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Light mag. 4.3 earthquake - Ibaraki, 49 km north of Tokyo, Japan, on Friday, Sep 30, 2022 at 2:58 pm (GMT +9) -

Light mag. 4.3 earthquake - Ibaraki, 49 km north of Tokyo, Japan, on Friday, Sep 30, 2022 at 2:58 pm (GMT +9) Light mag. 4.3 earthquake - Ibaraki, 49 km north of Tokyo, Japan, on Friday, Sep 30, 2022 at 2:58 pm (GMT +9)

Light magnitude 4.3 earthquake at 56 km depth

30 Sep 06:01 UTC: First to report: VolcanoDiscovery after 3 minutes.
30 Sep 06:05: Now using data updates from NIED
30 Sep 06:17: Now using data updates from USGS
Update Fri, 30 Sep 2022, 06:09

Moderate magnitude 4.8 quake hits 46 km northeast of Tokyo, Japan early afternoon

4.8 quake 30 Sep 2:58 pm (GMT +9)
4.8 quake 30 Sep 2:58 pm (GMT +9)
A moderately shallow magnitude 4.8 earthquake was reported early afternoon near Tokyo, Japan.
According to Japan's National Research Institute for Earth Science and Disaster Resilience (NIED), the quake hit on Friday, September 30th, 2022, at 2:58 pm local time at a moderately shallow depth of 46.4 km. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 4.4. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 4.4.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Iwai (pop. 42,500) located 5 km from the epicenter, Sakai (pop. 26,900) 6 km away, Noda (pop. 121,400) 15 km away, Kasukabe (pop. 206,900) 15 km away, Koga (pop. 58,000) 17 km away, Tsukuba (pop. 175,600) 25 km away, Saitama (pop. 1,193,400) 27 km away, Tokyo (pop. 8,336,600) 46 km away, Mito (pop. 246,500) 61 km away, and Yokohama (pop. 3,574,400) 75 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeSep 30, 2022 05:58:37 UTC -
Local time at epicenterFriday, Sep 30, 2022 at 2:58 pm (GMT +9)
StatusConfirmed
Magnitude4.3
Depth55.5 km
Epicenter latitude / longitude36.1175°N / 139.8114°E (Sashima-gun, Ibaraki, Japan)
Antipode36.118°S / 40.189°W
Shaking intensityWeak shaking
Felt37 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoAkagi (74 km / 46 mi)
Nearby towns and cities2 km (1 mi) NNE of Sakai (pop: 26,900) | Show on map | Quakes nearby
11 km (7 mi) NW of Iwai (pop: 42,500) | Show on map | Quakes nearby
11 km (7 mi) SE of Koga (pop: 58,000) | Show on map | Quakes nearby
27 km (17 mi) NNE of Saitama (pop: 1,193,400) | Show on map | Quakes nearby
27 km (17 mi) WSW of Tsukuba (pop: 175,600) | Show on map | Quakes nearby
49 km (30 mi) NNE of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
63 km (39 mi) WSW of Mito (pop: 246,500) | Show on map | Quakes nearby
67 km (42 mi) N of Kawasaki (Kanagawa) (pop: 1,306,800) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 28.4°C (83 F), humidity: 32%, wind: 4 m/s (7 kts) from E
Estimated seismic energy released1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
4.356 kmNear Mito, Ibaraki, JapanUSGS
4.364 kmEASTERN HONSHU, JAPANEMSC
4.356 kmEastern Honshu, JapanRaspberryShake
4.846 km2 Km NNE of Sakai, JapanNIED
4.866 kmEastern Honshu, JapanGFZ

Seismograms

Seismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 152 km / 94 mi | Show on map | Station Info
Seismic station Matsushiro, Japan: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (38)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Hayamiya Nerima Tokyo 179-0085 (42.8 km SSW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s : Light shaking, back and forth horizontally in one dimension, audible rattling. I am sure it was 2:59 because I was at my computer, and I messaged my boyfriend, so I have the time stamp.  
Bunkyo tokyo / Light shaking (MMI IV) / horizontal (sideways) swinging / 15-20 s : I was in the top bunk in my bunk bed and it started to shake horizontally! The shaking was brief and didn't cause any damage.  
Tamagawagakuen / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : I was at my school desk and my chair and desk was shaking and I saw the water bottle etc on my desk was shaking. (reported through our app)  
Toneri (33.8 km S of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Edogawa-ku tokyo (44.8 km S of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Asakusa (45.7 km S of epicenter) [Map] / Weak shaking (MMI III) / 2-5 s
Adachiku (37.5 km S of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s
oizumi gakuen (45.5 km SSW of epicenter) [Map] / Weak shaking (MMI III) : I was at home. Went outside in case there will be stronger aftershocks (reported through our app)  
near Shiroi, Chiba (48.5 km SE of epicenter) [Map] / Weak shaking (MMI III) / single vertical bump / 10-15 s (reported through our app)
Sōka, Saitama (34.8 km S of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : shook house.  
Tokyo, Japan (53.2 km S of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 10-15 s
Komaba, Meguro-ku, Japan (51.8 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 2-5 s : I was sitting on my couch and it shook. (reported through our app)  
Tokyo (44.4 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s : Was on the floor with my bunny and felt the floor rocking back and forth  
japan (62.1 km SSW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / very short : Living/Dining room where the table and storage shelf were shaking slightly  
Minami Otsuka (43.7 km S of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s : Sitting in my appartment (reported through our app)  
yokohama (65.5 km SSW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 5-10 s : felt and saw and heared  
Tatebayashi (31.3 km WNW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Light shaking in two rounds (reported through our app)  
Yokohama, Kanagawa (74.9 km SSW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 10-15 s : Lateral shake  
Naka, Tsuchiura-shi, Ibaraki (30.5 km ESE of epicenter) [Map] / Moderate shaking (MMI V) : Small Quake  
Kawagoe, Saitama / Light shaking (MMI IV) / rattling, vibrating / 10-15 s
Shibakoen, Minato-ku, Tokyo-to / Very weak shaking (MMI II) / horizontal (sideways) swinging / 10-15 s : Felt my chair moving/swaying slightly  
Meguro, Tokyo / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
tokyo / Weak shaking (MMI III) / 5-10 s
Shibuya-ku / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s
Azuma / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s
Meguro, Tokyo / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Tokyo, Shibuya / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s
Tokyo / Weak shaking (MMI III) / single lateral shake / 1-2 s (reported through our app)
Fuchu-shi / Weak shaking (MMI III) / 2-5 s
Ojima 4chome / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s
meguro / Light shaking (MMI IV) / rattling, vibrating / very short
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