Minamiboso City earthquake and Shindo history in 2026
南房総市
This annual view includes only earthquakes from 2026 for which stations associated with Minamiboso City recorded Shindo.
Data period: 1 January–31 December 2026In 2026, stations associated with Minamiboso City reported local Shindo for 27 earthquakes. The highest local level recorded that year was Shindo 4.
How observations were spread across 2026
The largest number of observed earthquakes was in January: 6.
Observed earthquakes by month
- Jan6
- Feb1
- Mar1
- Apr3
- May2
- Jun4
- Jul0
- Aug2
- Sep2
- Oct3
- Nov3
- Dec0
If several earthquakes reached the same highest local Shindo, we show the most recent one. Monthly counts depend on station coverage and imported records; they do not establish a seasonal pattern or predict the next earthquake.
Observation history · 2026
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.
Observed events by year
Choose a year to update the event history and local Shindo distribution.
Shindo observed in this place
The highest reading from stations in this place, not the maximum Shindo of the whole event.
Observation history · 2026
27 observed earthquakes
- 震度2Nov 6, 2026, 19:39 JSTOff the east Coast of KantoShindo in this place: 2 · Event maximum Shindo: 3M6.110 km
- 震度1Nov 3, 2026, 14:40 JSTNortheastern Chiba PrefectureShindo in this place: 1 · Event maximum Shindo: 3M4.750 km
- 震度1Nov 1, 2026, 07:15 JSTOff the southeast Coast of Mie PrefectureShindo in this place: 1 · Event maximum Shindo: 3M6.1350 km
- 震度2Oct 29, 2026, 00:07 JSTNortheastern Chiba PrefectureShindo in this place: 2 · Event maximum Shindo: 5−M5.450 km
- 震度2Oct 25, 2026, 11:09 JSTOff the west Coast of Ogasawara IslandsShindo in this place: 2 · Event maximum Shindo: 3M7.0470 km
- 震度1Oct 1, 2026, 21:27 JSTNortheastern Chiba PrefectureShindo in this place: 1 · 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
Ground & J-SHIS
The context below uses the place's full available history and reference models; it is not part of the 2026 statistics.
Where the shaking usually comes from
Source regions of earthquakes observed here, ordered by the number of reports.
Earthquake 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.
Modelled magnitude: M7.9–8.6
Read about this model #2Major active faultKamogawa-teichi fault zone鴨川低地断層帯Modelled magnitude: M6.7
Read about this model #3Other active faultKamogawa-techi fault zone kita fault鴨川低地断層帯北断層Modelled magnitude: M6.8
Read about this model #4Major active faultMiura-hanto fault group (Southern part)三浦半島断層群南部Modelled magnitude: M7.0
Read about this model #5Major active faultMiura-hanto fault group (Main part/Kinugasa/Kitatake fault zone)三浦半島断層群主部衣笠・北武断層帯Modelled magnitude: M6.7
Read about this model #6Major active faultMiura-hanto fault group (Main part/Takeyama fault zone)三浦半島断層群主部武山断層帯Modelled magnitude: M6.5
Read about this model #7Subduction-zone earthquakeLarge Earthquakes along the Nankai Trough南海トラフ沿いで発生する大地震Modelled magnitude: M8.2–9.1
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.
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.
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 →