Chiba Mihama Ward earthquake and Shindo history
千葉市美浜区
Earthquakes for which stations associated with Chiba Mihama Ward reported an actual Shindo observation.
Latest observation: Oct 8, 2026, 04:13 AM JSTLocal seismic profile
Since Jan 10, 2015, stations associated with Chiba Mihama Ward have reported a local reading for 618 earthquakes. Shindo 1 was most common, while the highest local level, Shindo 4, was recorded 9 times.
Latest observationOct 8, 2026
Highest local Shindo4
Observed events618Jan 10, 2015–Oct 8, 2026
Associated observation stations2JMA
Latest observation: Oct 8, 2026
Recent observed earthquakes
No local observation in the last 7 days. Latest observation: Oct 8, 2026
震度1
Oct 8, 2026, 04:13 AM JSTNortheastern Chiba Prefecture
震度2M4.8 · 50 km · 58 km
Oct 1, 2026, 09:27 PM JSTNortheastern Chiba Prefecture
震度2M5.1 · 50 km · 61 km
Sep 29, 2026, 04:45 AM JSTSouthern Ibaraki Prefecture
震度2M4.9 · 50 km · 53 km
Sep 17, 2026, 12:07 AM JSTSouthern Ibaraki Prefecture
震度2M4.8 · 70 km · 52 km
Aug 30, 2026, 12:17 AM JSTOff the east Coast of Chiba Prefecture
震度4M4.8 · 30 km · 78 km
Aug 23, 2026, 02:00 AM JSTSouthern Ibaraki Prefecture
M5.9 · 70 km · 41 km
2 Associated observation stations
Open this place on the mapStations and strongest local observations
The map combines stations assigned to this place with earthquakes that produced its strongest local readings.
Jan 10, 2015 to Oct 8, 2026 · 618 records
Observation history
This history counts earthquakes observed at stations in the place, not earthquakes whose epicentre lies inside its boundary. Counts can change as stations are updated and older or corrected observations are added.
First observation: Jan 10, 2015
All yearsObserved events by year
Choose a year to update the event history and local Shindo distribution.
All years
All ShindoShindo observed in this place
The highest reading from stations in this place, not the maximum Shindo of the whole event.
Latest observation: Oct 8, 2026
Recent observed earthquakes
618 observed earthquakes
- 震度1Oct 8, 2026, 04:13 JSTNortheastern Chiba PrefectureShindo in this place: 1 · Event maximum Shindo: 4M4.850 km
- 震度2Oct 1, 2026, 21:27 JSTNortheastern Chiba PrefectureShindo in this place: 2 · Event maximum Shindo: 3M5.150 km
- 震度2Sep 29, 2026, 04:45 JSTSouthern Ibaraki PrefectureShindo in this place: 2 · Event maximum Shindo: 4M4.950 km
- 震度2Sep 17, 2026, 00:07 JSTSouthern Ibaraki PrefectureShindo in this place: 2 · Event maximum Shindo: 3M4.870 km
- 震度2Aug 30, 2026, 00:17 JSTOff the east Coast of Chiba PrefectureShindo in this place: 2 · Event maximum Shindo: 4M4.830 km
- 震度4Aug 23, 2026, 02:00 JSTSouthern Ibaraki PrefectureShindo in this place: 4 · Event maximum Shindo: 5−M5.970 km
- 震度1Aug 21, 2026, 21:02 JSTOff the east Coast of Hachijojima IslandShindo in this place: 1 · Event maximum Shindo: 3M5.560 km
- 震度1Aug 20, 2026, 14:28 JSTOff the Coast of Ibaraki PrefectureShindo in this place: 1 · Event maximum Shindo: 3M4.240 km
Ground & J-SHIS
A change in the number of observations cannot by itself predict a larger earthquake.
Local seismic profile
Where the shaking usually comes from
Source regions of earthquakes observed here, ordered by the number of reports.
4
Northwestern Chiba Prefecture千葉県北西部
964
Southern Ibaraki Prefecture茨城県南部
814
Off the Coast of Fukushima Prefecture福島県沖
733
Off the east Coast of Chiba Prefecture千葉県東方沖
732
Off the Coast of Ibaraki Prefecture茨城県沖
583
Northeastern Chiba Prefecture千葉県北東部
38Local seismic profile
Recent observations in long-term context
A change in the number of observations cannot by itself predict a larger earthquake.
Reference model · not a forecast J-SHIS (NIED) · 250 m · 5340307311
J-SHIS / NIEDGround conditions near an observation station
J-SHIS data for the 250 m mesh containing 千葉美浜区ひび野.
How to read these values
A landform class assigned to the whole 250 m mesh and used to estimate AVS30. The name alone does not determine safety, and it is model data rather than a borehole survey at the station.
The average speed of an S-wave through the upper 30 metres. A lower value generally indicates softer material that can amplify shaking more. J-SHIS uses this value to estimate the amplification shown to the right. It is not predicted Shindo.
For the same incoming wave, local ground conditions may make peak-motion velocity at the surface about 118% higher than at engineering bedrock (Vs = 400 m/s). This value describes motion velocity—it does not multiply magnitude or forecast ground acceleration.
Ground conditions can change over short distances. These values do not rate the whole place or the safety of a building, and they cannot predict an earthquake. Source: J-SHIS (NIED), V4 model; processed for presentation by JISHINDESU.
Reference model · not a forecast J-SHIS (NIED) · A12106
J-SHIS / NIEDEarthquake scenarios affecting this place
Official J-SHIS models ranked for their potential impact on this municipality.
#1 means the model ranks highest in the J-SHIS result for this place under the same settings. It is not a ranking of which earthquake will happen next.
Magnitude on a card describes the size of the whole earthquake model, not the Shindo expected here. Local shaking also depends on distance, depth and ground conditions.
#1Subduction-zone earthquakeSagami Trough earthquakes (M8 class)相模トラフ沿いのM8クラスの地震
Modelled magnitude: M7.9–8.6
Read about this model #2Major active faultFukaya/Ayasegawa fault zone (All segment)深谷断層・綾瀬川断層（全体が同時に活動）Modelled magnitude: M7.5
Read about this model #3Subduction-zone earthquakeMega earthquakes along the Japan Trench (Great East Japan Earthquake 2011 type)日本海溝沿いの超巨大地震（東北地方太平洋沖型）Modelled magnitude: M8.6–9.0
Read about this model #4Major active faultFukaya/Ayasegawa fault zone (Fukaya fault zone/Kounosu-Ina segment)深谷断層・綾瀬川断層（深谷断層と鴻巣－伊奈区間が同時に活動）Modelled magnitude: M7.4
Read about this model #5Major active faultFukaya/Ayasegawa fault zone (Kounosu-Ina segment/Ina-Kawaguchi segment)深谷断層・綾瀬川断層（鴻巣－伊奈区間と伊奈－川口区間が同時に活動）Modelled magnitude: M7.0
Read about this modelJ-SHIS 2020 model, 30-year period and Shindo 6-lower threshold. This is not a prediction of a particular earthquake. Source: J-SHIS (NIED); processed for presentation by JISHINDESU.
Local seismic profile
Nearby places
Municipalities nearest to the representative station position.
Understand local Shindo in context
Guides to this place’s history, seismic intensity and notification tools.
8 min readJapan’s Shindo Scale Explained: What Levels 0–7 Mean
Shindo is Japan’s earthquake intensity scale. See what shaking each level means, from 0 to 7, and why a local Shindo reading is different from magnitude.
Read guide →10 min readHow to use the JISHINDESU interactive mapA guide to the redesigned map panel: adding and switching places, ten years of history, filters, local Shindo readings, sharing and notifications.
Read guide →6 min readAre earthquakes becoming more frequent in Japan?How to compare earthquake counts fairly—and why a few active days do not prove a lasting increase.
Read guide →4 min readAway from home? Monitor earthquakes in your Japanese townUse home as the reference point and receive notifications without an account when a station within the selected radius reports your chosen Shindo level.
Read guide →