At around 4:53 pm on the 20th, there was an earthquake with its epicenter off the coast of Sanriku. The maximum seismic intensity is 5+, and the magnitude (M) indicating the scale of the earthquake is the same as when it was first observed.From 7.4Fixed to 7.5. The depth of the epicenter was approximately 10 km. The Japan Meteorological Agency has issued a tsunami warning for the central Pacific coast of Hokkaido and Iwate Prefecture. A tsunami advisory has been issued for the eastern and western Pacific coasts of Hokkaido, the Pacific coast of Aomori prefecture, Miyagi prefecture, and Fukushima prefecture, calling for caution.
In Chiba Prefecture, a magnitude 3 earthquake was observed in Matsudo City and Urayasu City. A tsunami forecast has been issued that predicts slight sea level changes in Kujukuri and Sotobo, Chiba Prefecture.
The total population of the area affected by the earthquake (seismic intensity 1 or higher) is approximately 66,531,000. Of this population, 28.1%, or approximately 18.684 million people, are aged 65 and over, who are considered to be at high risk of damage from earthquakes.
The seismic intensity in various parts of Chiba Prefecture is as follows.
▼Seismic intensity 3
Matsudo City, Urayasu City
▼Seismic intensity 2
Chuo Ward, Chiba City, Hanamigawa Ward, Chiba City, Inage Ward, Chiba City, Wakaba Ward, Chiba City, Midori Ward, Chiba City, Mihama Ward, Chiba City, Ichikawa City, Funabashi City, Noda City, Narita City, Sakura City, Narashino City, Kashiwa City, Ichihara City, Nagareyama City, Yachiyo City, Abiko City, Kamagaya City, Yotsukaido City, Yachimata City, Inzai City, Shirai City, Tomisato City, Shisui Town, Sakae Town, Choshi City , Mobara City, Togane City, Asahi City, Sosa City, Katori City, Sammu City, Oami Shirasato City, Kanzaki Town, Tako Town, Tosho Town, Kujukuri Town, Shibayama Town, Yokoshiba Hikari Town, Ichinomiya Town, Mutsumi Sawa Town, Chosei Village, Shirako Town, Nagara Town, Chonan Town, Tateyama City, Kisarazu City, Kamogawa City, Kimitsu City, Futtsu City, Sodegaura City, Minamiboso City, Isumi City, Otaki Town, Kyonan Town
▼Seismic intensity 1
Katsuura City
The earthquake intensity in various parts of the country is as follows.
▼Seismic intensity 5+
□Aomori prefecture
Hashikami Town
▼Seismic intensity 5 lower
□Aomori prefecture
Hachinohe City, Shichinohe Town, Tohoku Town, Oirase Town, Gonohe Town, Nanbu Town
□Iwate Prefecture
Miyako City, Fudai Village, Morioka City, Ninohe City, Hachimantai City, Yahaba Town, Hanamaki City
□Miyagi Prefecture
Tome City, Wakuya Town
▼Seismic intensity 4
□Hokkaido
Hakodate City, Niikappu Town
□Aomori prefecture
Towada City, Misawa City, Noheji Town, Rokunohe Town, Yokohama Town, Rokkasho Village, Sannohe Town, Tago Town, Shingo Village, Aomori City, Tsugaru City, Hiranai Town, Sotogahama Town, Fujisaki Town, Mutsu City, Higashitori Village
□Iwate Prefecture
Kuji City, Yamada Town, Iwaizumi Town, Tanohata Village, Noda Village, Hirono Town, Takizawa City, Shizukuishi Town, Kuzumaki Town, Iwate Town, Shiwa Town, Karumai Town, Kunohe Village, Ichinohe Town, Kitakami City, Tono City, Ichinoseki City, Oshu City, Nishiwaga Town, Kanegasaki Town, Hiraizumi Town, Ofunato City, Kamaishi City, Sumita Town, Otsuchi Town
□Miyagi Prefecture
Kesennuma City, Kurihara City, Osaki City, Ikama Town, Misato Town, Natori City, Kakuda City, Iwanuma City, Zao Town, Ogawara Town, Kawasaki Town, Marumori Town, Watari Town, Yamamoto Town, Miyagino Ward, Sendai City, Ishinomaki City, Higashi Matsushima City, Matsushima Town
□Akita prefecture
Mitane Town, Igawa Town, Akita City, Yurihonjo City, Nikaho City, Odate City, Kazuno City, Kitaakita City, Yokote City, Daisen City, Misato Town
□Yamagata Prefecture
Sakata City, Mikawa Town, Murayama City, Nakayama Town
□Fukushima Prefecture
Kunimi Town
▼Seismic intensity 3
□Hokkaido
Hokuto City, Nanae Town, Shinhidaka Town, Shinshinotsu Village, Kita Ward, Sapporo City, Higashi Ward, Sapporo City, Kiyota Ward, Sapporo City, Ebetsu City, Chitose City, Eniwa City, Kitahiroshima City, Shiranai Town, Kikonai Town, Kaminokuni Town, Assabu Town, Minamipporo Town, Naganuma Town, Sobetsu Town, Muroran City, Tomakomai City, Shiraoi Town, Atsuma Town, Mukawa Town, Biratori Town, Urakawa Town, Samani Town, Obihiro City, Memuro Town, Urahoro Town, Taiki Town, Kushiro City
□Aomori prefecture
Goshogawara City, Imabetsu Town, Yomoda Village, Itayagi Town, Tsuruta Town, Nakadomari Town, Hirosaki City, Kuroishi City, Hirakawa City, Ajigasawa Town, Inakadate Village, Oma Town, Sai Village
□Iwate Prefecture
Rikuzentakata City
□Miyagi Prefecture
Kami Town, Minamisanriku Town, Shiroishi City, Murata Town, Aoba Ward, Sendai City, Wakabayashi Ward, Sendai City, Taihaku Ward, Sendai City, Izumi Ward, Sendai City, Shiogama City, Tomiya City, Shichigahama Town, Rifu Town, Yamato Town, Osato Town, Ohira Village
□Akita prefecture
Noshiro City, Oga City, Katakami City, Fujisato Town, Hachimine Town, Gojome Town, Hachirogata Town, Ogata Village, Kosaka Town, Kamikoani Village, Yuzawa City, Semboku City, Ugo Town, Higashinaruse Village
□Yamagata Prefecture
Tsuruoka City, Shonai Town, Yuza Town, Yamagata City, Sagae City, Kaminoyama City, Tendo City, Higashine City, Obanazawa City, Yamabe Town, Kahoku Town, Nishikawa Town, Asahi Town, Oe Town , Oishida Town, Shinjo City, Mogami Town, Funagata Town, Mamurogawa Town, Okura Village, Sakekawa Village, Yonezawa City, Nanyo City, Takahata Town, Kawanishi Town, Oguni Town, Shirataka Town, Iide Town
□Fukushima prefecture
Fukushima City, Koriyama City, Shirakawa City, Sukagawa City, Date City, Kuwaori Town, Otama Village, Kagamiishi Town, Tenei Village, Saigo Village, Izumizaki Village, Nakajima Village, Yabuki Town, Iwaki City, Soma City, Minamisoma City, Futaba Town, Namie Town, Shinchi Town, Inawashiro Town, Aizuzakashita Town, Aizumisato Town
□Ibaraki Prefecture
Hitachiota City, Kasama City, Ibaraki Town, Tsuchiura City, Ishioka City, Joso City, Toride City, Tsukuba City, Tsukubamirai City
□Tochigi Prefecture
Takanezawa Town
□Gunma prefecture
Tatebayashi City, Meiwa Town, Oura Town
□Saitama Prefecture
Kazo City, Kuki City, Kawaguchi City, Kasukabe City, Satte City, Miyashiro Town
□Tokyo
Hachioji City
□Kanagawa Prefecture
Nishi Ward, Yokohama City, Naka Ward, Yokohama City, Odawara City
□Niigata prefecture
Nagaoka City, Kamo City, Mitsuke City, Tagami Town, Kariwa Village, Kita Ward, Niigata City, Higashi Ward, Niigata City, Chuo Ward, Niigata City, Minami Ward, Niigata City, Nishi Ward, Niigata City, Nishikan Ward, Shibata City, Murakami City, Gosen City, Agano City, Tainai City, Seiko Town, Aga Town
□Yamanashi Prefecture
Oshino village
▼Seismic intensity 2
□Hokkaido
Shikabe Town, Mori Town, Ishikari City, Tobetsu Town, Chuo Ward, Sapporo City, Shiroishi Ward, Sapporo City, Toyohira Ward, Sapporo City, Minami Ward, Sapporo City, Nishi Ward, Sapporo City, Atsushi, Sapporo City Betsu Ward, Teine Ward, Sapporo City, Matsumae Town, Fukushima Town, Esashi Town, Otobe Town, Imakane Town, Setana Town, Yubari City, Iwamizawa City, Bibai City, Mikasa City, Yu Jin Town, Kuriyama Town, Tsukigata Town, Date City, Toyoura Town, Toyako Town, Noboribetsu City, Abira Town, Hidaka Town, Erimo Town, Otofuke Town, Shihoro Town, Shimizu Town, Makubetsu Town, Ikeda Town, Toyokoro Town, Honbetsu Town, Nakasatsunai Village, Sarabetsu Village, Hiroo Town, Kushiro Town, Akkeshi Town, Hamanaka Town, Shibecha Town, Tsurui Village, Shiranuka Town, Yakumo Town, Oshamanbe Town, Otaru City, Yoichi Town, Akaigawa Village, Niseko Town, Makkari Village, Rusutsu Village, Kutchan Town, Kuromatsunai Town, Okushiri Town, Fukagawa City, Imoseushi Town, Chichibubetsu Town, Hokuryu Town, Numata Town, Ashibetsu City, Takigawa City, Sunagawa City, Naie Town, Urasu Town, Shintotsukawa Town, Uryu Town, Kenbuchi Towns, Asahikawa City, Toma Town, Biei Town, Furano City, Nakafurano Town, Minamifurano Town, Shimukappu Village, Mashike Town, Bihoro Town, Kiyosato Town, Ozora Town, Kitami City, Kunikofu Town, Yubetsu Town, Kamishihoro Town, Shikaoi Town, Shintoku Town, Ashoro Town, Teshikaga Town, Nakashibetsu Town, Shibetsu Town, Rausu Town, Betsukai Town, Nemuro City
□Aomori prefecture
Fukaura Town, Nishimeya Village, Owani Town, Kazamaura Village
□Miyagi Prefecture
Shichikashuku Town, Shibata Town, Tagajo City, Onagawa Town
□Yamagata Prefecture
Kanayama Town, Tozawa Village, Nagai City
□Fukushima prefecture
Nihonmatsu City, Tamura City, Motomiya City, Kawamata Town, Tanagura Town, Yamatsuri Town, Hanawa Town, Ishikawa Town, Tamagawa Village, Hirata Village, Asakawa Town, Furudono Town, Ono Town, Hirono Town, Naraha Towns, Tomioka Town, Kawauchi Village, Okuma Town, Katsurao Village, Iitate Village, Aizuwakamatsu City, Kitakata City, Minamiaizu Town, Kitashiobara Village, Nishiaizu Town, Bandai Town, Yukawa Village, Yanaizu Town
□Ibaraki Prefecture
Mito City, Hitachi City, Takahagi City, Kitaibaraki City, Hitachinaka City, Hitachiomiya City, Naka City, Omitama City, Shirosato Town, Tokai Village, Daigo Town, Koga City, Yuki City, Ryugasaki City, Shimotsuma City, Ushiku City, Shika Shima City, Itako City, Moriya City, Chikusei City, Bando City, Inashiki City, Kasumigaura City, Sakuragawa City, Kamisu City, Namegata City, Hokota City, Miho Village, Ami Town, Kawachi Town, Yachiyo Town, Goka Town, Sakai Town, Tone Town
□Tochigi Prefecture
Utsunomiya City, Tochigi City, Sano City, Kanuma City, Oyama City, Moka City, Sakura City, Nasukarasuyama City, Shimotsuke City, Kamimikawa Town, Mashiko Town, Motegi Town, Ichigai Town, Haga Town, Mibu Town, Nogi Town, Nakagawa Town, Otawara City, Yaita City, Nasushiobara City, Shioya Town, Nasu Town
□Gunma prefecture
Maebashi City, Takasaki City, Isesaki City, Ota City, Shibukawa City, Annaka City, Tamamura Town, Itakura Town, Chiyoda Town, Oizumi Town, Numata City
□Saitama Prefecture
Kumagaya City, Gyoda City, Honjo City, Higashimatsuyama City, Hanyu City, Konosu City, Fukaya City, Yoshimi Town, Hatoyama Town, Misato Town, Kamikawa Town, Kamisato Town, Nishi Ward, Saitama City, Kita Ward, Saitama City, Omiya Ward, Saitama City, Minuma Ward, Saitama City, Chuo Ward, Saitama City, Sakura Ward, Saitama City Urawa Ward, Saitama City Minami Ward, Midori Ward, Saitama City , Kawagoe City, Tokorozawa City, Sayama City, Ageo City, Soka City, Koshigaya City, Warabi City, Toda City, Iruma City, Asaka City, Shiki City, Wako City, Niiza City, Okegawa City, Kitamoto City, Yashio City Fujimi City, Misato City, Hasuda City, Sakado City, Tsurugashima City, Hidaka City, Yoshikawa City, Fujimino City, Ina Town, Miyoshi Town, Moroyama Town, Kawashima Town, Matsubushi Town, Chichibu City
□Tokyo
Tachikawa City, Musashino City, Mitaka City, Fuchu City, Chofu City, Machida City, Koganei City, Kodaira City, Hino City, Higashimurayama City, Kokubunji City, Kunitachi City, Komae City, Higashiyamato City, Kiyose City, Higashikurume City, Tama City, Inagi City, Nishitokyo City, Chiyoda Ward , Chuo Ward, Minato Ward, Shinjuku Ward, Bunkyo Ward, Taito Ward, Sumida Ward, Koto Ward, Shinagawa Ward, Meguro Ward, Ota Ward, Setagaya Ward, Shibuya Ward, Nakano Ward, Suginami Ward, Toshima Ward, Kita Ward, Arakawa Ward, Itabashi Ward, Nerima Ward, Adachi Ward, Katsushika Ward, Edogawa Ward
□Kanagawa Prefecture
Kanagawa Ward, Yokohama City, Kohoku Ward, Yokohama City, Asahi Ward, Yokohama City, Midori Ward, Yokohama City, Seya Ward, Yokohama City, Kawasaki Ward, Kawasaki City, Saiwai Ward, Kawasaki City, Nakahara Ward, Kawasaki City, Takatsu Ward, Kawasaki City, Tama Ward, Kawasaki City, Miyamae Ward, Kawasaki City, Asao Ward, Kawasaki City, Hiratsuka City, Kamakura City, Fujisawa City, Chiga Saki City, Miura City, Yamato City, Ebina City, Zama City, Ayase City, Samukawa Town, Ninomiya Town, Sagamihara City Midori Ward, Sagamihara City Chuo Ward, Sagamihara City Minami Ward, Hadano City, Atsugi City, Isehara City, Minamiashigara City, Nakai Town, Oim Town, Matsuda Town, Kaisei Town, Yugawara Town, Aikawa Town
□Niigata prefecture
Sanjo City, Kashiwazaki City, Ojiya City, Tokamachi City, Uonuma City, Minamiuonuma City, Izumozaki Town, Konan Ward, Niigata City, Akiba Ward, Niigata City, Tsubame City, Yahiko Village, Sekikawa Village, Awashimaura Village, Itoigawa City, Myoko City, Joetsu City, Sado City
□Ishikawa Prefecture
Suzu City, Hakui City, Houdatsushimizu Town
□Yamanashi Prefecture
Fujiyoshida City, Yamanakako Village, Narusawa Village, Fujikawaguchiko Town, Kofu City, Nirasaki City, Minami Alps City, Hokuto City, Kai City, Fuefuki City, Koshu City, Chuo City, Ichikawa Misato Town, Minobu Town, Fujikawa Town, Showa Town
□Nagano Prefecture
Nagano City, Iiyama City, Shinanomachi, Iizuna Town, Suwa City, Saku City, Minamimaki Village, Karuizawa Town, Miyota Town
□Shizuoka prefecture
Izu City, Numazu City, Mishima City, Fujinomiya City, Fuji City, Gotemba City, Shimizu Town, Oyama Town, Shimizu Ward, Shizuoka City
□Aichi prefecture
Tobishima Village
▼Seismic intensity 1
□Hokkaido
Kimobetsu Town, Kyogoku Town, Shimamaki Village, Sutsu Town, Rankoshi Town, Iwanai Town, Wassamu Town, Kamifurano Town, Rumoi City, Abashiri City, Tsubetsu Town, Shari Town, Okito Town, Saroma Town, Engaru Town, Okopbe Town, Rikubetsu Town, Haboro Town, Hatsuyamabetsu Village, Sarufutsu Village
□Fukushima Prefecture
Shimogo Town, Kanayama Town
□Ibaraki Prefecture
Oarai Town
□Tochigi Prefecture
Ashikaga City, Nikko City
□Gunma prefecture
Kiryu City, Tomioka City, Midori City, Shinto Village, Yoshioka Town, Kanra Town, Nakanojo Town, Tsumagoi Village, Takayama Village, Higashiazuma Town
□Saitama Prefecture
Namegawa Town, Arashiyama Town, Ogawa Town, Tokigawa Town, Hanno City, Ogose Town, Yokose Town, Ogano Town
□Tokyo
Akishima City, Fussa City, Musashimurayama City, Hamura City, Ome City, Akiruno City, Oshima Town
□Kanagawa Prefecture
Yokosuka City, Yamakita Town, Manazuru Town
□Niigata prefecture
Tsunan Town
□Toyama Prefecture
Toyama City, Uozu City, Namekawa City, Funahashi Village, Nyuzen Town, Asahi Town, Takaoka City, Himi City, Imizu City
□Ishikawa Prefecture
Wajima City, Tsubata Town
□Yamanashi Prefecture
Tsuru City, Otsuki City, Uenohara City, Doshi Village, Nishikatsura Town, Kosuge Village, Yamanashi City, Hayakawa Town, Nanbu Town
□Nagano Prefecture
Nakano City, Omachi City, Chikuma City, Matsukawa Village, Hakuba Village, Sakaki Town, Obuse Town, Kijimadaira Village, Nozawa Onsen Village, Sakae Village, Matsumoto City, Ueda City, Okaya City, Komoro City, Chino City, Shiojiri City, Higashi Oichi, Azumino City, Tateshina Town, Shimosuwa Town, Fujimi Town, Hara Village, Iida City, Tatsuno Town, Minowa Town, Iijima Town, Minamiminowa Village, Miyata Village, Matsukawa Town, Takamori Town, Anan Town, Shimojo Village, Kiso Town
□Gifu Prefecture
Nakatsugawa City, Gifu City, Hashima City, Kaizu City, Wanouchi Town, Anpachi Town, Ono Town
□Shizuoka prefecture
Ito City, Shimoda City, Izunokuni City, Higashiizumachi, Matsuzaki Town, Nishiizu Town, Kannami Town, Susono City, Nagaizumi Town, Aoi Ward, Shizuoka City, Suruga Ward, Shizuoka City, Shimada City, Yaizu City, Fujieda City, Makinohara City, Yoshida Town, Iwata City, Kakegawa City, Fukuroi City, Kosai City, Omaezaki City, Kikugawa City
□Aichi prefecture
Chikusa Ward, Nagoya City, Higashi Ward, Nagoya City, Kita Ward, Nagoya City, Nakamura Ward, Nagoya City, Showa Ward, Nagoya City, Mizuho Ward, Nagoya City, Atsuta Ward, Nagoya City, Nakagawa Ward, Nagoya City, Minato Ward, Nagoya City, Minami Ward, Nagoya City, Ichinomiya City, Kasugai Tsushima City, Kariya City, Anjo City, Tokoname City, Inazawa City, Tokai City, Obu City, Chiryu City, Owariasahi City, Takahama City, Aisai City, Kiyosu City, Yatomi City, Miyoshi City, Ama City, Togo Town, Oji Town, Kanie Town, Higashiura Town, Taketoyo Town
□Mie Prefecture
Kuwana City, Suzuka City, Kisosaki Town, Asahi Town, Kawagoe Town
□Shiga prefecture
Omihachiman City
[National population of areas affected by the earthquake]
66,531,436 people (18,684,964 people aged 65 and over, 28.1%)
*What is “population of the area affected by the earthquake”?
Total population of cities, wards, towns and villages where earthquakes with an intensity of 1 or higher were observed (compiled by Chiba Nippo based on national statistics as of January 2025 to measure how many people were likely to feel the earthquake). In addition, the population aged 65 and over, who are considered to be at high risk of damage from earthquakes, is also calculated separately. This information is provided as reference information to help improve daily disaster prevention awareness.
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