For Prelims: D-InSAR (Differential Interferometric Synthetic Aperture Radar), PS-InSAR (Persistent Scatterer Interferometric Synthetic Aperture Radar), Land Subsidence, Katyuri Dynasty, Temple Group Name, Builders, Construction Period, Maximum Tilt Observed
For Mains: Himalayan heritage vulnerability, land subsidence, InSAR technology, Katyuri architecture, climate-induced geological hazards
Source:
Hindustan
5 facts for one-day exams
SSC, railway, police and teaching exams ask direct questions like these.
- It was built by the Katyuri dynasty between the 7th and 12th centuries.
- The main Shiva temple has tilted up to 15 degrees.
- Land subsidence rate is 7.5-11 mm per year.
- The study was published in Springer Nature's Geoheritage journal.
Why in the news?
The 7th-12th century Baijnath temple group in Uttarakhand's Gomati valley is tilting up to 15 degrees and developing cracks due to ongoing land subsidence of 7.5-11 mm per year. A study by UPES and other institutes using D-InSAR and PS-InSAR radar technology, published in Springer Nature's Geoheritage journal, has raised serious conservation concerns for this Katyuri dynasty heritage.
Summary
- Land subsidence in the Gomati valley, measured at 7.5-11 mm/year, has caused the main Shiva temple to tilt 12-15 degrees from its axis and develop cracks up to 55 cm long.
- The study used Differential Interferometric Synthetic Aperture Radar (D-InSAR) and Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) techniques and was published in Springer Nature's Geoheritage journal.
Highlights
Heritage at Risk
The 7th-12th century Baijnath temple group in Uttarakhand is tilting up to 15 degrees due to land subsidence of 7.5-11 mm per year.
Advanced Radar Study
The study used D-InSAR and PS-InSAR satellite radar techniques to measure ground deformation; findings published in Springer Nature's Geoheritage journal.
Historical Damage
The temples were also damaged by earthquakes in 1505 and 1803, compounding the structural stress from ongoing land subsidence.
Key Analysis and Impact
The study reveals that the main Shiva temple has tilted 12-15 degrees from its axis, with walls developing cracks up to 55 cm long. The Parvati and Ganesh temples also show tilting towards the river slope. Columns have rotated 5-15 degrees anticlockwise, and stones have shifted 1-4 cm. The land subsidence rate of 7.5-11 mm/year, measured by D-InSAR and PS-InSAR, directly threatens the structural integrity of the entire temple complex.
Way Forward
Immediate conservation measures are needed to stabilise the temple structures and the surrounding land. Further geological studies and monitoring using InSAR technology should continue. The findings highlight the vulnerability of Himalayan heritage sites to slow-onset geological hazards, requiring integrated disaster risk management for cultural properties.
Radar techniques used in the study
| Technique | Full Form | Measured Subsidence Rate |
|---|---|---|
| D-InSAR | Differential Interferometric Synthetic Aperture Radar | 7.5 mm/year |
| PS-InSAR | Persistent Scatterer Interferometric Synthetic Aperture Radar | 11 mm/year |
Uttarakhand connection
Matters for these Uttarakhand exams:UKPSC 8/10UKSSSC 7/10
Background GK
Textbook concepts you need to understand this news
- D-InSAR (Differential Interferometric Synthetic Aperture Radar)
- A satellite-based radar technique that measures ground deformation by comparing two or more radar images of the same area taken at different times.
- PS-InSAR (Persistent Scatterer Interferometric Synthetic Aperture Radar)
- An advanced InSAR technique that uses stable, permanent reflectors (scatterers) on the ground to measure very slow and subtle ground movements over long periods.
- Land Subsidence
- The gradual sinking or settling of the Earth's surface due to natural or human-induced processes such as groundwater extraction, tectonic activity, or soil compaction.
- Katyuri Dynasty
- An early medieval ruling dynasty of the Kumaon region in present-day Uttarakhand, known for building several temples between the 7th and 12th centuries.
Facts to remember
Tap a card to see the answer. Try to recall it first.
How exams will ask this
- Data: Baijnath temple group tilt: up to 15 degrees; land subsidence rate: 7.5-11 mm/year.
- Data: Cracks in walls: up to 55 cm long; columns rotated 5-15 degrees anticlockwise.
- Data: Earthquakes that damaged temples: 1505 and 1803.
Don't make this mistake!
Swapping the temple's builder (Katyuri dynasty) with another Himalayan dynasty like the Chand dynasty or the Khasas. Also confusing the location: it is in Bageshwar, not in Baijnath district of Himachal Pradesh.
Write these in mains answers
- Himalayan heritage vulnerability, land subsidence, InSAR technology, Katyuri architecture, climate-induced geological hazards
Stuck? Get it in one tap
- It was built by the Katyuri dynasty between the 7th and 12th centuries.
- The main Shiva temple has tilted up to 15 degrees.
- Land subsidence rate is 7.5-11 mm per year.
- The study was published in Springer Nature's Geoheritage journal.
- Geography: Land subsidence and natural hazards
- Art and Culture: Temple architecture of the Katyuri dynasty
Related concepts: D-InSAR (Differential Interferometric Synthetic Aperture Radar), PS-InSAR (Persistent Scatterer Interferometric Synthetic Aperture Radar), Land Subsidence, Katyuri Dynasty
Practice questions
Pick an answer, then read the explanation.
- Q1Easy
Which dynasty built the Baijnath temple group in Uttarakhand?
Explanation: The Katyuri rulers built the Baijnath temple group between the 7th and 12th centuries. The Chand dynasty ruled later in Kumaon, the Khas dynasty is associated with a different region, and the Pala dynasty ruled in Bengal and Bihar.
- Q2Hard
Consider the following statements regarding the Baijnath temple group:
- 1.The Baijnath temple group is located in the Gomati valley of Bageshwar district, Uttarakhand.
- 2.The main Shiva temple has tilted up to 15 degrees from its axis due to land subsidence.
- 3.The study was published in the journal Nature.
Which of the statements given above is/are correct?
Explanation: Statement 1 is correct: the temple group is in the Gomati valley, Bageshwar. Statement 2 is correct: the main Shiva temple has tilted 12-15 degrees. Statement 3 is incorrect: the study was published in Springer Nature's Geoheritage journal, not in Nature itself.
- Q3Medium
What is the rate of land subsidence in the Gomati valley as measured by the PS-InSAR technique?
Explanation: The PS-InSAR technique measured land subsidence at 11 mm per year. The D-InSAR technique measured 7.5 mm per year. 15 mm and 55 mm are incorrect values; 55 cm is the length of cracks found in temple walls.
- Q4Medium
What is the primary reason for the structural tilting and cracking of the Baijnath temple group?
Explanation: The study identifies ongoing land subsidence of 7.5-11 mm per year as the primary cause. Earthquakes in 1505 and 1803 contributed earlier damage but are not the current primary cause. Tourist footfall and construction defects are not cited in the news.
Frequently asked questions
1. How much has the main Shiva temple at Baijnath tilted?
The main Shiva temple has tilted 12 to 15 degrees from its axis due to land subsidence.
2. What technology was used to measure the land subsidence at Baijnath?
Scientists used Differential Interferometric Synthetic Aperture Radar (D-InSAR) and Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) satellite radar techniques.
3. Who built the Baijnath temple group?
The Baijnath temple group was built by the Katyuri dynasty rulers between the 7th and 12th centuries.
All sources
- Original10 November 2026 · Read story
