcanos, Hakusan’s too sleepy and snowy to erupt ^^


  7. Jeffrey February 4, 2009 at 8:06 am #

    Nice write up. Enjoyed reading this post a lot.


  8. tokyo5 February 3, 2009 at 10:59 pm #


    Compared to Canada, Japan is small. But, I know what you mean…most people in the America and Canada imagine Japan to be much smaller than it is.

    Tokyo, for example, is the world’s largest metropolis.

    English people, I imagine, don’t think Japan’s small…Japan is bigger than England.


  9. tokyo5 February 3, 2009 at 10:56 pm #

    Sir Pent…

    I’m sure the U.S. military would’ve told the Americans on the base if there was a danger.

    If it got to be a “Level 4” or “Level 5”.


  10. Eric February 3, 2009 at 6:33 pm #

    I’m just waiting for the inevitable e-mail from Canada asking if I can see the volcano from my house. They all think it’s so tiny over here.


  11. Sir Pent February 3, 2009 at 12:11 pm #

    The people that RUN the base most likely knew about it…just not that people that work AT the base.


  12. tokyo5 February 2, 2009 at 10:13 pm #


    Really? The U.S. bases didn’t tell the American military about the level 3 volcano warning?

    Was there volcanic ash in Western Tokyo? There was none in metropolitan (Eastern) Tokyo)…I guess that’s because you’re closer to Gunma Prefecture out there.


  13. Brenda February 2, 2009 at 8:41 pm #

    I was so amazed by this! We’d heard nothing of the warning, but this morning my kids burst into my bedroom shouting “School’s cancelled, a volcano erupted!!!” Of course I was sure they were joking! But to my surprise, they weren’t joking at all! We had so much ash fall that school on the base was cancelled for the day! All our cars were covered in ash!


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: