New Delhi, Jan 21: The coal-belching town of Jharia in Jharkhand continues to be the most polluted city in India, while Delhi has made marginal improvement in reducing its air pollution level, according to a Greenpeace India report released on Tuesday.

Delhi is the 10th-most polluted city in India, according to the report. The city was at the eighth spot a year ago, according to the report for that year.

Average annual levels of PM10, particulate matter less than 10 micrometers in diameter that can enter the lungs and even the bloodstream, in Jharia was 322 micrograms per cubic metre in 2018, more than six times the safe limits of 0-60, according to the report.

Jharkhand's Dhanbad, known for its rich coal reserves and industries, is the second-most polluted city in India, according to the report based on analysis of PM10 data from 287 cities across the country.

Annual average of PM10 levels in Delhi reduced from 240 micrograms per cubic metre in 2017 to 225 in 2018.

Lunglei in Mizoram is the least polluted followed by Meghalaya's Dowki, according to the report.

Six of the top-10 polluted cities are in Uttar Pradesh -- Noida, Ghaziabad, Bareilly, Allahabad, Moradabad and Firozabad.

The Greenpeace report also said 231 of the 287 cities recorded PM10 levels above 60 micrograms per cubic metre on at least 52 days in 2018.

The Central Pollution Control Board has identified 0-60 g/m3 as safe limit for PM10 levels under National Ambient Air Quality Standards (NAAQS).

"For NAAQS, pollution data for 104 days covering all seasons is collected. It is done to maintain uniformity in data collection," according to Dipankar Saha, former head of the CPCB's air quality lab.

In 2015, the Environment Ministry identified 102 cities as "non-attainment" cities (which do not meet National Ambient Air Quality Standards) under the National Clean Air Programme that aims for a 20-30 percent reduction in PM10 and PM2.5 concentrations by 2024, Avinash Chanchal, one of the two authors of the report said.

Ideally, all these 231 cities are non-attainment cities and should be included in NCAP, he said.

"Based on 2018 data, West Bengal, Punjab, Maharashtra, Uttar Pradesh and Orissa have 36, 21, 21, 20 and 15 non-attainment cities respectively," the report said.

The report also said pollution levels across much of the country are so high that even a 30 per cent reduction will still leave levels above NAAQS.

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Jakarta, Apr 27: A strong magnitude 6.1 earthquake shook the southern part of Indonesia's main island of Java on Saturday, but there were no immediate reports of injury or significant property damage.

The U.S. Geological Survey said the quake struck 102 kilometers (63 miles) south of Banjar city at a depth of 68.3 kilometers (42.4 miles). There was no tsunami warning.

High-rises in the capital Jakarta swayed for around a minute and two-story homes shook strongly in the West Java provincial capital of Bandung and in Jakarta's satellite cities of Depok, Tangerang, Bogor and Bekasi. The quake was also felt in other cities in West Java, Yogyakarta and East Java province, according to Indonesia's Meteorology, Climatology and Geophysical Agency.

The agency warned of possible aftershocks.

Earthquakes are frequent across the sprawling archipelago nation, but they are rarely felt in Jakarta.

Indonesia, a seismically active archipelago of 270 million people, is prone to seismic upheaval because of its location on major geological faults known as the Pacific “Ring of Fire.”

A magnitude 5.6 earthquake in 2022 killed at least 602 people in West Java's Cianjur city. It was the deadliest in Indonesia since a 2018 quake and tsunami in Sulawesi killed more than 4,300 people.

In 2004, an extremely powerful Indian Ocean quake set off a tsunami that killed more than 230,000 people in a dozen countries, most of them in Indonesia's Aceh province.