Earthquake precursory

Earthquake					Disturbance		Detection
	Place		Magnitude	Date(s)	δα (%) or technique		Duration (days)	Precursory time (days)	ED (km)	Reference
Single events
USA
	Kettleman Hill	USA	5.6	8/4/85	+	100	Not reported	Not reported	300	[67]
	Aladale, California	USA	3.7	June/1983	+	1200	3	15	13	[68,69]
P.R. China
	Pohai Bay	PR China	7.4	6/18/1969	+	60	170	Not reported	170	[70,71]
	Ningshin	PR China	4.3	5/8/71	+	200	40	Not reported	42	[71]
	Hsingtang	PR China	4.9	6/6/74	+	290	16	Not reported	18	[71]
	Haicheng	PR China	7.3	4/2/75	+	38	270	Not reported	50	[71]
	Haicheng	PR China	7.3	4/2/75	+	17	50	Not reported	50	[71]
	Haicheng	PR China	7.3	4/2/75	−	43	66	Not reported	140	[71]
	Haicheng	PR China	7.3	4/2/75	+	20	8	Not reported	140	[71]
	Haicheng	PR China	7.3	4/2/75		Not reported	Not reported	Not reported	26	[71]
	Liaoyang	PR China	4.8	Not reported		Not reported	Not reported	Not reported	32	[71]
	Tangshan	PR China	7.8	6/27/1976	+	15	970	Not reported	50	[71]
	Tangshan	PR China	7.8	6/27/1976	+	50	15	Not reported	100	[71]
	Tangshan	PR China	7.8	6/27/1976	−	40	1370	Not reported	130	[71]
	Tangshan	PR China	7.8	6/27/1976	+	27	162	Not reported	130	[71]
	Tangshan	PR China	7.8	6/27/1976		Not reported	Not reported	Not reported	1800	[72]
	Chienan	PR China	6.0	3/7/1977	+	70	3	1	200	[73]
	Sabteh	PR China	5.2	4/8/1972	+	55	12	Not reported	70	[73]
	Takung	PR China	5.8	9/27/1972	+	34	12	Not reported	54	[73]
	Luhuo	PR China	7.9	2/6/1973	+	120	9	Not reported	200	[74]
	Yiliang	PR China	5.2	4/22/1973	+	41	14	Not reported	340	[73]
	Songpan	PR China	5.2	5/8/1973	+	40	14	Not reported	345	[71]
	Mapien	PR China	5.5	6/29/1973	+	89	9	Not reported	200	[74]
	Lungling	PR China	7.5	5/29/1976	+	20	510	Not reported	20	[71]
	Lungling	PR China	7.5	5/29/1976	+	15	425	Not reported	190	[71]
	Lungling	PR China	7.5	5/29/1976	+	8	160	Not reported	210	[71]
	Lungling	PR China	7.5	5/29/1976	+	12	130	Not reported	215	[71]
	Lungling	PR China	7.5	5/29/1976	+	7	75	Not reported	360	[71]
	Lungling	PR China	7.5	5/29/1976	+	20	290	Not reported	420	[71]
	Lungling	PR China	7.5	5/29/1976	+	200	12	Not reported	450	[71]
	Songpan-Pingwu	PR China	7.2	8/16/1976	+	29	480	Not reported	40	[71]
	Songpan-Pingwu	PR China	7.2	8/16/1976	+	11	420	Not reported	100	[71]
	Songpan-Pingwu	PR China	7.2	8/16/1976	+	20	190	Not reported	100	[71]
	Songpan-Pingwu	PR China	7.2	8/16/1976	+	70	1	Not reported	320	[73]
	Songpan-Pingwu	PR China	7.2	8/16/1976	−	12	200	Not reported	320	[71]
	Songpan-Pingwu	PR China	7.2	8/16/1976	+	90	48	Not reported	340	[71]
	Songpan-Pingwu	PR China	7.2	8/16/1976	−	60	160	Not reported	340	[71]
	Songpan-Pingwu	PR China	7.2	8/16/1976	+	55	160	Not reported	390	[71]
	Songpan-Pingwu	PR China	7.2	8/16/1976	+	110	34	Not reported	560	[71]
	Songpan	PR China	7.2	8/16/1976	+	100	1.5	10	350	[75]
Ex-USSR
	Taschkent	Ex-USSR	5.3	4/26/1966	+	20	400	Not reported	5	[71]
	Taschkent	Ex-USSR	4.0	3/24/1967	+	100	11	Not reported	5	[71]
	Taschkent	Ex-USSR	3.5	6/20/1967	+	23	3	Not reported	5	[71]
	Taschkent	Ex-USSR	3.5	7/22/1967	+	20	3	Not reported	5	[71]
	Taschkent	Ex-USSR	3.0	11/9/1967	+	23	8	Not reported	5	[71]
	Taschkent	Ex-USSR	3.3	11/17/1967	+	23	7	Not reported	5	[71]
	Taschkent	Ex-USSR	3.0	12/17/1967	+	23	4	Not reported	5	[71]
	Uzbekistan	Ex-USSR	4.7	2/13/1973	+	47	5	Not reported	130	[71]
	Markansu	Ex-USSR	7.3	8/11/1974	+	100	100	Not reported	530	[71]
	Tien Shan	Ex-USSR	5.3	2/12/1975	+	10	110	Not reported	100	[71]
	Gazli	Ex-USSR	7.3	5/17/1976	+	220	4	Not reported	470	[71]
	Gazli	Ex-USSR	7.3	5/17/1976	+	25	90	Not reported	550	[71]
	Not reporetd	Ex-USSR	7.0	Not reported		Not reported	Not reported	Not reported	700	[72]
	Gazli	Ex-USSR	7.3	5/17/1976		Not reported	Not reported	Not reported	400	[72]
	Isfarin-Batnen	Ex-USSR	6.6	1/31/1977	−	30	60	Not reported	190	[71,72]
	Isfarin-Batnen	Ex-USSR	6.6	1/31/1977	−	20	125	Not reported	200	[71]
	Alma-Ata	Ex-USSR	7.1	3/24/1978	+	32	50	Not reported	65	[71]
	Zaalai	Ex-USSR	6.7	11/1/1978	−	30	470	Not reported	270	[71]
	Zaalai	Ex-USSR	6.7	11/1/1978	−	40	470	Not reported	300	[71]
	Zaalai	Ex-USSR	6.7	11/1/1978	+	20	75	Not reported	150	[71]
	Zaalai	Ex-USSR	6.7	11/1/1978	−	20	70	Not reported	150	[71]
Italy
	Irpinia	Italy	6.5	11/23/1980	+	25	150	150	220	[76]
	Irpinia	Italy	6.5	11/23/1980	+	170	180	180	200	[76]
	Mt Etna	Italy	3.5(Md)	3/11/01		Not reported	4-5 days	6	650	[18]
India
	Uttarkashi	India	7	10/20/1991	+	200	7	15	450	[77]
	Uttarkashi	India	7.0	10/20/91	+	300	7	15	270	[77]
	Uttarkashi	India	7.0	10/20/1991	+	180	7	3	330	[77]
	Maheshwaram	India	<1	4/17/2002	+	100	<1	Not reported	30	[78]
	Chamoli	India	6.8	3/29/1999	+	69.66 Bq/l	Not reported	2	Not reported	[79]
	Chamoli	India	6.8	3/29/1999	+	46.63 Bq/l	Not reported	2	Not reported	[79]
France
	Ligurian Sea	France	3.9	1/5/86	+	100	5	3	56	[20]
Japan
	Izu-Oshima	Japan	6.8	01/14/1978	+	7	230	Not reported	25	[80,20]
	Izu-Oshima	Japan	6.8	01/14/1978	−	8	7	Not reported	25	[80,20]
	Izu-Oshima-kinkai	Japan	7.0	01/14/1978		Not reported	Not reported	Not reported	25	[24]
	Fukushima	Japan	6.6	Jan 1987	−	2	0	0	260	[80]
	Fukushima	Japan	6.7	Feb 1987	−	11	0	0	130	[80]
	Fukushima	Japan	6.6	Apr 1987	−	9	0	0	110	[80]
	Kobe	Japan	7.2	1/17/1995	+	99	Not reported	60	20	[81]
	Kobe	Japan	7.2	01/17/1995		2 sd above the mean	Not reported	2 months	Not reported	[62]
	Kobe	Japan	7.2	1/17/1995	−	5	Not reported	Not reported	260	[82]
Taiwan
	Chengkung	Taiwan	6.8	10/12/03	−	57.8%	Not reported	65	20	[83]
	Antung	Taiwan	5.0(Mw)	Feb/2008		Not reported	Not reported	Not reported	Not reported	[83]
	Chengkung	Taiwan	6.8(Mw)	10/12/03		Not reported	Not reported	Not reported	55	[83]
	Taitung	Taiwan	6.1(Mw)	1/4/06		Not reported	Not reported	Not reported	55	[83]
Philippines
	Mindoro	Philippines	7.1	11/14/1994	+	600	7	22	48	[84]
Uzbekistan
	Tashkent	Uzbekistan	Not reported	12/13/1980		Not reported	Not reported	Not reported	Not reported	[85]
Turkmenistan
	Ahkhabad	Turkmenistan	5.7	3/14/1983		Not reported	Not reported	Not reported	Not reported	[87]
Antarctica
	Scotia sea	Antarctica	7.5(Ms)	4/8/03		Not reported	Not reported	6	1176	[87]
Algeria
	Boumerdes	Algeria	6.7(ML)	5/21/2003		Not reported	1-3days	2.0-7.0	1120	[88]
Greece
	Kato Achaia, Peloponnese	Greece	6.5(ML)	6/8/08		Other techniques	3-5 days	2-3 months	20	[7]
	Kato Achaia, Peloponnese	Greece	6.5(ML)	6/8/08		Other techniques	3-5 days	2-3 months	20	[26]
	Kato Achaia, Peloponnese	Greece	6.5(ML)	6/8/08		Other techniques	3-5 days	2-3 months	20	[27]
	Kato Achaia, Peloponnese	Greece	6.5(ML)	6/8/08		Other techniques	3-5 days	2-3 months	20	[25]
	Mytilene, Lesvos Island	Greece	5.0(ML)			Other techniques	3-5 days	2-3 months	80	[25]
Multiple events
Iceland
	Southern	Iceland	2.7	7/3/1978	+	380	22	25	14	[89]
	Iceland	Iceland	3.4	8/28/1978	+	60	17	30	5	[89]
	Seismic	Iceland	3.4	8/28/1978	+	280	17	27	21	[89]
	Seismic	Iceland	4.3	11/19/1978	−	80	18	10	16	[89]
	Seismic	Iceland	1.9	6/29/1979	+	40	19	25	9	[89]
	Seismic	Iceland	2.8	9/5/1979	+	40	17	20	8	[89]
	Seismic	Iceland	2.8	9/5/1979	+	100	33	33	5	[89]
	Tjörnes Facture Zone	Iceland	4.1	12/15/1979	+	100	50	50	56	[89]
USA
	South California	USA	2.9	9/24/1977	+	44	1	5	21	[90]
	South California	USA	2.8	12/20/1977	+	40	10	24	12	[90]
	Malibu	USA	4.6	1/1/1979		4 spikes	4 spikes	Not reported	54	[90]
	Pasadena	USA	2.9	9/24/1977	+	25	14	5	21	[90]
	Pasadena	USA	2.8	12/20/1977	+	72	3	Not reported	12	[90]
	Malibu	USA	4.7	1/1/1979	+	225	9	Not reported	54	[90]
	Imperial Valley	USA	6.6	10/15/1979	+	Not reported	2	Not reported	300	[72]
	Raquette Lake	USA	3.9	Not reported		Not reported	10	7	14	[72]
	Blue Mountain Lake	USA	1.5	Not reported	+	36	Not reported	Not reported	1	[72]
	Pearblossom	USA	3.5	11/22/1976	−	50	Not reported	Not reported	25	[71]
	Jocasse	USA	2.3	2/23/1977	+	62	31	Not reported	1	[71]
	Malibu	USA	4.7	1/1/1979	+	310	42	Not reported	20	[71]
	Big Bear	USA	5	6/28/1979	+	72	82	Not reported	85	[71]
	Big Bear	USA	5	6/28/1979	+	400	12	Not reported	31	[71]
	Imperial Valley	USA	6.6	10/15/1979	+	200	45	Not reported	335	[71]
	Imperial Valley	USA	6.6	10/15/1979	+	72	116	60	310	[71]
	Imperial Valley	USA	6.6	10/15/1979	+	64	95	2-7 months	265	[71]
	Imperial Valley	USA	6.6	10/15/1979		Not reported	145	1 year	260	[71]
	Caruthersville, Missouri	USA	4.0	Aug/1981	−	340–504	5 months	Not reported	40	[91]
	Central Arkansas (earthquake swarm)	USA	4.0–4.5	Jan/1982		Not reported	1 year	Not reported	160	[91]
	SW Illinois	USA	4.2	5/15/1983	+	483	2 months	Not reported	120–320	[91]
	New Madrid Seismic Zone	USA	3.5	1/28/1983	+	60	2 months	Not reported	50	[91]
	San Andreas fault	USA	4	12/15/1977		400	30	15	45	[92]
	San Andreas fault	USA	4.2	8/29/1978	+	200	90	240	75	[92]
	Kettleman Hills (California)	USA	5.6	4/8/85		Not reported	Not reported	2weeks	300	[67]
	San Bernadino (California)	USA	5	1/10/85		Not reported	Not reported	6weeks	20 & 90	[67]
Equador
	Reventador	Equador	6.9	6/3/87		Not reported	Not reported	50	367	[93]
	Reventador	Equador	6.9	6/3/87	+	230	Not reported	15-50	377	[93]
	Reventador	Equador	6.9	6/3/87	+	400	Not reported	15-35	339	[93]
	Reventador	Equador	6.9	6/3/87	+	100	Not reported	50	388	[93]
	Reventador	Equador	6.9	6/3/87	+	100	Not reported	15-40	183	[93]
	Reventador	Equador	6.9	6/3/87	+	300	Not reported	15-40	350	[93]
Japan
	Subducted zone	Japan	7.9	6/3/84		Not reported	2	9	1000	[94]
	Not reporetd	Japan	6.7	6/2/87		Not reported	4	3	130	[94]
Taiwan
	Northern Taiwan	Taiwan	5.8	10/18/1980		Not reported	Not reported	19	39	[95]
	Northern Taiwan	Taiwan	5.2	5/14/1981		Not reported	Not reported	11	23	[95]
	Northern Taiwan	Taiwan	4.6	6/21/1981		Not reported	Not reported	15	14	[95]
	Northern Taiwan	Taiwan	5.0	7/18/1981		Not reported	Not reported	4	37	[95]
	Northern Taiwan	Taiwan	5.3	10/31/1982		Not reported	Not reported	51	45	[95]
	Near the Auntung hot spring (5 events)	Taiwan	5.2-6.2	Dec/2003-April/2006		Not reported	Not reported	Not reported	11.0-65.0	[96]
India
	North Andaman	India	5.0	01/14/2005		Not reported	Not reported	Not reported	1215	[97]
	Uttarkashi	India	7.0(Ms)	10/20/1991		Not reported	Not reported	5	293	[98]
	Chamoli	India	6.5(Ms)	03/29/1999		Not reported	Not reported	Not reported	393	[98]
	Chamba	India	5.1(Ms)	03/24/1995		Not reported	Not reported	3	10	[98]
	Kharsali	India	4.9	07/23/2007		Not reported	Not reported	Few days	60	[99]
Indonesia
	Indonesia	Indonesia	9.1	12/26/2004		Not reported	Not reported	Not reported	2275	[97]
	West Sumatra	Indonesia	5.8	9/2/05		Not reported	Not reported	Not reported	2120	[97]
	North Sumatra	Indonesia	5.1	6/1/05		Not reported	Not reported	Not reported	2070	[97]
Turkey
	Western Turkey	Turkey	3	4/6/07		Not reported	Not reported	Not reported	Not reported	[100]
	Western Turkey	Turkey	4.2	11/11/07		Not reported	Not reported	Not reported	Not reported	[100]
Greece
	Chalkida,Evia Island	Greece	5.1(ML)	11/17/14		Other techniques	15 days	1-3 weeks	80	[101]
Seismic Periods
India
	Kangra Valley & Hindu Kush area (6 events)	India	3.8-6.8	3/23/1984-3/17/1987		6 spikes	Not reported	Not reported	150-400	[102]
	Kangra Valley & Hindu Kush area (7 events)	India	Not reported	March/1984-July/1987		7 spikes	Not reported	Not reported	Not reported	[103]
	Hindu Kush area (26 events)	India	4.2-6.4	Oct/1988-Dec/1991		9 spikes	Not reported	Not reported	400-500	[103]
	Kangra Valley (1 event) & Dharamsala (1 event) & North West Himalayas (14 events)	India	2.8-6.6	Aug1989-Dec/1991		4 spikes	Not reported	Not reported	Not reported	[103]
	Sunder Nagar & Himachal Pradesh (3 events)	India	3.2-5.4	Jan/1997-Dec/1997		3 spikes	Not reported	15-66days	Not reported	[104]
	North-West Himalayas (25 events)	India	2.1-6.8	1992-1999		Not reported	Not reported	Not reported	53-393	[105]
	Tehri Garhwal, Himalaya (20 events)	India	1.2-5.7	3/11/2004-12/26/2004		Not reported	Not reported	Not reported	16-250	[106]
	Tehri Garhwal, Himalaya (21 events)	India	1.5-3.7	1/01/2005-12/20/2005		Not reported	Not reported	Not reported	16-250	[106]
	Tehri Garhwal, Himalaya (4 events)	India	2.6-4.6	1/02/2006-5/12/2006		Not reported	Not reported	Not reported	16-250	[106]
	North-West Himalayas (9 events)	India	2.2-5.0	March/2007-June/2008	+	2.6-72.8	Not reported	2-13days	19-196	[107]
	North-West Himalayas (3 events)	India	2.2-5.0	Dec/2006-Sept/2007	+	49-61	Not reported	4-13days	97-201	[29]
	North-West Himalayas (6 events)	India	2.2-5.0	Dec/2006-Dec/2007	+	18.2-47.3	Not reported	3-14days	22-339	[29]
	Not reporetd	India	Not reported	Nov/2005-Nov/2008		Not reported	Not reported	Not reported	Not reported	[58]
Japan
	Earthquakes nearby the Fukushima Prefecture (16 events)	Japan	6.0-6.7	Jan/1984-July/1988		Not reported	Not reported	Few days	100-130 & 400	[108]
Croatia & Bosnia-Herzegovina
	Modrica, Medvednica mountain, West & South west of the monitoring site (7 events)	Croatia and Bosnia-Herzegovina	2.7-3.8	April/1998-April/2000		Not reported	Not reported	30	70-320	[109]
	Not reporetd (19 events)	Croatia	2.6-4.9	01/27/2003-12/15/2006		Not reported	Not reported	Not reported	47-199	[110]
	Not reporetd (10 events)	Croatia	2.7-4.9	6/02/2005-5/26/2007		Not reported	Not reported	Not reported	4.0-295.0	[110]
Slovenia
	Not reporetd (13 events)	Slovenia	0,7-3.2 (ML)	1999-2001		Not reported	Not reported	2.0-33.0	Re/Rd from 0.4 to 2.0	[111]
Taiwan
	Taiwan (30 events)	Taiwan	4.5-6.6 (ML)	03/01/2003-06/30/2004		16 peaks	0.2-12	1.3-20.0	4.9-174.2	[112]
	Taiwan (37 events)	Taiwan	3.7-6.7 (ML)	11/01/2000-05/11/2003		Not reported	Not reported	1.12-13.00	1.5-257.5	[25]
United Kingdom
	English Channel (1 event), Dudley (3 events), Manchester (11 events)	U.K.	1.2-5.0	08/26/2002-10/29/2002		Not reported	6-9-h spikes	Not reported	90.1-250.2	[113]
Spain
	Tenerife Island	Spain	Greater than 2.5	From April 2004-2005		Not reported	Not reported	Several months	Not reported	[114]
Iceland
	South Iceland	Iceland	6.5(Mw)2 events & several magnitude 5+ events	June/2000		Not reported	Not reported	40-144	90.0	[115]
Taiwan

	Taiwan (20 events)	Taiwan	3.7-6.2 (ML)	3/15/2005-8/12/2006		Not reported	Not reported	1.6-13.9	7.6-145.8	[116]
	Hsincheng fault (38 events)	Taiwan	3.0-7.0	1/01/2006-7/14/2008		29 anomalies	Not reported	Not reported	Not reported	[16]
	Hsinhua fault (28 events)	Taiwan	3.0-7.0	1/01/2006-7/14/2008		28 anomalies	Not reported	Not reported	Not reported	[16]
Turkey
	Denizli Basin	Turkey	3.3-4.8	5/04/2000-12/11/2000		Not reported	Not reported	Not reported	3.0 – 23.0	[117]
	East Anatolian Fault (59 events)	Turkey	2.5-5.5	6/22/2004-6/27/2005		Not reported	Not reported	Not reported	Not reported	[118]
	Afyonkarahisar province	Turkey	2.6-3.9	Sep/2009-Sep/2010		Not reported	Not reported	Not reported	Not reported	[119,120]
Iran
	Jooshan (SE of Iran)	Iran	2.6-5.4	Jan/2012-Feb/2012		Not reported	Not reported	3-6days	3.9-163.8	[32,33]
Romania
	Vrancea seismic area (Carpathians) (266 events)	Romania	2.0-4.9	Nov/2012-Nov/2011		Not reported	Not reported	2weeks-1month	Not reported	[34]

Table 1: Earthquake precursory data based on radon gas. Earthquake data, % of disturbance in reference to the baseline values (δα) or technique of analysis, together with duration of measurements, reported precursory time and effective distance (ED) from the epicenter of the earthquake and related references.