Tama Area Seismic Intensity 3: M5.5 Earthquake in Southern Ibaraki (Evening of June 16) — Shaking and Traffic Conditions by City
At approximately 7:46 PM on June 16, 2026, an earthquake with a magnitude of 5.5 struck southern Ibaraki Prefecture.
The depth of the epicenter was approximately 50 kilometers.
Earthquake Overview
According to Japan Meteorological Agency (JMA), a seismic intensity of lower 5 was recorded in Ota City and Chiyoda Town in Gunma Prefecture, and in Kazo City, Honjo City, and Matsubushi Town in Saitama Prefecture.
There is no risk of tsunami.
In the Tama area, seismic intensity 3 was recorded across both eastern and western Tokyo Tama zones.
The quake hit as the evening rush hour was winding down, and social media platform X (formerly Twitter) was flooded with posts saying "that was a big one" and "it felt like it lasted a long time."
Seismic Intensity by City in the Tama Area
Here is a summary of seismic intensity readings for major cities in the Tama area, based on JMA data.
| City/Ward | Seismic Intensity |
|---|---|
| Machida City | 3 |
| Tama City | 3 |
| Hachioji City | 3 |
| Tachikawa City | 3 |
| Musashino City | 3 |
| Hino City (Shinmei) | 3 |
| Other cities in eastern/western Tama | 3 |
Seismic intensity 3 was also recorded in Tokyo's 23 wards, indicating the tremors spread over a wide area.
Intensity 3 means "almost all people indoors feel the shaking, and dishes rattle on shelves."
This is not a level typically associated with major structural damage, but many residents would have felt the shaking clearly.
Impact on Transportation
Immediately after the earthquake, railway operators across the greater Tokyo area are reported to have implemented temporary speed restrictions for safety checks.
Lines serving the Tama area — including the JR Chuo Line, Keio Line, Odakyu Line, and Tama Monorail — have not confirmed any major disruptions such as extended service suspensions as of now.
For the latest service updates, please check JR East's train information page.
As for road traffic, there are no reports of major road closures or traffic restrictions in the Tama area.
This information may be updated as further reports come in.
Safety Checklist After the Earthquake
At seismic intensity 3, significant structural damage is uncommon.
That said, here are some things worth checking:
The Tama area lies within the seismically active Kanto region.
This earthquake is a good reminder to review your household disaster preparedness — emergency supplies, food reserves, and evacuation plans.
The Tokyo Metropolitan Government's disaster preparedness page offers detailed guidance on what households can do.
Stay Updated with JMA and Local City Websites
For the latest information on this earthquake, check JMA and your city's official disaster preparedness page.
- JMA Earthquake Information
- Machida City Official Website
- Hachioji City Official Website
- Tachikawa City Official Website
- Tama City Official Website
We will continue to provide updates on aftershocks and further developments here on tamafm.com.
Stay safe, Tama area.
多摩エリアのディープな魅力を発信するWebメディア「多摩FM」の公式編集部アカウント。 地域に根ざしたカルチャーやライフスタイル、ちょっとマニアックなローカル情報まで、ラジオのようなどこか心地よい温度感でお届けします！
