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<p><em>http://dx.doi.org/10.17014/ijog.vol3no1.20081</em></p><p><em>On 29</em><em>th </em><em>May 2006, there was a huge mud outpouring in the Porong Subregency, Regency of Sidoarjo, East Jawa and for one year, it had flooded the area of more than 5 km</em><em>2 </em><em>including Porong, Tanggulangin and Jabon Sub-regencies. The mud known as Lumpur Sidoarjo.</em></p> <p><em>The impact of the mud outpouring was the presence of a subsidence around the main outpouring for the width of 6.3 km</em><em>2 </em><em>in ellipse stretching to the north. The subsidence area covered Tanggulangin Sub-regency: Kedungbendo Village, Porong Sub-regency: Siring, Jatirejo, Mindi, and Renokenongo Villages, and Jabon Sub-regency: Pejarakan and Besuki Villages. The rate of the subsidence is ap- proximately 2 cm/day.</em></p> <p> </p>