The Letter Series and the Golden Years of IH. The F-series tractors lasted until 1939. In late 1939, the famous Letter series of Farmall tractors was introduced. The model name letters were A, B, BN, C (which replaced the B and BN in 1948), H, M, and MD(M diesel).
Japan has had a long history of earthquakes and seismic activity. It is an area of high seismicity because it is located near major tectonic plate boundaries and is situated on the Pacific Ring of Fire.n July 16, 2007, an earthquake measuring 6.6 M, the 2007 ChÅ«etsu offshore earthquake hit about 29 kilometres (18 mi) west of Niigata in the northwest Niigata region of Japan. ) was a powerful magnitude 6.6 earthquake The earthquake shook Niigata and neighbouring prefectures.
Itâs an ominous consequence of last yearâs game-changing magnitude 9.0 earthquake, the most powerful recorded to hit Japan. The government agency studying seismic activity has long said the odds of a mag-7-plus quake hitting Tokyo were 70% over 30 years.y the afternoon, Japanâs major dailies had published the news prominently on their websites. The last big quake to hit Tokyo was the Great Kanto earthquake, a magnitude-7.9 jolt that struck on Sept. 1, 1923.