Karuizawa Town earthquake and Shindo history
軽井沢町
Earthquakes for which stations associated with Karuizawa Town reported an actual Shindo observation.
Latest observation: Sep 17, 2026, 12:07 AM JSTLocal seismic profile
Since May 13, 2015, stations associated with Karuizawa Town have reported a local reading for 138 earthquakes. Shindo 1 was most common, while the highest local level, Shindo 4, was recorded 1 times.
Latest observationSep 17, 2026
Highest local Shindo4
Observed events138May 13, 2015–Sep 17, 2026
Associated observation stations3JMA
Latest observation: Sep 17, 2026
Recent observed earthquakes
No local observation in the last 7 days. Latest observation: Sep 17, 2026
震度1
Sep 17, 2026, 12:07 AM JSTSouthern Ibaraki Prefecture
震度2M4.8 · 70 km · 140 km
Aug 23, 2026, 02:00 AM JSTSouthern Ibaraki Prefecture
震度2M5.9 · 70 km · 143 km
Jun 26, 2026, 10:29 PM JSTEastern Region · Fuji Five Lakes, Yamanashi Prefecture
震度1M5.6 · 20 km · 92 km
Jun 26, 2026, 12:46 PM JSTNortheastern Chiba Prefecture
震度2M5.8 · 50 km · 197 km
Jun 25, 2026, 07:30 AM JSTOff the Coast of Iwate Prefecture
震度2M6.9 · 50 km · 539 km
Jun 16, 2026, 07:46 PM JSTSouthern Ibaraki Prefecture
M5.5 · 50 km · 123 km
3 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.
May 13, 2015 to Sep 17, 2026 · 4 records
All years · Shindo 3+ · Clear filtersObservation 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: May 13, 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 17, 2026
Recent observed earthquakes
4 observed earthquakes
- 震度3Mar 16, 2022, 23:36 JSTOff the Coast of Fukushima PrefectureShindo in this place: 3 · Event maximum Shindo: 6+M7.360 km
- 震度3Oct 7, 2021, 22:41 JSTNorthwestern Chiba PrefectureShindo in this place: 3 · Event maximum Shindo: 5+M6.180 km
- 震度3Feb 13, 2021, 23:08 JSTOff the Coast of Fukushima PrefectureShindo in this place: 3 · Event maximum Shindo: 6+M7.160 km
- 震度3May 30, 2015, 20:24 JSTOff the west Coast of Ogasawara IslandsShindo in this place: 3 · Event maximum Shindo: 5+M8.5590 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.
2
Southern Ibaraki Prefecture茨城県南部
203
Off the Coast of Fukushima Prefecture福島県沖
162
Northern Ibaraki Prefecture茨城県北部
114
Noto, Ishikawa Prefecture石川県能登地方
92
Off the east Coast of Chiba Prefecture千葉県東方沖
72
Northern Nagano Prefecture長野県北部
7Local 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 · 5438441321
J-SHIS / NIEDGround conditions near an observation station
J-SHIS data for the 250 m mesh containing 軽井沢町追分.
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 25% 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) · A20321
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 faultFukaya fault zone深谷断層帯
Modelled magnitude: M7.2
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 #3Major 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 #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 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 →