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Seismic Waves

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Seismic Waves

Consider the following statements with reference to ‘Seismic Waves’:

P-waves are the first waves detected by seismographs (instruments used to detect and record earthquakes).
P-waves can travel through solids and liquids (since they are longitudinal waves) whereas S-waves can only travel through solids (as they are transverse waves).

Choose the correct answer from the options given below:

	A	Only 1

	B	Both 1 and 2

	C	Only 2

	D	Neither 1 nor 2

Your Ans is

Right ans is B

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

P-waves

These are the first waves detected by seismographs (instruments used to detect and record earthquakes).
These are longitudinal waves which means they vibrate along the same direction as they travel.
Examples of longitudinal waves include sound waves and waves in a stretched spring.

S-waves

These waves arrive at the detector after primary waves.
These are transverse waves which means they vibrate at a right angle to the direction in which they travel.
Examples of transverse waves include light waves and water waves.

Difference

Both types of seismic waves can be detected near the earthquake centre but only P-waves can be detected on the other side of the Earth.
P-waves can travel through solids and liquids (since they are longitudinal waves) whereas S-waves can only travel through solids (as they are transverse waves).
This means the liquid part of the core blocks the passage of S-waves.

Related Question

Bara-Lacha Pass

Which of the following statement(s) is/are correct about the Bara-Lacha Pass?

Bara-Lacha Pass is a high mountain pass located in the Pir Panjal Range of Lesser Himalaya.
It is situated along the Leh–Manali Highway.
The pass also acts as a water-divide between the Bhaga River and the Yunan River.

Codes:

	A	1 and 2

	B	2 and 3

	C	Only 2

	D	Only 3

Your Ans is

Right ans is B

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

Context: For the first time ever, the Border Roads Organisation (BRO) has started work on reopening the crucial Baralacha Pass in Himachal Pradesh much before schedule to restore connectivity to Leh in Ladakh.

Bara-lacha la also known as Bara-lacha Pass is a high mountain pass in the Zanskar range connecting the Lahaul district in Himachal Pradesh to Leh district in Ladakh.
It is situated along the Leh–Manali Highway.
The Bhaga river, a tributary of the Chenab River, originates from Surya Taal lake, which is situated a few kilometres from the pass towards Manali.
The pass also acts as a water-divide between the Bhaga River and the Yunan River.

River Dhauliganga

Consider the following statements with reference to the river Dhauliganga:

It originates from Vasudhara Tal and flows through the Nanda Devi National Park.
The river merges with the AlaknandaRiver at Nand Parayag.

Choose the correct statement(s):

	A	Only 1

	B	Both1 and 2

	C	Only 2

	D	Neither 1 nor 2

Your Ans is

Right ans is A

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

Context: A portion of the Nanda Devi glacier broke off in Uttarakhand’s Chamoli district on February 7, 2021,triggering an avalanche and a deluge in the Dhauli Ganga, Rishi Ganga and Alaknanda rivers.

Dhauliganga, which emerges from Vasudhara Tal, is a left tributary of the Alaknanda.
The river flows through the Nanda Devi National Park.
It is joined by the Rishiganga river at Raini.
It merges with the Alaknanda at Vishnuprayag.

NandadeviNational Park

The Nanda Devi National Park or Nanda Devi Biosphere Reserve, established in 1982 is a national park situated around the peak of Nanda Devi (7816 m) in the state of Uttarakhand.
The Park was established as Sanjay Gandhi National Park by Notification in 1982 but was later renamed Nanda Devi National Park.
It was inscribed a World Heritage Site by the United Nations Educational, Scientific and Cultural Organization (UNESCO) in 1988.

Teesta River

Consider the following statements with reference to the Teesta river:

Teesta River is a tributary of the Brahmaputra flowing through India and Bangladesh.
The river flows through the Indian states of Assam and West Bengal before entering the territory of Bangladesh.

Choose the correct answer from the codes given below:

	A	Only 1

	B	Both 1 and 2

	C	Only 2

	D	Neither 1 nor 2

Your Ans is

Right ans is A

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

Teesta river is a tributary of the Brahmaputra (known as Jamuna in Bangladesh), flowing through India and Bangladesh.
It originates in the Himalayas near Chunthang, Sikkim and flows to the south through West Bengal before entering Bangladesh.
The literary meaning of the word ‘Teesta’ is Trishna (desire) which never ends. The legend of the Teesta River is mentioned in KalikaPurana.
Among the other rivers of northern India, Teesta River is also called as younger daughter of Himalaya.
Originally, the river continued southward to empty directly into the Padma River (main channel of Ganga in Bangladesh) but around 1787, the river changed its course to flow eastward to join the JamunaRiver.
The river flows through the Indian states of Sikkim and West Bengal before entering the territory of Bangladesh.

River Nila

Recently, the Ministry of Tourism organised a webinar- ‘Exploring River Nila’ as a part of the Dekho Apna Desh Webinar series. Between which of the following states, does the river Nila flows?

	A	Tamil Nadu and Karnataka

	B	Kerala and Karnataka

	C	Karnataka and Maharashtra

	D	Kerala and Tamil Nadu

Your Ans is

Right ans is D

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

River Nila is also known as Bharathapuzha and Ponnani.
It is the second longest river in Kerala with a length of 209 kilometers.

Origin

The river originates in the Annamalai hills located in the Western Ghats region in Tamil Nadu.

Course

It flows in the west direction along with the many of its tributaries including the Tirur River through Palakkad Gap, Palakkad, Thrissur and Malappuram districts of Kerala.
The Kannadippuzha and Kalpathippuza, the tributaries of Bharathapuzha meet at Parli and flows in the west direction as Bharathapuzha River.
The Bharathapuzha River then surrenders itself into the Arabian Sea at Ponnani.

Main Tributaries

Gayathripuzha River, Kannadipuzha River, Kalpathipuzha River and Thuthapuzha River are the main tributaries of the Bharathapuzha.

Dhauladhar Range

Consider the following statements with reference to the Dhauladhar range:

Dhauladhar ranges are the extension of Pir Panjal into Himachal Pradesh. They are cut across by the river Ravi.
Hanuman Tibba is the highest peak of Dhauladhar range.

Choose the correct answer from the codes given below:

	A	Only 1

	B	Both 1 and 2

	C	Only 2

	D	Neither 1 nor 2

Your Ans is

Right ans is B

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

The Dhauladhar range (The White Range) is part of a lesser Himalayan chain of mountains.
It rises from the Indian plains to the north of Kangra and Mandi in Himachal Pradesh and ends near Badrinath,Uttarakhand.
These ranges are the extension of Pir Panjal into Himachal Pradesh. They are cut across by the river Ravi.
The highest peak in the range is the Hanuman Tibba, approached from Beas Kund/Manali, about 5982m high.
Although mostly composed of granite, the flanks of the range exhibit frequent formations of slate limestone and sandstone
The hill stations of Shimla and Pir Panjal are located in these ranges.
There are glacial lakes in the Dhauladhars. Prominent among them is the Lam Dal which is the biggest with a circumference of about 2.5 km.
One of the major passes across this range is the Indrahar Pass, which forms the border between Kangra and Chamba districts.

Teesta River

Consider the following statements with reference to the Teesta River:

The Teesta River originates in the western Himalayas and flows through the Indian States of Sikkim, Assam and West Bengal before entering Bangladesh, where it flows into the Brahmaputra.
The River originates from the Pahunri (or Teesta Kangse) glacier above 7,068 metres and flows southward through gorges and rapids in the Sikkim Himalaya.

Choose the correct answer from the codes given below:

	A	Only 1

	B	Only 2

	C	Both 1 and 2

	D	Neither 1 nor 2

Your Ans is

Right ans is B

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

Teesta River (or Tista River) is a 315 km long river that rises in the eastern Himalayas, flows through the Indian states of Sikkim and West Bengal .
The river originates from the Pahunri (or Teesta Kangse) glacier above 7,068 metres (23,189 ft), and flows southward through gorges and rapids in the Sikkim Himalaya.
It is joined by the river Rangpo Chu at Rangpo settlement (which is the entrance to East-Sikkim) and then it forms a boundary between Sikkim and West Bengal. The River then flows through Darjeeling district.
The main tributary of river Teesta, the Rangit River meets it just before the Teesta bridge.
Teesta joins the Bramhaputra River (Jamuna River) at Fulchhari in Bangladesh.

Mahadayi River

Consider the following statements with reference to the Mahadayi River:

Mahadayi River rises in the Western Ghats, from the Bhimgad Wildlife Sanctuary in Khanapur taluk of Karnataka’s Belagavi district.
With its cerulean waters, Dudhsagar Falls and Varapoha Falls, it is also known as the Gomati in a few places.

Which of the statement(s) given above is/are correct?

	A	Only 1

	B	Both 1 and 2

	C	Only 2

	D	Neither 1 nor 2

Your Ans is

Right ans is B

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

Mahadayi River rises in the Western Ghats, from the Bhimgad Wildlife Sanctuary in Khanapur taluk of Karnataka’s Belagavi district. Flowing westward, it enters Goa from Sattari taluk of North Goa district.
A number of streams join the flow of the river to form the Mandovi which is one of two major rivers that flow through Goa.
It joins the Arabian Sea at Panaji.
The Mahadayi River, also spelt Mhadei or Mahadeyi, stretches 111-km. Over two-thirds of the river’s stretch lies in Goa (76km).
Mapusa River is an important tributary of Mandovi.
Dudhsagar Falls and Varapoha Falls are important falls located on Mandovi River.

Dihing River

Dihing River is a tributary of a river flowing in north east India.What is the name of that river?

	A	Brahmaputra

	B	Manas

	C	Lohit

	D	Dihang

Your Ans is

Right ans is A

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

Dihing or Burhi Dihing is a large tributary of the Brahmaputra River in Upper Assam in northeastern India.
The river originates in the Eastern Himalayas (the Patkai Hills) in Arunachal Pradesh and flows through Tinsukia and Dibrugarh Districts in Assam to its confluence with the Brahmaputra at Dihingmukh.

Taal Volcano

In which of the following countries Taal Volcano is situated?

	A	Cambodia

	B	Laos

	C	Philippines

	D	Thailand

Your Ans is

Right ans is C

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

Taal Volcano is a large complex volcano filled with a 15 km × 20 km lake located on Luzon Island in the province of Batangas, in the Philippines.
It is the second most active volcano in the Philippines.
Because of its proximity to populated areas and its eruptive history, the volcano was designated a Decade Volcano, worthy of close study to prevent future natural disasters.
The Philippines lies on the Pacific “Ring of Fire,” which is the most seismically and volcanically active zone in the world.

Ghataprabha River

Consider the following statements with reference to the Ghataprabha River:

Flowing through the states of Maharashtra, Andhra and Karnataka, Ghataprabha (river is an important tributary of the Godavari River.
Hiranyakeshi and Markandeya River are tributaries of Ghataprabha.

Choose the correct answer from the codes given below:

	A	Only 1

	B	1 and 2

	C	Only 2

	D	Both 1 and 2

Your Ans is

Right ans is C

Your Answer Is Correct

Your Answer Is Wrong

Explanation :

The Ghataprabha River is an important right-bank tributary of the Krishna River and flows eastward for a distance of 283 kilometers before its confluence with the Krishna River at Almatti.
It originates in the Western Ghats near chaukul village, tehsil sawantwadi in the Sindhudurg district of Maharahtra.
The river basin stretches across Karnataka and Maharashtra states.

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