national

M6.5 quake hits eastern Japan; no tsunami risk

38 Comments

A strong 6.5 magnitude earthquake hit eastern Japan on Wednesday, the U.S. Geological Survey said, but local authorities said there was no risk of a tsunami.

The quake, measured at 6.9 by Japanese seismologists, was centered on a spot more than 600 kilometers south of Tokyo, the USGS said.

The quake struck at 9:18 a.m. at a depth of 404 kilometers, the USGS said. It was felt in Miyagi, Fukushima, Tochigi, Ibaraki, Saitama, Chiba and Kanagawa prefectures, as well as in Tokyo where it registered a 3.

A spokesman for the Japan Meteorological Agency said there was no risk of a tsunami.

Fukushima nuclear plant operator TEPCO reported there were no new problems at the stricken nuclear plant.

"We have confirmed that there was no immediate abnormality," according to data collected by monitoring equipment, a TEPCO spokesman said, adding that crews will patrol the crippled plant's vast campus to survey whether any physical damage has been caused.

© (C) 2013 AFP

©2019 GPlusMedia Inc.

38 Comments
Login to comment

season start for earth quake Hope every one save

-8 ( +2 / -10 )

Was riding a bike in west Tokyo.

Didn't feel a thing.

2 ( +4 / -2 )

only an M3 in Tokyo? Are you sure? It felt much bigger than an M3...maybe shindo 3?

7 ( +7 / -0 )

It's sometimes difficult to comprehend the forces involved when an earthquake 400 km underground can shake so much of the earth's crust. Anyway, apart from scaring my dog, no harm done.

4 ( +4 / -0 )

It was a bit long too :(

4 ( +4 / -0 )

The weirdest thing was how quiet it was - no rumble.

1 ( +1 / -0 )

It felt more like a 3.9 in the Tokyo area and it lasted a long time.

-1 ( +1 / -2 )

It was a Shindo 3 in the 23 wards.

0 ( +0 / -0 )

They're reporting this as a 6.9 in the U.S. press. It looks like the center was way south of Tokyo.

1 ( +5 / -4 )

Most Japanese don't think in terms of magnitude, they think in terms of the shindo. number (not the energy released but the degree of shaking).

0 ( +1 / -1 )

Fukushima nuclear plant operator TEPCO reported there were no new problems at the stricken nuclear plant.

"We have confirmed that there was no immediate abnormality,"

You mean in addition to the myriad of abnormalities you have going on right now?

3 ( +4 / -1 )

Everyone felt it here in Iwate, but the Japan Meteorological Agency site has been knocked out since it happened so I still have no idea as to the extent of the event 2 hours later.

0 ( +0 / -0 )

Two "Bads" over a simple post? Sheesh!

US Geological Survey: 6.5

US Press, quoting NHK, 6.9

http://www.reuters.com/article/2013/09/04/us-japan-quake-idUSBRE98301B20130904?feedType=RSS&feedName=worldNews

1 ( +3 / -2 )

It woke me up. Thanks earthquake, didn't wanted to sleep long anyway.

0 ( +1 / -1 )

Sure felt the rumble here..

0 ( +0 / -0 )

We had a 6.0 earthquake too on the other side of the Pacific ..........the God's are a bit angry it seems. http://www.cbc.ca/news/canada/british-columbia/story/2013/09/03/bc-earthquake-pacific-tsunami.html

2 ( +2 / -0 )

but the Japan Meteorological Agency site has been knocked out since it happened

It's back up again, but a little slow. Probably lots of folks checking in.

1 ( +2 / -1 )

AFP/JT is mixing apples and oranges.

"6.5 magnitude" is how powerful it was in terms of energy released.

"Tokyo where it registered a 3" indicates seismic intensity (how much shaking at a specific point) on the Japanese "shindo" scale.

Magnitude does not change depending on location. A 6.5 magnitude quake is a 6.5 magnitude quake. Period.

Unfortunately, whoever compiled/edited this for AFP doesn't know his earthquakes. I am no expert, but I certainly know the difference between magnitude and shindo.

2 ( +7 / -5 )

We (here in Tokyo especially) were very lucky that it was so deep. If it had been shallow, it would have been bad.

-1 ( +2 / -3 )

Magnitude does not change depending on location. A 6.5 magnitude quake is a 6.5 magnitude quake. Period.

Nevertheless, the measurements of the USGS and the JMA are often different when quakes are reported. Sometimes, one group or the other adjusts it later. Deal with it.

-1 ( +3 / -4 )

So, where are these experts that claim they can predict these quakes and the active fault lines? Didn't hear any phone alarms going off. Go ahead! Turn all reactors back on. It's ok!

0 ( +2 / -2 )

Nevertheless, the measurements of the USGS and the JMA are often different when quakes are reported. Sometimes, one group or the other adjusts it later. Deal with it.

I think you misunderstood me. I was speaking of the 6.5 (or 6.9) and 3 difference. I have no problems "dealing with" USGS and JMA difference. I was merely pointing out that the article gave no definition for the "3". The "3" is NOT magnitude.

Please re-read my comment, and you will see that made no reference at all to the USGS and JMA difference.

1 ( +4 / -3 )

Graham,

Sorry, I now see what you were referring to.

2 ( +4 / -2 )

Currently working in Kanagawa Prefecture, no one notice or felt a thing till it was annouced on the intercom system. So much for alerting the public beforehand, huh!?

-1 ( +0 / -1 )

Knowitall,

Yes, sorry. I see what you meant. Actually, my apology above was meant for you... My brain's not working.

2 ( +4 / -2 )

This one was really gentle...

0 ( +0 / -0 )

I was at work and did not feel a thing. @Kawasaki

0 ( +0 / -0 )

I hate to be the voice of impending doom here, but there has been a flurry of activity down the south of Japan recently. Alot of smaller ones around Southern Wakayama too, which are not making news. And a bigger one in Kansai a couple of months ago too.

I would not be surprised if the very long awaited Tokai Earthquake is on its way soon.

0 ( +1 / -1 )

I would not be surprised if the very long awaited Tokai Earthquake is on its way soon.

Having these small to moderate earthquakes periodically is a good thing. It releases built up pressure making it less likely of having a bigger quake. Its when you don't have an earthquake for a very long time in an quake-prone area like Japan, is when you should really be worried.

-1 ( +1 / -2 )

I thought it was more like 3.14159265359.

4 ( +4 / -0 )

A lot of smaller ones around Southern Wakayama too

http://bousai.tenki.jp/bousai/earthquake/seismicity_map/?area_type=japan_detail&recent_type=7days

I can see only 2 earthquakes near Wakayama in the last 7 days. The earthquake activities are concentrated in Tohoku area lately.

-1 ( +0 / -1 )

Didn't feel a thing here in Shibuya.....

0 ( +0 / -0 )

Inside an elevator. Shook a little - not too bad but still, I'd rather not experience that again.

0 ( +1 / -1 )

Jeez, a magnitude 6.9 is now considered 'moderate'?! http://online.wsj.com/article/BT-CO-20130903-712122.html What is considered a 'strong' earthquake nowadays?

0 ( +0 / -0 )

there were no reports of damage in this article so I do pray that no one was seriously injured

0 ( +0 / -0 )

What is considered a 'strong' earthquake nowadays?

What is your basis of comparison? 30 years ago, and M5 earthquake was considered strong, but buildings weren't as earthquake proof back then. The Hanshin earthquake changed building standards so they can tolerate M7 earthquakes. Now something like a 6.9 is considered moderate and anything bigger than 7 - 7.5 is considered major.

0 ( +0 / -0 )

Sorry, in my part of Tokyo, the western part, I felt NOTHING! My Yurekuru, Iphone application that is supposed to warn me about a quake?? Nothing! I have looked up the history on the quakes and it is not even there, but the only way I found out was that I talked to a friend, I guess he was sitting and started to say TEMBLOR, TEMBLOR, Spanish for earthquake but he was another part of Tokyo, anyway I do hope no big quakes come to Fukushima etc..

0 ( +0 / -0 )

The phone app only goes off for anything Shindo 4 or over, it's only 4 or over where you get damage. As it was a 3 in Tokyo your phone was not supposed to go off. I think you can elect to be warned of quakes under 4, but it's a choice..the default is 4 or over.

0 ( +0 / -0 )

Login to leave a comment

Facebook users

Use your Facebook account to login or register with JapanToday. By doing so, you will also receive an email inviting you to receive our news alerts.

Facebook Connect

Login with your JapanToday account

User registration

Articles, Offers & Useful Resources

A mix of what's trending on our other sites