Gunma earthquake and Shindo history
群馬県
Earthquakes for which stations associated with Gunma reported an actual Shindo observation.
Latest observation: Sep 22, 2026, 03:34 PM JSTLATEST LOCAL OBSERVATION
Latest earthquake observed in Gunma
震度1
Highest Shindo observed in GunmaSource region: Southern Ibaraki PrefectureM3.9
Local seismic profile
Since Jan 20, 2015, stations associated with Gunma have reported a local reading for 1,032 earthquakes. Shindo 1 was most common, while the highest local level, Shindo 5−, was recorded 2 times.
Latest observationSep 22, 2026
Highest local Shindo5−
Observed events1,032Jan 20, 2015–Sep 22, 2026
Associated observation stations91JMA
Latest observation: Sep 22, 2026
Recent observed earthquakes
Earthquakes for which stations associated with Gunma reported an actual Shindo observation.
震度1
Sep 22, 2026, 03:34 PM JSTSouthern Ibaraki Prefecture
震度1M3.9 · 50 km · 86 km
Sep 17, 2026, 06:11 AM JSTSouthern Ibaraki Prefecture
震度3M3.1 · 50 km · 82 km
Sep 17, 2026, 12:07 AM JSTSouthern Ibaraki Prefecture
震度1M4.8 · 70 km · 99 km
Aug 30, 2026, 12:17 AM JSTOff the east Coast of Chiba Prefecture
震度1M4.8 · 30 km · 178 km
Aug 29, 2026, 06:48 PM JSTNorthern Gunma Prefecture
震度1M3.2 · 0 km · 55 km
Aug 27, 2026, 04:21 AM JSTOff the Coast of Sanriku
M6.1 · 10 km · 465 km
91 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 20, 2015 to Sep 22, 2026 · 1,032 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 20, 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 22, 2026
Recent observed earthquakes
1,032 observed earthquakes
- 震度1Sep 22, 2026, 15:34 JSTSouthern Ibaraki PrefectureShindo in this place: 1 · Event maximum Shindo: 3M3.950 km
- 震度1Sep 17, 2026, 06:11 JSTSouthern Ibaraki PrefectureShindo in this place: 1 · Event maximum Shindo: 1M3.150 km
- 震度3Sep 17, 2026, 00:07 JSTSouthern Ibaraki PrefectureShindo in this place: 3 · Event maximum Shindo: 3M4.870 km
- 震度1Aug 30, 2026, 00:17 JSTOff the east Coast of Chiba PrefectureShindo in this place: 1 · Event maximum Shindo: 4M4.830 km
- 震度1Aug 29, 2026, 18:48 JSTNorthern Gunma PrefectureShindo in this place: 1 · Event maximum Shindo: 1M3.20 km
- 震度1Aug 27, 2026, 04:21 JSTOff the Coast of SanrikuShindo in this place: 1 · Event maximum Shindo: 2M6.110 km
- 震度1Aug 26, 2026, 08:33 JSTSouthern Ibaraki PrefectureShindo in this place: 1 · Event maximum Shindo: 2M3.450 km
- 震度4Aug 23, 2026, 02:00 JSTSouthern Ibaraki PrefectureShindo in this place: 4 · Event maximum Shindo: 5−M5.970 km
Regional context
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.
5−
Southern Ibaraki Prefecture茨城県南部
2314
Off the Coast of Fukushima Prefecture福島県沖
1233
Off the Coast of Ibaraki Prefecture茨城県沖
1044
Northern Ibaraki Prefecture茨城県北部
714
Northwestern Chiba Prefecture千葉県北西部
483
Northern Tochigi Prefecture栃木県北部
34Local 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) · A10000
J-SHIS / NIEDEarthquake scenarios affecting this place
Official J-SHIS models ranked for their potential impact on this prefecture.
#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 #2Major active faultOta fault太田断層Modelled magnitude: M6.9
Read about this model #3Major active faultOkubo fault大久保断層Modelled magnitude: M7.0
Read about this model #4Subduction-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 #5Major active faultKatashinagawa-sagan fault片品川左岸断層Modelled magnitude: M6.8
Read about this model #6Major active faultUchinokomori fault内ノ籠断層Modelled magnitude: M6.8
Read about this model #7Major 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 #8Major 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 #9Major 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 model #10Subduction-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 #11Major active faultAyasegawa fault (Kounosu-Ina segment)綾瀬川断層鴻巣－伊奈区間Modelled magnitude: M6.5
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
Municipalities in this prefecture
Municipalities with an observation history, ordered alphabetically. Counts depend on station coverage and the available data period; they are not a risk ranking.
Annaka City安中市
250 Observed eventsShindo 4
→Chiyoda Town千代田町
465 Observed eventsShindo 5−
→Fujioka City藤岡市
140 Observed eventsShindo 4
→Higashiagatsuma Town東吾妻町
167 Observed eventsShindo 4
→Isesaki City伊勢崎市
420 Observed eventsShindo 4
→Itakura Town板倉町
351 Observed eventsShindo 4
→Kanna Town神流町
179 Observed eventsShindo 3
→Kanra Town甘楽町
169 Observed eventsShindo 3
→Katashina Village片品村
293 Observed eventsShindo 3
→Kawaba Village川場村
91 Observed eventsShindo 3
→Kiryu City桐生市
640 Observed eventsShindo 4
→Kusatsu Town草津町
80 Observed eventsShindo 3
→Maebashi City前橋市
466 Observed eventsShindo 4
→Midori Cityみどり市
295 Observed eventsShindo 4
→Minakami Townみなかみ町
173 Observed eventsShindo 3
→Naganohara Town長野原町
60 Observed eventsShindo 2
→Nakanojo Town中之条町
138 Observed eventsShindo 3
→Numata City沼田市
579 Observed eventsShindo 4
→Oizumi Town大泉町
340 Observed eventsShindo 4
→Ora Town邑楽町
646 Observed eventsShindo 4
→Ota City太田市
404 Observed eventsShindo 5−
→Shibukawa City渋川市
672 Observed eventsShindo 5−
→Shimonita Town下仁田町
57 Observed eventsShindo 2
→Shinto Village榛東村
123 Observed eventsShindo 3
→Takasaki City高崎市
283 Observed eventsShindo 4
→Tamamura Town玉村町
160 Observed eventsShindo 3
→Tatebayashi City館林市
341 Observed eventsShindo 4
→Tomioka City富岡市
162 Observed eventsShindo 3
→Tsumagoi Village嬬恋村
56 Observed eventsShindo 3
→Yoshioka Town吉岡町
208 Observed eventsShindo 4
→Understand local Shindo in context
Guides to this place’s history, seismic intensity and notification tools.
8 min readJapan’s Shindo Scale: Earthquake Intensity Levels 0–7
Learn what Japan’s Shindo earthquake intensity scale measures, what levels 0, 5 Lower, 5 Upper and 7 mean, and why Shindo 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 →