平成24年報道発表資料 [Fiscal year 2012 (Heisei 24) press release, Material No.2 FY 2011 (Heisei 23) task review report] (PDF) (in Japanese). Tokyo: JMA. 31 May 2012. p. 25/147 sheet, pp. 2–15. Retrieved 11 June 2018.
緊急地震速報の技術的な改善（IPF法）等について [Technical Improvement of Earthquake Early Warning (IPF Method) etc.] (PDF) (in Japanese). Japan Meteorological Agency. 13 December 2016. Retrieved 11 June 2018.
緊急地震速報の技術的改善について ～巨大地震が発生した場合の震度の予想精度が向上します～ [Technical Improvement of Earthquake Early Warning – Improvement of prediction accuracy of seismic intensity in the event of a huge earthquake] (in Japanese). Japan Meteorological Agency. 8 March 2018. Retrieved 11 June 2018.
data.jma.go.jp
東北地方を中心とした地域で発生する地震に係る緊急地震速報（予報及び警報）の発表について [On the announcement of the emergency earthquake warning (forecast and alarm) related to the earthquake occurring in the area mainly in the Tohoku region] (PDF) (in Japanese). Japan Meteorological Agency. 11 March 2011. Retrieved 11 June 2018.
PLUM法の概要 [Outline of PLUM method] (PDF) (in Japanese). Japan Meteorological Agency. 12 July 2017. Retrieved 11 June 2018.
Sankei-MSN News (2011-05-01 21:55) "The Earthquake Early Warning – the chime contained the tone of pains, even examined the 'Godzilla'" 緊急地震速報…チャイムに苦心の音色 「ゴジラ」の検討も (in Japanese). MSN. 1 May 2011. Archived from the original on 13 July 2011. Retrieved 26 June 2011.
「緊急地震速報」について. SoftBank Mobile. 30 May 2007. Retrieved 11 June 2018.
broadband.mb.softbank.jp
「緊急地震速報」について [About "Earthquake Early Warning"] (PDF). SoftBank. 30 May 2007. Archived from the original(PDF) on 22 July 2011. Retrieved 19 March 2011.
Sankei-MSN News (2011-05-01 21:55) "The Earthquake Early Warning – the chime contained the tone of pains, even examined the 'Godzilla'" 緊急地震速報…チャイムに苦心の音色 「ゴジラ」の検討も (in Japanese). MSN. 1 May 2011. Archived from the original on 13 July 2011. Retrieved 26 June 2011.
「緊急地震速報」について [About "Earthquake Early Warning"] (PDF). SoftBank. 30 May 2007. Archived from the original(PDF) on 22 July 2011. Retrieved 19 March 2011.
