Koumi Town earthquake and Shindo history
小海町
Earthquakes for which stations associated with Koumi Town reported an actual Shindo observation.
Latest observation: Sep 29, 2026, 04:45 AM JSTLocal seismic profile
Since Apr 12, 2015, stations associated with Koumi Town have reported a local reading for 144 earthquakes. Shindo 1 was most common, while the highest local level, Shindo 3, was recorded 2 times.
Latest observationSep 29, 2026
Highest local Shindo3
Observed events144Apr 12, 2015–Sep 29, 2026
Associated observation stations1JMA
Latest observation: Sep 29, 2026
Recent observed earthquakes
No local observation in the last 7 days. Latest observation: Sep 29, 2026
震度1
Sep 29, 2026, 04:45 AM JSTSouthern Ibaraki Prefecture
震度1M4.9 · 50 km · 128 km
Sep 17, 2026, 12:07 AM JSTSouthern Ibaraki Prefecture
震度2M4.8 · 70 km · 146 km
Aug 23, 2026, 02:00 AM JSTSouthern Ibaraki Prefecture
震度3M5.9 · 70 km · 146 km
Jun 26, 2026, 10:29 PM JSTEastern Region · Fuji Five Lakes, Yamanashi Prefecture
震度3M5.6 · 20 km · 73 km
Jun 16, 2026, 07:46 PM JSTSouthern Ibaraki Prefecture
震度1M5.5 · 50 km · 128 km
May 6, 2026, 07:06 PM JSTEastern Kanagawa Prefecture
M4.2 · 100 km · 121 km
1 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.
Associated observation stationsStations: JMA observation catalogue · basemap: OpenFreeMap
Apr 12, 2015 to Sep 29, 2026 · 144 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: Apr 12, 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: Sep 29, 2026
Recent observed earthquakes
144 observed earthquakes
- 震度1Sep 29, 2026, 04:45 JSTSouthern Ibaraki PrefectureShindo in this place: 1 · Event maximum Shindo: 4M4.950 km
- 震度1Sep 17, 2026, 00:07 JSTSouthern Ibaraki PrefectureShindo in this place: 1 · Event maximum Shindo: 3M4.870 km
- 震度2Aug 23, 2026, 02:00 JSTSouthern Ibaraki PrefectureShindo in this place: 2 · Event maximum Shindo: 5−M5.970 km
- 震度3Jun 26, 2026, 22:29 JSTEastern Region · Fuji Five Lakes, Yamanashi PrefectureShindo in this place: 3 · Event maximum Shindo: 6−M5.620 km
- 震度3Jun 16, 2026, 19:46 JSTSouthern Ibaraki PrefectureShindo in this place: 3 · Event maximum Shindo: 5−M5.550 km
- 震度1May 6, 2026, 19:06 JSTEastern Kanagawa PrefectureShindo in this place: 1 · Event maximum Shindo: 3M4.2100 km
- 震度1Apr 18, 2026, 16:21 JSTNorthern Nagano PrefectureShindo in this place: 1 · Event maximum Shindo: 3M3.610 km
- 震度2Apr 18, 2026, 14:54 JSTNorthern Nagano PrefectureShindo in this place: 2 · Event maximum Shindo: 5−M5.110 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.
3
Southern Ibaraki Prefecture茨城県南部
293
Eastern Region · Fuji Five Lakes, Yamanashi Prefecture山梨県東部・富士五湖
192
Northwestern Chiba Prefecture千葉県北西部
92
Central Nagano Prefecture長野県中部
92
Northern Nagano Prefecture長野県北部
92
Off the Coast of Fukushima Prefecture福島県沖
6Local 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) · A20303
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.
#1Major active faultItoigawa-Shizuoka-kozosen fault zone (Northern segment/Central northern segment/Central southern segment)糸魚川－静岡構造線断層帯（北部と中北部と中南部が同時に活動）
Modelled magnitude: M7.4
Read about this model #2Subduction-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 #3Subduction-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 model #4Major active faultItoigawa-Shizuoka-kozosen fault zone (All segment)糸魚川－静岡構造線断層帯（全体が同時に活動）Modelled magnitude: M7.5
Read about this model #5Major active faultItoigawa-Shizuoka-kozosen fault zone (Central northern segment/Central southern segment/Southern segment)糸魚川－静岡構造線断層帯（中北部と中南部と南部が同時に活動）Modelled magnitude: M7.4
Read about this model #6Other active faultKirigamine fault zone霧ヶ峰断層帯Modelled magnitude: M7.0
Read about this model #7Major active faultItoigawa-Shizuoka-kozosen fault zone (Northern segment/Central northern segment)糸魚川－静岡構造線断層帯（北部と中北部が同時に活動）Modelled magnitude: M7.2
Read about this model #8Major active faultItoigawa-Shizuoka-kozosen fault zone (Central southern segment/Southern segment)糸魚川－静岡構造線断層帯（中南部と南部が同時に活動）Modelled magnitude: M7.3
Read about this model #9Major active faultItoigawa-Shizuoka-kozosen fault zone (Central northern segment/Central southern segment)糸魚川－静岡構造線断層帯（中北部と中南部が同時に活動）Modelled magnitude: M7.1
Read about this model #10Major 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 #11Major 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 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 →