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Home > Weather and Earthquakes > Tsunami Warnings/Advisories, Tsunami Information

Tsunami Information (Tsunami Observation)

Tsunami Information
This Tsunami Information was issued in the past
Occurred at 14:46 JST 11 Mar 2011
Region name Sanriku Oki
Depth about 20 km
Magnitude 9.0
Initial Tsunami Observation
Click the map to zoom in

Maximum Tsunami Observation

Tsunami Information NUMBER 64
(Tsunami Observations)

Issued at 18:05 JST 13 Mar 2011

Tsunami Observations
As of 18:00 JST
In some coastal regions, it is inferred that tsunamis higher than those recorded at observation sites have arrived.

KushiroInitial Tsunami  15:34 JST 11 Mar    (+)    2.0 m  
Maximum Tsunami  23:39 JST 11 Mar    2.1 m  
Nemuro-shi HanasakiInitial Tsunami  15:34 JST 11 Mar    (-)    Slight  
Maximum Tsunami  15:57 JST 11 Mar    2.8 m  
Nemuro-koInitial Tsunami  16:08 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  00:03 JST 12 Mar    0.7 m  
Hamanaka-cho Kiritappu-koInitial Tsunami  15:27 JST 11 Mar    (-)    Slight  
Maximum Tsunami  22:19 JST 11 Mar    2.6 m  
UrakawaInitial Tsunami  15:19 JST 11 Mar    (-)    0.2 m  
Maximum Tsunami  16:42 JST 11 Mar    2.7 m  
Tokachi-ko Initial Tsunami  15:26 JST 11 Mar    (-)    0.2 m  
Maximum Tsunami  15:57 JST 11 Mar    2.8 m or more  
Erimo-cho ShoyaInitial Tsunami  15:18 JST 11 Mar    (-)    0.1 m  
Maximum Tsunami  15:44 JST 11 Mar    3.5 m  
HakodateInitial Tsunami  16:11 JST 11 Mar    (+)    1.9 m  
Maximum Tsunami  23:35 JST 11 Mar    2.4 m  
Tomakomai-nishiko Initial Tsunami  15:37 JST 11 Mar    (-)    0.2 m  
Maximum Tsunami  17:30 JST 11 Mar    2.1 m  
Tomakomai-higashiko Initial Tsunami  15:40 JST 11 Mar    (-)    0.2 m  
Maximum Tsunami  16:17 JST 11 Mar    2.5 m or more  
Shiraoi-koInitial Tsunami  15:40 JST 11 Mar    (-)    0.1 m  
Maximum Tsunami  16:01 JST 11 Mar    1.8 m  
Oshima Mori-koInitial Tsunami  15:56 JST 11 Mar    (-)    Slight  
Maximum Tsunami  19:37 JST 11 Mar    1.8 m  
Muroran-koInitial Tsunami  15:56 JST 11 Mar    (-)    Slight  
Maximum Tsunami  20:06 JST 11 Mar    1.0 m  
WakkanaiInitial Tsunami  18:43 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  02:23 JST 12 Mar    0.4 m  
RumoiInitial Tsunami  (*3)
Maximum Tsunami  05:33 JST 12 Mar    0.3 m  
OtaruInitial Tsunami  (*3)
Maximum Tsunami  03:25 JST 12 Mar    0.3 m  
Ishikariwan-shinkoInitial Tsunami  (*3)
Maximum Tsunami  01:07 JST 12 Mar    0.4 m  
Iwanai-koInitial Tsunami  (*3)
Maximum Tsunami  02:23 JST 12 Mar    0.3 m  
AbashiriInitial Tsunami  17:02 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  02:32 JST 12 Mar    0.3 m  
Esashi-ko Initial Tsunami  17:45 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  23:36 JST 11 Mar    0.4 m  
TappiInitial Tsunami  16:09 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  16:32 JST 11 Mar    0.5 m  
HachinoheInitial Tsunami  15:22 JST 11 Mar    (-)    0.8 m  
Maximum Tsunami  16:51 JST 11 Mar    2.7 m or more  
Mutsu-shi SekinehamaInitial Tsunami  15:20 JST 11 Mar    (-)    0.1 m  
Maximum Tsunami  18:16 JST 11 Mar    2.9 m  
MiyakoInitial Tsunami  14:48 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  15:21 JST 11 Mar    4.0 m or more  
OfunatoInitial Tsunami  14:46 JST 11 Mar    (-)    0.2 m  
Maximum Tsunami  15:15 JST 11 Mar    3.2 m or more  
KamaishiInitial Tsunami  14:45 JST 11 Mar    (-)    0.1 m  
Maximum Tsunami  15:21 JST 11 Mar    4.1 m or more  
Iwate Kamaishi-oki*Initial Tsunami  14:50 JST 11 Mar    Unknown
Iwate Miyako-oki*Initial Tsunami  14:50 JST 11 Mar    Unknown
Iwate Kuji-oki*Initial Tsunami  14:56 JST 11 Mar    Unknown
Ishinomaki-shi AyukawaInitial Tsunami  14:46 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  15:20 JST 11 Mar    3.3 m or more  
Kesennuma Hirotawan-oki*Initial Tsunami  14:54 JST 11 Mar    Unknown
SakataInitial Tsunami  (*3)
Maximum Tsunami  00:55 JST 12 Mar    0.4 m  
SomaInitial Tsunami  14:55 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  15:50 JST 11 Mar    7.3 m or more  
Fukushima Onahama-oki*Initial Tsunami  14:52 JST 11 Mar    Unknown
OaraiInitial Tsunami  15:15 JST 11 Mar    (+)    1.8 m  
Maximum Tsunami  16:52 JST 11 Mar    4.2 m  
ChoshiInitial Tsunami  15:13 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  17:22 JST 11 Mar    2.4 m  
Tateyama-shi MeraInitial Tsunami  15:29 JST 11 Mar    (+)    1.3 m  
Maximum Tsunami  17:05 JST 11 Mar    1.6 m  
Tokyo HarumiInitial Tsunami  16:37 JST 11 Mar    (+)    0.8 m  
Maximum Tsunami  19:15 JST 11 Mar    1.3 m  
YokosukaInitial Tsunami  15:52 JST 11 Mar    (+)    0.9 m  
Maximum Tsunami  17:16 JST 11 Mar    1.6 m  
ChibaInitial Tsunami  16:38 JST 11 Mar    (+)    0.7 m  
Maximum Tsunami  18:18 JST 11 Mar    0.9 m  
YokohamaInitial Tsunami  16:09 JST 11 Mar    (+)    0.8 m  
Maximum Tsunami  17:37 JST 11 Mar    1.6 m  
Izu-oshima OkadaInitial Tsunami  14:52 JST 11 Mar    (-)    0.3 m  
Maximum Tsunami  15:49 JST 11 Mar    0.7 m  
Miyakejima TsubotaInitial Tsunami  15:26 JST 11 Mar    Unknown
Maximum Tsunami  15:34 JST 11 Mar    0.8 m  
Hachijojima YaeneInitial Tsunami  15:40 JST 11 Mar    (+)    1.4 m  
Maximum Tsunami  15:48 JST 11 Mar    1.4 m  
Kozushima Kozushima-ko Initial Tsunami  15:40 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  00:30 JST 12 Mar    0.8 m  
Miyakejima AkoInitial Tsunami  15:27 JST 11 Mar    (+)    0.6 m  
Maximum Tsunami  15:39 JST 11 Mar    0.6 m  
Hachijojima KaminatoInitial Tsunami  15:35 JST 11 Mar    (+)    1.2 m  
Maximum Tsunami  15:45 JST 11 Mar    1.2 m  
Chichijima FutamiInitial Tsunami  16:14 JST 11 Mar    (+)    1.0 m  
Maximum Tsunami  16:46 JST 11 Mar    1.8 m  
Minami-torishimaInitial Tsunami  16:51 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  16:55 JST 11 Mar    0.5 m  
OdawaraInitial Tsunami  15:33 JST 11 Mar    (+)    0.9 m  
Maximum Tsunami  15:48 JST 11 Mar    0.9 m  
Niigata Initial Tsunami  18:02 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  04:54 JST 12 Mar    0.2 m  
AwashimaInitial Tsunami  (*3)
Maximum Tsunami  21:05 JST 11 Mar    0.1 m  
Kashiwazaki-shi KujiranamiInitial Tsunami  (*3)
Maximum Tsunami  22:19 JST 11 Mar    0.1 m  
Sado-shi WashizakiInitial Tsunami  (*3)
Maximum Tsunami  00:56 JST 12 Mar    Slight  
ToyamaInitial Tsunami  20:55 JST 11 Mar    (+)    Slight  
Maximum Tsunami  22:37 JST 11 Mar    0.1 m  
Fushiki Toyama-ko ShinminatoInitial Tsunami  21:02 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  22:39 JST 11 Mar    0.1 m  
Suzu-shi NagahashiInitial Tsunami  (*3)
Maximum Tsunami  23:25 JST 11 Mar    0.1 m  
KanazawaInitial Tsunami  21:56 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  12:54 JST 12 Mar    0.2 m  
Tsuruga-koInitial Tsunami  (*3)
Maximum Tsunami  13:58 JST 13 Mar    0.3 m  
Numazu-shi UchiuraInitial Tsunami  16:01 JST 11 Mar    (+)    1.4 m  
Maximum Tsunami  16:16 JST 11 Mar    1.4 m  
ShimizuInitial Tsunami  15:58 JST 11 Mar    (+)    0.9 m  
Maximum Tsunami  16:17 JST 11 Mar    0.9 m  
Minami-izu-cho IrozakiInitial Tsunami  15:43 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  15:56 JST 11 Mar    0.8 m  
OmaezakiInitial Tsunami  16:03 JST 11 Mar    (+)    1.0 m  
Maximum Tsunami  17:18 JST 11 Mar    1.4 m  
MaisakaInitial Tsunami  16:12 JST 11 Mar    (+)    0.7 m  
Maximum Tsunami  17:37 JST 11 Mar    0.8 m  
Shimoda-koInitial Tsunami  15:41 JST 11 Mar    (+)    0.7 m  
Maximum Tsunami  22:55 JST 11 Mar    0.8 m  
ItoInitial Tsunami  15:30 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  15:52 JST 11 Mar    0.7 m  
Nishiizu-cho TagoInitial Tsunami  15:55 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  16:18 JST 11 Mar    0.4 m  
YaizuInitial Tsunami  15:58 JST 11 Mar    (+)    0.8 m  
Maximum Tsunami  16:10 JST 11 Mar    0.8 m  
Tahara-shi AkabaneInitial Tsunami  16:21 JST 11 Mar    (+)    1.1 m  
Maximum Tsunami  17:32 JST 11 Mar    1.6 m  
NagoyaInitial Tsunami  17:43 JST 11 Mar    (+)    0.7 m  
Maximum Tsunami  19:36 JST 11 Mar    1.0 m  
Handa-shi KinuuraInitial Tsunami  17:18 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  21:35 JST 11 Mar    0.7 m  
YokkaichiInitial Tsunami  17:20 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  20:13 JST 11 Mar    0.5 m  
Toyohashi-shi Mikawa-koInitial Tsunami  17:17 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  20:15 JST 11 Mar    0.6 m  
TobaInitial Tsunami  16:34 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  19:13 JST 11 Mar    1.8 m  
OwaseInitial Tsunami  16:17 JST 11 Mar    (+)    1.0 m  
Maximum Tsunami  17:12 JST 11 Mar    1.7 m  
Kumano-shi YukiInitial Tsunami  16:12 JST 11 Mar    (+)    0.7 m  
Maximum Tsunami  16:28 JST 11 Mar    0.7 m  
Mie Owase-oki*Initial Tsunami  16:07 JST 11 Mar    Unknown
MaizuruInitial Tsunami  (*3)
Maximum Tsunami  11:40 JST 13 Mar    0.3 m  
Osaka TempozanInitial Tsunami  18:20 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  21:02 JST 11 Mar    0.6 m  
Misaki-cho TannowaInitial Tsunami  17:30 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  17:59 JST 11 Mar    0.2 m  
Toyooka-shi TsuiyamaInitial Tsunami  (*3)
Maximum Tsunami  01:03 JST 12 Mar    Slight  
KobeInitial Tsunami  17:56 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  03:19 JST 12 Mar    0.3 m  
HimejiInitial Tsunami  18:30 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  20:46 JST 11 Mar    0.2 m  
SumotoInitial Tsunami  17:20 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  17:37 JST 11 Mar    0.2 m  
Nachi-katsuura-cho UragamiInitial Tsunami  16:14 JST 11 Mar    (+)    0.9 m  
Maximum Tsunami  18:06 JST 11 Mar    1.3 m  
Kushimoto-cho Fukuro-koInitial Tsunami  16:16 JST 11 Mar    (+)    0.7 m  
Maximum Tsunami  01:32 JST 12 Mar    1.4 m  
WakayamaInitial Tsunami  17:13 JST 11 Mar    (+)    0.6 m  
Maximum Tsunami  19:35 JST 11 Mar    0.7 m  
Gobo-shi HaraidoInitial Tsunami  16:35 JST 11 Mar    (+)    0.7 m  
Maximum Tsunami  17:57 JST 11 Mar    1.1 m  
Shirahama-cho KatataInitial Tsunami  16:34 JST 11 Mar    (+)    0.9 m  
Maximum Tsunami  00:35 JST 12 Mar    1.0 m  
Wakayama Shirahama-oki*Initial Tsunami  16:25 JST 11 Mar    Unknown
Sakaiminato-shi SakaiInitial Tsunami  (*3)
Maximum Tsunami  05:03 JST 12 Mar    0.3 m  
HamadaInitial Tsunami  (*3)
Maximum Tsunami  07:53 JST 12 Mar    0.1 m  
Oki SaigoInitial Tsunami  (*3)
Maximum Tsunami  04:06 JST 12 Mar    0.1 m  
Tamano-shi UnoInitial Tsunami  18:29 JST 11 Mar    (+)    Slight  
Maximum Tsunami  20:01 JST 11 Mar    0.1 m  
HiroshimaInitial Tsunami  19:28 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  20:11 JST 11 Mar    0.3 m  
KureInitial Tsunami  19:43 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  20:37 JST 11 Mar    0.3 m  
KomatsushimaInitial Tsunami  17:03 JST 11 Mar    (+)    0.7 m  
Maximum Tsunami  19:50 JST 11 Mar    0.7 m  
Tokushima YukiInitial Tsunami  16:37 JST 11 Mar    (+)    1.0 m  
Maximum Tsunami  20:27 JST 11 Mar    1.1 m  
TakamatsuInitial Tsunami  18:20 JST 11 Mar    (+)    Slight  
Maximum Tsunami  19:41 JST 11 Mar    0.2 m  
Sakaide-shi Yoshima-koInitial Tsunami  19:38 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  13:33 JST 12 Mar    0.2 m  
Tadotsu-koInitial Tsunami  19:56 JST 11 Mar    (+)    Slight  
Maximum Tsunami  11:25 JST 12 Mar    0.2 m  
UwajimaInitial Tsunami  17:42 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  07:10 JST 12 Mar    0.6 m  
MatsuyamaInitial Tsunami  18:43 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  23:30 JST 11 Mar    0.2 m  
Imabari-shi OshimaInitial Tsunami  19:28 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  11:40 JST 12 Mar    0.1 m  
Muroto-shi Muroto-misakiInitial Tsunami  16:39 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  04:42 JST 12 Mar    0.6 m  
KochiInitial Tsunami  16:56 JST 11 Mar    (+)    0.6 m  
Maximum Tsunami  21:26 JST 11 Mar    0.6 m  
Tosa-shimizuInitial Tsunami  16:56 JST 11 Mar    (+)    0.9 m  
Maximum Tsunami  01:58 JST 12 Mar    1.3 m  
Susaki-koInitial Tsunami  17:00 JST 11 Mar    (+)    1.4 m  
Maximum Tsunami  20:59 JST 11 Mar    2.6 m  
Shimonoseki-shi Haedomari-koInitial Tsunami  20:28 JST 11 Mar    (+)    Slight  
Maximum Tsunami  03:25 JST 12 Mar    0.1 m  
Shimonoseki-shi Hikoshima-deshimatsuInitial Tsunami  19:22 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  23:09 JST 11 Mar    0.4 m  
TokuyamaInitial Tsunami  18:41 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  08:06 JST 12 Mar    0.4 m  
Ube-koInitial Tsunami  19:08 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  09:14 JST 12 Mar    0.3 m  
Mitajiri Nakanoseki-ko Initial Tsunami  18:42 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  23:39 JST 11 Mar    0.2 m  
Shimonoseki-ko ChofuInitial Tsunami  19:33 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  23:00 JST 11 Mar    0.4 m  
Kitakyushu-shi MojiInitial Tsunami  19:46 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  23:10 JST 11 Mar    0.4 m  
Kanda-koInitial Tsunami  19:26 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  20:16 JST 11 Mar    0.3 m  
Kitakyushu-ko AohamaInitial Tsunami  19:21 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  23:04 JST 11 Mar    0.4 m  
Fukuoka-shi HakataInitial Tsunami  21:06 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  02:12 JST 12 Mar    0.3 m  
Kitakyushu-ko HiagariInitial Tsunami  20:06 JST 11 Mar    (+)    Slight  
Maximum Tsunami  23:10 JST 11 Mar    0.2 m  
Tara-cho OuranozakiInitial Tsunami  19:32 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  08:00 JST 12 Mar    0.2 m  
MisumiInitial Tsunami  19:24 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  06:47 JST 12 Mar    0.1 m  
Yatsushiro-koInitial Tsunami  19:49 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  20:17 JST 12 Mar    0.3 m  
Amakusa-shi Hondo-koInitial Tsunami  19:08 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  21:05 JST 11 Mar    0.8 m  
Kumamoto-koInitial Tsunami  19:41 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  22:30 JST 11 Mar    0.1 m  
Karatsu-koInitial Tsunami  20:43 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  05:15 JST 12 Mar    0.2 m  
Genkai-cho KariyaInitial Tsunami  (*3)
Maximum Tsunami  05:31 JST 12 Mar    0.3 m  
NagasakiInitial Tsunami  18:55 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  21:20 JST 11 Mar    0.8 m  
KuchinotsuInitial Tsunami  18:52 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  10:07 JST 12 Mar    0.2 m  
Fukuejima Fukue-koInitial Tsunami  18:45 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  04:58 JST 12 Mar    0.3 m  
SaseboInitial Tsunami  19:32 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  21:52 JST 11 Mar    0.7 m  
Nagasaki-ko KougoInitial Tsunami  18:49 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  21:22 JST 11 Mar    0.6 m  
Hirado-shi Tabira-koInitial Tsunami  19:36 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  21:56 JST 11 Mar    0.3 m  
Reihoku-machi TororoInitial Tsunami  18:43 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  03:12 JST 12 Mar    0.3 m  
OitaInitial Tsunami  17:49 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  22:29 JST 11 Mar    0.4 m  
Beppu-koInitial Tsunami  17:59 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  22:17 JST 11 Mar    0.5 m  
Saiki-shi MatsuuraInitial Tsunami  17:22 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  17:41 JST 11 Mar    0.4 m  
Hyuga-shi HososhimaInitial Tsunami  16:54 JST 11 Mar    (+)    0.8 m  
Maximum Tsunami  21:47 JST 11 Mar    0.9 m  
Nichinan-shi AburatsuInitial Tsunami  17:05 JST 11 Mar    (+)    1.0 m  
Maximum Tsunami  00:12 JST 12 Mar    1.1 m  
Miyazaki-koInitial Tsunami  17:06 JST 11 Mar    (+)    1.4 m  
Maximum Tsunami  03:33 JST 12 Mar    1.6 m  
Minami-osumi-cho OdomariInitial Tsunami  17:29 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  06:51 JST 12 Mar    0.9 m  
Shibushi-koInitial Tsunami  17:12 JST 11 Mar    (+)    1.1 m  
Maximum Tsunami  17:39 JST 11 Mar    1.1 m  
Tanegashima Nishino-omoteInitial Tsunami  17:20 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  23:45 JST 11 Mar    0.8 m  
Tanegashima KumanoInitial Tsunami  16:52 JST 11 Mar    (+)    0.8 m  
Maximum Tsunami  03:23 JST 12 Mar    1.5 m  
NakanoshimaInitial Tsunami  (*3)
Maximum Tsunami  05:29 JST 12 Mar    0.7 m  
Amami-shi KominatoInitial Tsunami  17:01 JST 11 Mar    (-)    0.1 m  
Maximum Tsunami  01:48 JST 12 Mar    1.2 m  
Amami-shi NazeInitial Tsunami  17:10 JST 11 Mar    (+)    0.4 m  
Maximum Tsunami  01:21 JST 12 Mar    0.5 m  
KagoshimaInitial Tsunami  18:19 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  04:47 JST 12 Mar    0.1 m  
MakurazakiInitial Tsunami  17:55 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  02:28 JST 12 Mar    0.8 m  
AkuneInitial Tsunami  18:38 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  07:18 JST 12 Mar    0.5 m  
NahaInitial Tsunami  18:03 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  21:12 JST 11 Mar    0.6 m  
Nanjo-shi AzamaInitial Tsunami  17:49 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  02:20 JST 12 Mar    0.4 m  
Minami-daito-gyokoInitial Tsunami  17:11 JST 11 Mar    (+)    0.2 m  
Maximum Tsunami  17:24 JST 11 Mar    0.2 m  
Yonagunijima KuburaInitial Tsunami  18:34 JST 11 Mar    (+)    0.1 m  
Maximum Tsunami  04:46 JST 12 Mar    0.2 m  
Ishigakijima Ishigaki-koInitial Tsunami  18:25 JST 11 Mar    (+)    Slight  
Maximum Tsunami  07:01 JST 12 Mar    0.3 m  
Miyakojima HiraraInitial Tsunami  18:37 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  19:34 JST 11 Mar    0.7 m  

*3 mark: Arrival of initial tsunami unconfirmed.

No Tsunami Warnings and Advisories are currently in effect. Pay attention when fishing, swimming or engaging in other activities in the above coastal regions, as there may be still sea-level changes for the time being.

Earthquake Information
 Occurred at 14:46 JST 11 Mar 2011
 Region name SANRIKU OKI
 Latitude38.1N
 Longitude142.9E
 Depth about 20 km
 Magnitude 9.0

*** [Tsunami Observed by offshore GPS buoys(marked with *)] ***

Please note that heights of all tsunamis observed by offshore GPS buoys are described as Unknown in the above text in order to avoid confusion with those observed by tidal stations in coastal areas.
Below are the details of tsunamis observed by offshore GPS buoys.

Iwate Kamaishi-oki*Initial Tsunami  14:50 JST 11 Mar    (-)    0.3 m  
Maximum Tsunami  15:12 JST 11 Mar    6.8 m  
Iwate Miyako-oki*Initial Tsunami  14:50 JST 11 Mar    (-)    0.4 m  
Maximum Tsunami  15:12 JST 11 Mar    6.3 m  
Iwate Kuji-oki*Initial Tsunami  14:56 JST 11 Mar    (-)    0.4 m  
Maximum Tsunami      Arrival of maximum tsunami expected.  
Kesennuma Hirotawan-oki*Initial Tsunami  14:54 JST 11 Mar    (+)    6.0 m  
Maximum Tsunami  15:14 JST 11 Mar    6.0 m  
Fukushima Onahama-oki*Initial Tsunami  14:52 JST 11 Mar    (+)    1.0 m  
Maximum Tsunami  15:04 JST 11 Mar    1.0 m  
Mie Owase-oki*Initial Tsunami  16:07 JST 11 Mar    (+)    0.5 m  
Maximum Tsunami  16:26 JST 11 Mar    0.5 m  
Wakayama Shirahama-oki*Initial Tsunami  16:25 JST 11 Mar    (+)    0.3 m  
Maximum Tsunami  16:38 JST 11 Mar    0.3 m  

All tsunamis described here were observed offshore, and are therefore expected to increase in size by the time they reach coastal areas.

** [Estimated tsunami heights and arrivals times at coastal areas near offshore GPS buoys] **
Below are the estimated tsunami heights and arrival times at coastal areas near offshore GPS buoys.

Estimated Tsunami Arrival TimeEstimated Tsunami Height
Iwate Kamaishi  14:55 - 15:10 JST 10 Mar    6 m - 10 m or more  
Iwate Miyako  14:55 - 15:10 JST 10 Mar    6 m - 10 m or more  
Iwate Kuji  15:01 - 15:16 JST 11 Mar    1 m - 2 m  
Kesennuma Hirotawan  14:59 - 15:14 JST 10 Mar    6 m - 10 m or more  
Fukushima Onahama  14:57 - 15:12 JST 10 Mar    1 m - 4 m  
Mie Owase  16:12 - 16:27 JST 11 Mar    1 m - 2 m  
Wakayama Shirahama  16:30 - 16:45 JST 11 Mar    0.5 m  

Tsunamis may have already arrived in some areas.