Strong moderately dangerous earthquake close to Ito, Japan (greater Tokyo area)

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Update May 5, 04:36 UTC : At least 17 people were injured in Kanto area:

9 people in Prefecture Tokyo
5 people in Kanagawa
2 people in Chiba
1 man in Saitama

No major damage was reported from Tokyo area. All injuries resulted in falls or collisions with objects.

Update 21:14 UTC : Below the Focal Mechanism beachball. It indicates a typical subduction earthquake. The Pacific oceanic plate is gliding below the continental plate and sometime hangs. When the energy gets too big, the locked section breaks and triggers an earthquake.

This map shows both the Oceanic Pacific plate and the continental section above it - Strong movement from Pacific plate fromSouth-East to North-West (see beachball from black point towards white point)

This map shows both the Oceanic Pacific plate and the continental section above it - Strong movement from Pacific plate from South-East to North-West (see beach-ball from black point towards white point)

Screen Shot 2014-05-04 at 23.13.45

Screen Shot 2014-05-04 at 23.17.20

Image courtesy http://montessorimuddle.org/ - The earthquake epicenter on this map is from another earthquake

This picture is showing even better was is happening and what we tried to explain above this set of images. This type of earthquakes is calles subduction earthquakes.

Screen Shot 2014-05-04 at 23.30.57

Image courtesy http://montessorimuddle.org/

Update 21:08 UTC : USGS has now increased his Magnitude (recalculation) to M6.0 (before M5.8), depth 155 km. On the basis of the new Magnitude, USGS has recalculated the probably shaking intensity (see below).
The other map shows the fault lines where the earthquake occurred, a dangerous area with regular earthquakes.

Screen Shot 2014-05-04 at 23.09.18Screen Shot 2014-05-04 at 23.09.40

Update 21:04 UTC : The intensity values as reported by JMA agency Japan (official seismological agency from Japan)
JMA5- = * Many people are frightened and feel the need to hold onto something stable.
* Dishes in cupboards and items on bookshelves may fall.
* Unsecured furniture may move, and unstable furniture may topple over
JMA4 = * Most people are startled.
* Hanging objects such as lamps swing significantly.
* Unstable ornaments may fall.

Screen Shot 2014-05-04 at 23.03.23

Update 20:55 UTC : The earthquake happened at 05:18 Japanese time which means a very early wake up call, although we see that most people are returning to their beds now.

Update 20:53 UTC : JMA Japan maintains for the moment their earthquake values as M6.2 at a depth of 160 km. The 5- that they are reporting as potential shaking (equivalent of MMI VI) looks too high for us at the reported depth but we are confident that the Japanese seismologists are to be believed.

Update 20:46 UTC : Of course NO Tsunami watch, advisory or warning for this earthquake. The epicenter is however located in the coastal area.

Update 20:38 UTC : JMA Japan gives a 5- as shaking intensity as maximum. ER considers 5+ as shaking with damage potential, so based on the Japanese data slight damage has not to be excluded

The images below are USGS calculated images. The values from JMA Japan are higher and the shaking MMI VI instead of IV

Screen Shot 2014-05-04 at 22.37.14 Screen Shot 2014-05-04 at 22.37.24 Screen Shot 2014-05-04 at 22.37.34

Update 20:23 UTC : Preliminary Magnitude 5.8 at a dept of 66 km
Update 20:27 UTC : JMA Japan reports a Magnitude of 6.2 but at a depth of 160 km. The intensity is however a 5- which is even at that depth still strong shaking

Screen Shot 2014-05-04 at 22.29.20

Image courtesy and copyright JMA Japan

72 km SW of Yokohama-shi, Japan / pop: 3,574,443 / local time: 05:18:25.0 2014-05-05
26 km SE of Itō, Japan / pop: 71,578 / local time: 05:18:25.0 2014-05-05

Most important Earthquake Data:

Magnitude : 5.9

Local Time (conversion only below land) : 2014-05-05 05:18:25

GMT/UTC Time : 2014-05-04 20:18:25

Depth (Hypocenter) : 150 km

Depth and Magnitude updates in the list below.

Share your earthquake experience (I Have Felt It) with our readers.
Click on the "I Felt It" button behind the corresponding earthquake. Your earthquake experience is not only important for science, but also for people in the area as well as our global readership.

Refresh this list
SRC Location UTC Date/time M D INFO
USGS Ito, Japan May 04 20:18 6.0 155 MAP
  • Asakusa, Tokyp - It scared me right out of bed ..the building was shaking..it felt like it was swaying side to side A vey scary experiencd...I'm glad everyones OK
  • Tokyo - Bed was wobbling. Got woken. Then a sudden jolt so ran to the door.about 30 seconds long all up.
  • tokyo - nee geen schade zat in een aardbeving proof hotel de ritz op de 51 etage werd wel op de hoogte gebracht door luidspreker in de kamer leek los Angeles wel
  • TOKYO - 05/05/2014 à 5h25 du matin. Quelques secousses nous réveillent, l'eau dans la bouteille posée sur la table s'agite. Les suspensions luminaires se balancent légèrement et le sol tremble. Plus de peur que de mal. Nous supposons que c'est un résidu du séisme ayant eu lieu au large du Japon le 04/05/2014
  • Yokohama - The earthquake woke me up from sleep! Scary!
  • Kamagaya/Matsudo - Varied in intensity, from gentle shaking to fairly strong shaking and then dropped off again. It lasted for quite a while (30 seconds?). There was an earlier, weaker quake several hours earlier.
  • Tokyo - wild
  • Fuchu - No damage
  • Kiyose, Tokyo - Started mildly but soon whole condo was really shaking. Lasted about 30 sec., but it was a strong one for the time it lasted. Nothing compared to the strength felt here in Tokyo when the Tohoku Earthquake of 3/11/2011 happened. However, was ready to get the emergency goods backpack and head out the door.
  • Shinjuku - Woke up at about 5.20 due to the bed shaking. I have never experienced an earthquake before so I wasn't sure at the time if it were one or not. I'm staying on the 4th floor of my hotel in Shinjuku Tokyo and there was no damage. People carried on with their day as per norm.
  • Tokyo - Woke up and realised there was an earthquake so woke my husband. It was our first experience of an earthquake so we were at first quite alarmed, but we stayed calm and got to a place of the house where no objects would fall on us.
  • Tokyo - A shake that wake me up. But ended quite quickly for me.
  • Tokyo - J'ai senti une espèce de roulement, puis des secousses et mon lit tanguer
  • Tokyo - Was on holiday in a hotel. Shaking woke me up, was strong in my opinion bouncing around my pod
  • Tokyo - Woke up from the shaking and felt very sick. Since it was my first earthquake i was not sure if it was one. Thought at first i dreamed. Door was shaking but nobody else was alarmed
  • EMSC Near S. Coast Of Honshu, Japan May 04 20:18 6.0 152 MAP
  • Tokyo - Wow! My third quake experience and although not the most violent, definitely the scariest simply because I was 47 floors high! Hoping any aftershocks are only mild!
  • Tokyo - Woken up by shaking. Started-off quite weak becoming stronger and more intense. Lasted quite a long time, maybe 30 seconds.
  • Tokyo - Early morning wake up call. The Nanako announcement system went off, but all in all not serious. (More small wobblers is better than less big wobblers.)
  • Maebashi - No items fell, bed and walls moving
  • Kiyose, Tokyo - Started out slowly but soon whole condo was moving quite violently. Was getting ready to get the emergency goods backpack and head out the door. Nothing fell over or was broken. Lasted about 30 seconds. Was as strong in Tokyo as when the 2011 Tohoku Earthquake hit, but much shorter. Scary!
  • Tokyo - Enough to wake me up. Shaking developed to a swaying at the end and a sound like a thunder clap. Reminders of being in Tokyo in March 2011 when the Sendai quake hit.
  • Minato-ku - Strong enough to wake us up.
  • Yokosuuka - The phone alert system woke me up and the shaking started almost instantly after. It was a decent shaker, the strongest I've been in, and the house was creaking pretty good, I heard doors and windows rattling, and I could hear a distant rumble. It lasted around 20-30 seconds from my reckoning.
  • Yokosuka - I heard the earthquake before the light shake.
  • Tokyo - Hit slow and then intensified suddenly. Some stacked items across the street fell over. Was a little alarming. JMA just had a press conference. The epicenter was near the site of the 1923 quake, but due to the depth they think it is unrelated. Also don't expect many aftershocks but they are recommending people in Tokyo secure household furniture just in case.
  • arakawa ku - 10+ seconds shaking. Can feel the rumble but no damage done. Just windows and doors slamming all around.
  • Minato-ku - Woke up with strange shaking sensation, and then more trembling until metal structures in the building could be heard creaking. Was quite scary and then it stopped.
  • Tokyo - I am on the forth floor apartment and the earthquake woke me up as the bed shook with the building floor. I could hear the light movement of my floor lamp as it shook with the movement of the building. No Dave as far as I know. Nothing crashed. But all the same, one winders about the after effects in the ground.
  • Hadano - Woke me up. Steady shaking for about 20 seconds but no real damage done in apt.
  • Tokyo - Woken at 5.30 AM in my room at 13th floor, lasted for around 30 seconds. This is my first experience but was not so scary.
  • Shinjuku - Hotel was shaking strongly, and many people in the hallways. No damage or injuries though
  • Kanagawa - Bed was shaking left and right for at least 20 seconds. Never felt this strong before
  • Tokyo, Akishima - Started slowly then stronger. Could hear some rumbling from outside first, then the house and windows started shaking, vertically too, with some cracking noise. Lasted maybe 30 seconds. Not a weak one but nothing scary at all too (compared to the March 11, 2011 one). Didn't move from bed and slept deeply again 30 seconds after it.
  • Tokyo - ...
  • Tokyo - Woken up by light shaking. It varied between gentle shakes and larger ones. There was a big jolt which knocked over things on our shelf and then it subsided after that. The small waves lasted for another 10 seconds, 30 seconds in all.
  • Kashiwa-Shi - I was woken up, but my reaction was to be pissed at being woken up. Shaking seemed to go on for 45 seconds but I didn't count. Debated opening doors. No damage to the house and nothing fell over in my room. Shaking happened in a bell curve - light shaking, building up to strong shaking, and eventually tapering off. Could hear rumbling. Overall reaction was to wonder how strong the quake was and to wonder when I could go back to sleep (immediately after shaking subsided).
  • Chiba - Lasted around 10-15 seconds(?) quite moderate. There was a strong spike in-between. Felt my apartment move, but nothing fell over (banzai for anti-quake tech?). No visible damage.
  • Yokohama - Aucun dégât. Une seule brève secousse, mais qui a déplacé mon lit de plusieurs cm. Les autres objets n'ont pas bougé. Chambre d'hôtel au 50e étage, l'immeuble semble avoir absorbé les vibrations et en avoir restitué une partie sous la forme d'une unique secousse.
  • Yokohama - Morning while I was sleeping, i felt like something happening in my dream, but after hearing the local news i came to know that it was an earthquake....It feels like shaking the whole house and something got fell down..Its a thrilling experience for me...
  • Ibaraki-ken - 1st floor concrete apartment. Doors and windows rattled and could definitely feel it. Nothing broken, nothing fallen over. Woke me up on a holiday when I was trying to sleep in. Rolled over and went back to sleep after shaking stopped.
  • Ikebukuro - After living in Japan for a few years, im kinda used to earthquakes. Myself and my wife where awaken by s mild shaking escalating to more violent shaking. No damage to report
  • Tokyo - Bed was shaking and we recognized the earthquake like the one in Roermond 20 years ago
  • GEOFON Near S. Coast Of Honshu, Japan May 04 20:18 5.9 150 MAP I Felt It INFO
  • Tokyo - Keine Schäden, im 11. Stock geweckt worden
  • Tokyo - Pas de degats
  • tokyo - Woke us from out sleep. Glasses rattling strongly.
  • Tokyo - Secoué dans le lit à 5h20, un bruit croissant, une vingtaine de secondes, de bonnes secousses, content que cela s'arrête..
  • Tokyo - I was in a highrise building nearby the dite building in Tokyo And AT around 5.30, the building started to shake a little bit. Nothing to really worry about!
  • Shibuya - Earthquake woke me up in my 3rd floor hotel room. I was worried, since the hotel is a cheap one and the ceiling has a few cracks, but nothing even fell over. The shaking was light to moderate, and lasted maybe 30 seconds.
  • Tokyo - My first quake - hotel was shaking for around 20 seconds
  • tokyo - Tourist visiting and staying on 34th floor of hotel. Woken at 05.20 by building shaking. Scary experience as it felt quite strong. Will donate here! Thank you for the info.
  • Tokyo - Strong single shock - started very "mildly", but then a short (5 second)and strong "impact"...a lot of creaking and cracking in my apartment...scary...
  • Tokyo - Tourist visiting and staying on 26th floor of hotel. Woken at 05.20 by building shaking. Scary experience as it felt quite strong. Enough to wake me up. Shaking developed to a swaying at the end and a sound like a thunder clap.

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    SHARE YOUR EARTHQUAKE EXPERIENCE WITH US

    I felt the shaking *
    Country where you felt the earthquake *
    City/Village where you felt the earthquake *
    Street or suburb (area) where you felt the earthquake
    Latitude (area) where you felt the earthquake
    Longitude (area) where you felt the earthquake
    Shaking Strength *
    MMI II (Very weak shaking) ?
    People :
    Felt by persons at rest, on upper floors or favorably placed.
    MMI III (Weak shaking) ?
    People :
    Felt indoors; hanging objects may swing, vibration similar to passing of light trucks, duration may be estimated, may not be recognized as an earthquake.
    MMI IV (Light shaking) ?
    People :
    Generally noticed indoors but not outside. Light sleepers may be awakened. Vibration may be likened to the passing of heavy traffic, or to the jolt of a heavy object falling or striking the building.
    Fittings :
    Doors and windows rattle. Glassware and crockery rattle. Liquids in open vessels may be slightly disturbed. Standing motorcars may rock.
    Structures :
    Walls and frames of buildings, and partitions and suspended ceilings in commercial buildings, may be heard to creak.
    MMI V (Moderate shaking) ?
    People :
    Generally felt outside, and by almost everyone indoors. Most sleepers awakened. A few people alarmed.
    Fittings :
    Small unstable objects are displaced or upset. Some glassware and crockery may be broken. Hanging pictures knock against the wall. Open doors may swing. Cupboard doors secured by magnetic catches may open. Pendulum clocks stop, start, or change rate.
    Structures :
    Some large display windows cracked. A few earthenware toilet fixtures cracked.
    MMI VI (Strong shaking) ?
    People Felt by all. People and animals alarmed. Many run outside. Difficulty experienced in walking steadily.
    Fittings :
    Objects fall from shelves. Pictures fall from walls. Some furniture moved on smooth floors, some unsecured free-standing fireplaces moved. Glassware and crockery broken. Very unstable furniture overturned. Small church and school bells ring. Appliances move on bench or table tops. Filing cabinets or "easy glide" drawers may open (or shut).
    Structures :
    Slight damage to buildings with low standard. Some stucco or cement plaster falls. Large display windows broken. Damage to a few weak domestic chimneys, some may fall.
    Environment :
    Trees and bushes shake, or are heard to rustle. Loose material may be dislodged from sloping ground, e.g. existing slides, talus slopes, shingle slides.
    MMI VII (Very strong shaking) ?
    People
    General alarm. Difficulty experienced in standing. Noticed by motorcar drivers who may stop.
    Fittings :
    Large bells ring. Furniture moves on smooth floors, may move on carpeted floors. Substantial damage to fragile contents of buildings.
    Structures :
    Unreinforced stone and brick walls cracked. Low standard buildings cracked with some minor masonry falls. A few instances of damage to buildings of ordinary workmanship. Unbraced parapets, unbraced brick gables, and architectural ornaments fall. Roofing tiles, especially ridge tiles may be dislodged. Many unreinforced domestic chimneys damaged, often falling from roof-line. Water tanks Type I burst. A few instances of damage to brick veneers and plaster or cement-based linings. Unrestrained water cylinders (hot-water cylinders) may move and leak. Some common windows cracked. Suspended ceilings damaged.
    Environment :
    Water made turbid by stirred up mud. Small slides such as falls of sand and gravel banks, and small rock-falls from steep slopes and cuttings. Instances of settlement of unconsolidated or wet, or weak soils. Some fine cracks appear in sloping ground. A few instances of liquefaction (i.e. small water and sand ejections).
    MMI VIII (Severe shaking) ?
    People Alarm may approach panic. Steering of motorcars greatly affected. Structures : Low standard buildings heavily damaged, some collapse. ordinary workmanship buildings damaged, some with partial collapse. Reinforced masonry or concrete buildings damaged in some cases. A few instances of damage to buildings and bridges designed and built to resist earthquakes. Monuments and pre-1976 elevated tanks and factory stacks twisted or brought down. Some pre-1965 infill masonry panels damaged. A few post-1980 brick veneers damaged. Decayed timber piles of houses damaged. Houses not secured to foundations may move. Most unreinforced domestic chimneys damaged, some below roof-line, many brought down. Environment : Cracks appear on steep slopes and in wet ground. Small to moderate slides in roadside cuttings and unsupported excavations. Small water and sand ejections and localized lateral spreading adjacent to streams, canals, lakes, etc.
    MMI IX (Violent shaking) ?
    Structures Many low standard buildings destroyed. Ordinary workmanship buildings heavily damaged, some collapse. Reinforced masonry or concrete buildings damaged, some with partial collapse. Buildings and bridges designed and built to resist earthquakes damaged in some cases, some with flexible frames seriously damaged. Damage or permanent distortion to some buildings and bridges, designed and built to normal use standards. Houses not secured to foundations shifted off. Brick veneers fall and expose frames. Environment : Cracking of ground conspicuous. Landsliding general on steep slopes. Liquefaction effects intensified and more widespread, with large lateral spreading and flow sliding adjacent to streams, canals, lakes, etc.
    Tell us your experience and how many seconds the shaking lasted + let us know if your property has been damaged (even slight damage). (max. 500 characters)
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