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Sprite-Attributed Infrasonic Chirps

During a particular night of May 1995 an unusual type of infrasonic signatures: few seconds in duration, rising in frequency from about 0.5 - 8 Hz was observed. Since the observations were associated with the passage of an intense thunderstorm area, it was plausible to assume that the phenomenon could be related to the thunderstorm activity. One possibility was that the infrasonic chirps were produced by the high-altitude transient luminous event such as a red sprite. That particular night was studied in detail and results were presented several years later (Liszka 2003, 2004). The occurrence of infrasonic emissions from sprites was recently confirmed by simultaneous optical observations of sprites and infrasound over Europe (Farges et al., 2005), the long-term trend of sprite-associated infrasound signatures has been studied using the data from the Swedish-Finnish Infrasound Network (Liszka and Hobara, 2006).

The present page contains results of observations of infrasonic chirps from Jämtön-station, where the chirps are most frequent. Approximate geographic coordinates of Jämtön station are: 65.8N, 22.5E.

The list of observations and the atlas of wavelet scalograms will be continuously updated.

References:

Farges, T., E. Blanc, A. Le Pichon, T. Neubert, and T. H. Allin, 2005, Identification of infrasound produced by sprites during the Sprite2003 campaign, Geophys. Res. Lett., 32, doi:10.1029/2004GL021212

Liszka, L., 2003, On the Possible Infrasound Generation by Sprites. Paper presented at the AGU Fall Meeting, 2003, San Francisco.

Liszka, L., 2004, On the possible infrasound generation by sprites, Journ. of Low Frequency Noise, Vibration and Active Control, 23, 85-93.

Liszka, L. and Hobara, Y., 2006, Sprite-attributed infrasonic chirps - their detection, occurrence and properties between 1994 and 2004, JASTP, 68, 1179-1188.

Time scale (in sec) of plots corresponding to the first 32 dilations:

Dilation	Time scale (s)
1	0.1112
2	0.1186507
3	0.1266007
4	0.1350833
5	0.1441342
6	0.1537917
7	0.1640961
8	0.175091
9	0.1868227
10	0.1993403
11	0.2126967
12	0.226948
13	0.2421542
14	0.2583792
15	0.2756914
16	0.2941635
17	0.3138733
18	0.3349037
19	0.3573432
20	0.3812862
21	0.4068335
22	0.4340925
23	0.463178
24	0.4942122
25	0.5273259
26	0.5626583
27	0.600358
28	0.6405837
29	0.6835046
30	0.7293015
31	0.7781668
32	0.8303062

List of observed chirps:

List of observed chirps:

Filename1995-01-03 36 File name (without the first character which is the station name - here all "J")	Date1999-01-01 Date	Time Z start Time Z at the beginning of a chirp (UT in minutes after midnight)	Slope Slope SL of the chirp in the time scale. elapsed time domain SL = HLEN/DIFF	Duration Duration of the chirp in number of samples, HLEN	STARTD STARTD start dilation of the chirp; see the table of time scale values corresponding to each dilation number	DIFF DIFF, the difference between the last and first dilation number +1	Time Z maximum Time Z corresponding to the maximum cross-correlation between microphones within the array	Azimuth of arrival Azimuth of arrival at the maximum cross-correlation	Phase velocity Phase velocity at the maximum cross-correlation	Average amplitude Average amplitude (in arbitrary A/D units) at the maximum cross-correlation	maximum product The maximum product of all 3 cross-correlations within the array
1995-01-03 36	1995-01-03	1086.965	4.7	52	24	11	1087.024	97.4	331.0	13747	0.5267
1995-01-11 32	1995-01-11	962.856	8.1	65	30	8	962.915	99.6	330.2	16012	0.5523
1995-05-26 38	1995-05-26	1151.940	8.3	58	16	7	1151.999	163.9	329.5	10697	0.5051
1995-05-26 40	1995-05-26	1209.384	7.2	87	21	12	1209.399	161.8	331.6	7358	0.4943
1995-05-26 40	1995-05-26	1218.834	6.8	82	22	12	1218.864	131.9	339.9	7052	0.3331
1995-05-26 41	1995-05-26	1230.568	7.6	61	15	8	1230.568	164.1	329.4	7967	0.4745
1995-05-26 41	1995-05-26	1239.119	7.5	97	19	13	1239.193	128.0	339.1	6818	0.2619
1995-05-26 41	1995-05-26	1242.184	8.3	75	15	9	1242.258	163.1	330.4	6320	0.3793
1995-05-26 41	1995-05-26	1243.594	8.2	74	21	9	1243.668	163.1	329.2	12205	0.5680
1995-05-26 41	1995-05-26	1243.594	7.8	47	12	6	1243.668	163.1	329.2	12205	0.5680
1995-05-26 41	1995-05-26	1244.687	6.6	46	24	7	1244.731	142.5	343.0	6075	0.3396
1995-05-26 41	1995-05-26	1245.567	7.0	49	14	7	1245.581	163.1	328.1	12199	0.5303
1995-05-26 41	1995-05-26	1246.794	7.8	70	16	9	1246.808	160.6	329.1	6376	0.3145
1995-05-26 41	1995-05-26	1248.584	7.3	66	19	9	1248.614	127.6	348.8	5027	0.1608
1995-05-26 41	1995-05-26	1249.246	7.0	42	11	6	1249.291	163.3	330.9	10817	0.4952
1995-05-26 41	1995-05-26	1250.790	8.2	107	19	13	1250.819	163.6	328.9	15359	0.5665
1995-05-26 41	1995-05-26	1257.700	5.9	53	16	9	1257.700	125.2	352.5	6305	0.2820
1995-05-26 42	1995-05-26	1268.199	5.9	53	25	9	1268.244	131.2	329.5	11606	0.5368
1995-05-26 42	1995-05-26	1268.781	6.5	39	15	6	1268.781	158.9	326.5	9967	0.3412
1995-05-26 42	1995-05-26	1272.635	5.9	89	21	15	1272.665	158.9	330.4	9863	0.3632
1995-05-26 42	1995-05-26	1277.643	5.3	48	17	9	1277.672	121.9	349.6	6996	0.3327
1995-05-26 42	1995-05-26	1283.937	5.1	36	16	7	1283.937	122.4	349.9	6006	0.2213
1995-05-26 43	1995-05-26	1290.768	6.0	54	21	9	1290.827	123.3	349.1	8194	0.4892
1995-05-26 43	1995-05-26	1296.248	5.7	91	22	16	1296.248	134.5	333.8	7109	0.3521
1995-05-26 43	1995-05-26	1302.235	4.7	80	23	17	1302.280	156.4	327.4	7326	0.3121
1995-05-26 43	1995-05-26	1313.213	5.9	47	14	8	1313.257	118.3	351.7	8891	0.4036
1995-09-03 00	1995-09-03	26.982	3.9	77	28	20	27.027	179.5	325.0	6170	0.5348
1995-09-03 41	1995-09-03	1245.608	8.0	64	23	8	1245.668	184.2	327.5	5328	0.3696
1995-09-03 41	1995-09-03	1247.642	6.3	95	23	15	1247.642	184.6	324.0	12779	0.6155
1995-09-03 41	1995-09-03	1249.903	5.8	93	22	16	1249.903	184.7	327.0	11978	0.5013
1995-09-03 42	1995-09-03	1270.729	5.2	62	20	12	1270.773	186.6	324.9	8312	0.4089
1995-09-03 42	1995-09-03	1286.735	5.1	77	21	15	1286.750	185.6	328.5	6960	0.4273
1995-11-16 32	1995-11-16	970.632	4.9	74	30	15	970.706	98.3	332.8	17245	0.5129
1995-11-28 19	1995-11-28	586.185	2.7	48	29	18	586.230	195.3	304.0	12095	0.6147
1995-12-20 32	1995-12-20	968.689	7.6	99	30	13	968.719	100.5	320.1	20654	0.6257
1995-12-21 32	1995-12-21	982.099	6.1	98	30	16	982.129	99.4	315.4	16912	0.5759
1996-01-17 24	1996-01-17	722.438	4.1	57	30	14	722.497	99.4	339.5	13675	0.5684
1996-02-05 32	1996-02-05	967.332	4.8	62	30	13	967.332	98.5	340.7	11110	0.5684
1996-02-20 18	1996-02-20	546.932	11.9	119	25	10	546.977	197.7	300.0	23212	0.5927
1996-02-21 12	1996-02-21	371.554	4.0	48	26	12	371.613	197.7	307.3	10767	0.5229
1996-03-13 18	1996-03-13	545.602	10.4	114	25	11	545.943	195.7	320.7	12466	0.4468
1996-03-15 18	1996-03-15	544.380	5.7	86	24	15	544.572	169.2	321.7	19713	0.5729
1996-03-15 18	1996-03-15	544.555	5.7	68	21	12	544.555	169.2	321.6	19977	0.5705
1996-03-15 18	1996-03-15	545.201	5.4	86	24	16	545.231	169.1	321.3	18343	0.5483
1996-03-15 20	1996-03-15	625.510	4.8	86	25	18	625.555	168.0	325.4	23037	0.6295
1996-03-15 20	1996-03-15	625.546	4.7	47	17	10	625.828	168.1	326.0	18349	0.5935
1996-03-15 20	1996-03-15	625.668	4.6	65	22	14	625.949	168.1	326.0	18349	0.5935
1996-03-15 20	1996-03-15	625.825	4.7	84	24	18	625.869	168.0	325.9	18547	0.5927
1996-06-20 21	1996-06-20	639.830	5.4	76	28	14	639.874	176.8	315.2	11322	0.4952
1996-06-20 30	1996-06-20	914.754	5.8	46	14	8	914.754	170.9	325.4	5508	0.2430
1996-06-20 31	1996-06-20	948.906	4.4	53	18	12	948.951	155.4	324.9	11128	0.4268
1997-06-06 15	1997-06-06	456.588	4.9	64	30	13	456.618	184.1	320.8	14736	0.5118
1997-12-23 23	1997-12-23	715.964	7.3	66	26	9	716.231	98.2	333.9	16841	0.5901
1997-12-23 23	1997-12-23	716.192	7.0	84	28	12	716.251	97.9	335.0	18885	0.5884
1998-01-12 09	1998-01-12	275.240	4.3	47	29	11	275.314	101.3	328.7	9470	0.5864
1998-01-20 24	1998-01-20	736.331	8.2	74	23	9	736.390	122.4	320.4	16765	0.5084
1998-01-20 35	1998-01-20	1069.312	3.3	50	29	15	1069.342	199.7	302.6	13118	0.5715
1998-02-01 24	1998-02-01	732.651	4.3	43	27	10	732.666	205.8	301.0	9228	0.6017
1998-02-01 24	1998-02-01	733.622	4.8	43	27	9	733.637	205.6	305.0	9608	0.6204
1998-02-01 33	1998-02-01	1003.156	5.2	52	26	10	1003.201	205.8	295.4	7058	0.4958
1998-02-01 33	1998-02-01	1005.331	5.8	58	25	10	1005.345	205.6	303.2	7804	0.5796
1998-02-01 33	1998-02-01	1005.685	5.0	60	27	12	1006.026	205.6	294.8	10335	0.6128
1998-02-01 33	1998-02-01	1005.986	5.5	60	26	11	1006.060	206.2	294.3	10392	0.6316
1998-02-01 33	1998-02-01	1006.063	5.2	57	26	11	1006.122	206.1	295.2	10026	0.6267
1998-02-01 33	1998-02-01	1006.145	5.7	51	26	9	1006.160	206.0	296.0	9876	0.6376
1998-06-27 45	1998-06-27	1369.304	6.9	90	25	13	1369.348	176.7	320.8	4027	0.2414
1998-07-12 29	1998-07-12	873.598	4.0	48	19	12	873.657	125.8	349.6	4972	0.2302
1998-07-12 29	1998-07-12	893.689	3.8	45	22	12	893.719	134.8	343.8	5750	0.3400
1998-07-12 30	1998-07-12	903.500	3.7	66	24	18	903.544	165.4	332.7	13022	0.5765
1998-07-12 30	1998-07-12	907.160	3.5	35	18	10	907.190	131.9	345.3	8507	0.3734
1998-07-12 30	1998-07-12	913.517	3.7	44	19	12	913.531	132.9	340.9	6930	0.2969
1998-07-12 30	1998-07-12	916.085	2.6	37	20	14	916.159	145.4	348.5	8986	0.3869
1999-01-11 01	1999-01-11	44.193	5.0	60	26	12	44.207	196.1	338.3	6432	0.6673
1999-01-27 23	1999-01-27	717.681	6.8	81	27	12	717.756	117.9	297.7	9047	0.6279
1999-01-27 24	1999-01-27	737.908	8.3	58	26	7	737.938	117.7	296.2	8321	0.6616
1999-02-10 21	1999-02-10	649.691	7.0	77	28	11	649.720	154.7	336.4	5808	0.5856
1999-02-10 25	1999-02-10	759.278	4.9	44	24	9	759.278	169.6	341.6	18088	0.4593
1999-02-11 25	1999-02-11	758.358	7.1	50	26	7	758.447	175.0	340.6	6033	0.5721
1999-03-12 24	1999-03-12	737.358	4.3	47	30	11	737.388	178.0	342.8	11599	0.6517
1999-04-14 25	1999-04-14	773.202	6.6	59	23	9	773.202	176.6	342.7	5243	0.5606
1999-04-21 25	1999-04-21	762.791	9.9	79	30	8	762.806	172.9	370.4	6955	0.4007
1999-06-04 23	1999-06-04	703.586	3.6	50	24	14	703.631	176.3	340.9	3559	0.4563
Filename1995-01-03 36 File name (without the first character which is the station name - here all "J")	Date1999-01-01 Date	Time Z start Time Z at the beginning of a chirp (UT in minutes after midnight)	Slope Slope SL of the chirp in the time scale. elapsed time domain SL = HLEN/DIFF	Duration Duration of the chirp in number of samples, HLEN	STARTD STARTD start dilation of the chirp; see the table of time scale values corresponding to each dilation number	DIFF DIFF, the difference between the last and first dilation number +1	Time Z maximum Time Z corresponding to the maximum cross-correlation between microphones within the array	Azimuth of arrival Azimuth of arrival at the maximum cross-correlation	Phase velocity Phase velocity at the maximum cross-correlation	Average amplitude Average amplitude (in arbitrary A/D units) at the maximum cross-correlation	maximum product The maximum product of all 3 cross-correlations within the array
2000-06-21 28	2000-06-21	854.671	6.6	59	15	9	854.686	183.5	345.6	5230	0.3280
2000-06-26 32	2000-06-26	988.291	3.9	58	25	15	988.320	140.5	331.5	3922	0.3077
2000-10-09 25	2000-10-09	768.451	6.1	79	24	13	768.481	185.1	353.9	14410	0.5072
2001-02-27 32	2001-02-27	987.495	7.4	52	27	7	987.540	92.6	298.4	13739	0.6284
2001-03-16 11	2001-03-16	338.111	3.6	36	25	10	338.111	40.8	314.6	3365	0.4705
2001-03-16 11	2001-03-16	344.952	4.7	52	28	11	344.952	39.5	321.1	14445	0.4966
2001-04-05 15	2001-04-05	467.983	5.5	55	25	10	468.072	162.2	342.6	17189	0.5530
2001-04-05 15	2001-04-05	468.071	6.1	55	25	9	468.071	162.3	343.3	17161	0.5725
2001-04-05 17	2001-04-05	527.469	4.5	63	26	14	527.558	165.6	339.3	21108	0.5126
2001-04-05 17	2001-04-05	527.944	7.0	77	25	11	528.004	164.4	340.8	18661	0.6236
2001-04-23 17	2001-04-23	530.106	5.9	77	20	13	530.135	167.9	339.0	5984	0.5052
2001-04-24 21	2001-04-24	659.667	5.2	57	17	11	659.741	167.8	334.1	3645	0.3982
2001-04-26 38	2001-04-26	1159.511	5.1	56	21	11	1159.526	105.0	322.0	3475	0.3807
2001-06-08 24	2001-06-08	734.840	6.8	68	25	10	734.869	158.7	349.9	11461	0.4984
2001-07-11 20	2001-07-11	625.320	4.1	45	17	11	625.350	150.3	365.5	8746	0.5253
2001-07-11 20	2001-07-11	628.881	4.2	51	18	12	628.910	148.5	361.3	7193	0.5643
2001-12-14 20	2001-12-14	620.050	5.7	57	30	10	620.109	103.2	303.3	13675	0.6269
2002-01-28 28	2002-01-28	847.210	5.1	36	28	7	847.240	203.1	363.7	2916	0.2626
2002-01-28 28	2002-01-28	848.891	4.6	37	28	8	848.920	199.5	339.9	3052	0.2660
2002-01-28 28	2002-01-28	850.328	3.9	39	26	10	850.387	203.8	346.9	3074	0.2645
2002-01-28 28	2002-01-28	852.189	3.8	45	27	12	852.219	205.0	342.5	3171	0.3308
2002-01-28 28	2002-01-28	855.020	4.4	35	27	8	855.080	203.2	329.1	3308	0.2932
2002-01-28 28	2002-01-28	856.407	4.0	36	26	9	856.422	206.1	335.7	3426	0.3410
2002-01-28 28	2002-01-28	857.745	4.6	37	25	8	857.760	205.3	334.8	3420	0.3157
2002-01-28 28	2002-01-28	859.055	4.0	44	27	11	859.084	203.9	342.9	3527	0.2421
2002-01-28 28	2002-01-28	860.741	5.1	36	26	7	860.770	205.8	336.2	3483	0.3279
2002-01-28 28	2002-01-28	863.226	3.8	42	27	11	863.256	203.3	332.0	3521	0.2973
2002-01-28 28	2002-01-28	864.528	3.7	44	28	12	864.557	205.5	325.2	3672	0.3485
2002-05-15 14	2002-05-15	438.044	6.6	53	17	8	438.118	169.9	347.9	14183	0.2332
2002-05-15 16	2002-05-15	504.201	5.7	80	20	14	504.290	165.7	344.2	17894	0.4315
2002-07-05 24	2002-07-05	735.569	5.6	95	30	17	735.614	181.0	356.6	11207	0.6585
2003-04-12 01	2003-04-12	44.665	6.9	69	20	10	44.709	142.6	344.2	8921	0.3743
2003-04-12 01	2003-04-12	44.808	7.0	63	20	9	44.808	139.6	343.1	8502	0.3688
2003-05-13 14	2003-05-13	446.310	7.0	49	18	7	446.606	165.4	348.9	9853	0.5242
2003-05-14 19	2003-05-14	586.158	7.2	65	30	9	586.218	166.8	365.5	8848	0.5421
2003-11-25 42	2003-11-25	1264.219	5.9	71	30	12	1264.279	89.7	276.5	9051	0.6057
2004-04-20 15	2004-04-20	461.937	4.0	56	22	14	461.952	165.4	344.8	8023	0.4688
2004-05-04 13	2004-05-04	410.332	8.1	73	16	9	410.406	164.4	344.7	10211	0.4147
2004-05-07 12	2004-05-07	361.883	7.6	99	19	13	361.913	164.2	346.0	6773	0.4822
2004-12-27 33	2004-12-27	1019.442	2.4	39	26	16	1019.501	196.1	350.6	7065	0.4707
2005-01-31 36	2005-01-31	1089.182	2.8	39	25	14	1089.182	195.9	350.9	8108	0.4649
2005-05-05 24	2005-05-05	749.139	7.0	112	22	16	749.183	163.8	347.1	13046	0.4508
2005-12-01 18	2005-12-01	552.316	5.2	57	29	11	552.331	207.8	378.8	4063	0.3783
2006-01-10 11	2006-01-10	337.031	3.3	49	28	15	337.120	194.5	351.8	8556	0.5598
2006-02-11 17	2006-02-11	527.925	6.3	69	29	11	527.955	202.2	415.0	4076	0.2415
2006-02-11 18	2006-02-11	552.428	4.8	58	27	12	552.457	202.0	392.5	3917	0.2995
2006-02-11 19	2006-02-11	594.301	3.8	64	30	17	594.345	204.3	407.9	4032	0.3081
2006-02-12 16	2006-02-12	502.456	6.4	58	25	9	502.456	200.5	421.3	3788	0.2984
2006-02-14 17	2006-02-14	513.943	5.1	41	25	8	513.957	206.9	362.2	4590	0.2090
2006-02-14 17	2006-02-14	536.319	6.3	44	25	7	536.333	201.6	397.8	4243	0.1509
2006-02-14 20	2006-02-14	608.206	5.6	50	26	9	608.220	198.3	365.2	3952	0.2084
2006-02-14 20	2006-02-14	610.330	6.2	37	24	6	610.344	205.2	351.6	4255	0.3329
2006-02-14 21	2006-02-14	645.964	6.1	43	25	7	646.038	204.8	325.5	3775	0.1787
2006-02-21 22	2006-02-21	671.306	3.0	42	26	14	671.306	257.6	373.0	6613	0.5051
2006-03-03 23	2006-03-03	706.510	3.8	42	30	11	706.510	179.6	357.2	7164	0.5505
2006-03-03 26	2006-03-03	790.055	6.6	53	29	8	790.099	163.6	345.1	4050	0.2105
2006-03-04 16	2006-03-04	483.409	3.7	41	22	11	483.409	156.2	336.0	5922	0.3960
2006-03-27 12	2006-03-27	376.028	6.6	46	18	7	376.087	139.5	335.6	4840	0.3771
2006-04-25 13	2006-04-25	400.453	4.0	48	19	12	400.453	165.4	338.2	9973	0.4913
2006-04-25 26	2006-04-25	804.569	6.7	67	21	10	804.584	166.4	352.0	9698	0.3844
2006-04-26 13	2006-04-26	398.985	8.6	103	18	12	398.985	168.0	341.5	11617	0.3759
2006-04-28 12	2006-04-28	383.834	7.9	127	23	16	383.879	166.1	337.1	13366	0.5021
2006-04-30 12	2006-04-30	376.850	7.5	60	14	8	376.850	168.6	343.6	6815	0.3016
2006-05-02 12	2006-05-02	377.050	9.7	155	22	16	377.050	163.9	359.6	12815	0.4456
2006-05-04 17	2006-05-04	519.289	4.7	47	17	10	519.319	164.2	344.9	6974	0.5202
2007-02-23 22	2007-02-23	674.395	11.6	93	30	8	674.455	164.5	350.9	3700	0.6410
2007-02-23 24	2007-02-23	749.596	8.4	143	30	17	749.907	180.7	330.8	7120	0.4798
2007-03-05 26	2007-03-05	782.537	6.9	62	30	9	782.552	163.0	338.2	7835	0.6088
2007-05-15 25	2007-05-15	777.601	3.3	40	20	12	777.645	152.8	353.1	5805	0.4100
2008-04-29 19	2008-04-29	598.651	4.7	47	16	10	598.695	166.5	340.4	3960	0.5598
2008-05-01 12	2008-05-01	388.550	9.1	73	14	8	388.580	165.2	342.0	5036	0.5567
2008-05-01 19	2008-05-01	598.612	6.5	72	18	11	598.627	166.3	343.9	2770	0.4560
2008-05-01 25	2008-05-01	779.687	7.7	77	19	10	779.820	165.7	344.3	4199	0.5554
2009-02-11 46	2009-02-11	1398.660	3.6	57	29	16	1398.705	195.8	339.8	5491	0.6640
2009-02-20 24	2009-02-20	738.589	4.9	59	30	12	738.633	181.1	360.8	10033	0.6104
2009-03-27 02	2009-03-27	61.031	4.2	42	26	10	61.090	195.0	336.8	1339	0.1856
2009-04-09 33	2009-04-09	992.756	9.7	58	29	6	992.800	160.5	361.2	2852	0.3060
2009-04-26 17	2009-04-26	522.875	7.0	42	12	6	522.919	166.7	342.9	2973	0.4288
2009-04-27 12	2009-04-27	379.469	5.1	56	17	11	379.469	167.4	335.2	6287	0.5338
2009-04-27 25	2009-04-27	775.431	5.4	43	14	8	775.445	166.9	337.8	5284	0.5448
2009-05-02 30	2009-05-02	900.655	8.0	88	17	11	900.684	164.6	342.2	3063	0.4776
2009-05-27 26	2009-05-27	795.966	6.9	90	22	13	795.981	163.7	352.8	5486	0.5642
Filename1995-01-03 36 File name (without the first character which is the station name - here all "J")	Date1999-01-01 Date	Time Z start Time Z at the beginning of a chirp (UT in minutes after midnight)	Slope Slope SL of the chirp in the time scale. elapsed time domain SL = HLEN/DIFF	Duration Duration of the chirp in number of samples, HLEN	STARTD STARTD start dilation of the chirp; see the table of time scale values corresponding to each dilation number	DIFF DIFF, the difference between the last and first dilation number +1	Time Z maximum Time Z corresponding to the maximum cross-correlation between microphones within the array	Azimuth of arrival Azimuth of arrival at the maximum cross-correlation	Phase velocity Phase velocity at the maximum cross-correlation	Average amplitude Average amplitude (in arbitrary A/D units) at the maximum cross-correlation	maximum product The maximum product of all 3 cross-correlations within the array
2010-01-13 20	2010-01-13	607.352	6.2	37	21	6	607.396	97.4	310.2	2212	0.4504
2010-01-13 22	2010-01-13	666.787	3.1	53	27	17	666.802	150.8	321.7	6770	0.4574
2010-02-04 28	2010-02-04	841.923	5.4	38	28	7	841.938	133.9	309.3	3131	0.6164
2010-02-10 21	2010-02-10	632.217	7.0	42	24	6	632.276	178.8	341.4	3626	0.7090
2010-02-18 24	2010-02-18	732.381	13.5	81	28	6	732.455	135.4	305.9	3406	0.5359
2010-02-18 24	2010-02-18	738.207	5.3	53	28	10	738.267	176.1	332.3	3102	0.6007
2010-04-26 34	2010-04-26	1049.458	10.8	86	23	8	1049.488	167.9	349.9	6760	0.4087
2010-05-17 25	2010-05-17	779.604	7.9	55	30	7	779.648	164.3	365.9	8194	0.3655
2010-05-18 36	2010-05-18	1087.733	9.0	63	16	7	1087.793	177.8	350.0	9606	0.6614
2010-07-27 02	2010-07-27	75.328	4.6	41	15	9	75.417	180.5	355.2	1931	0.3094
2010-07-27 02	2010-07-27	78.162	4.0	36	16	9	78.221	181.0	354.0	2007	0.3828
2010-07-27 02	2010-07-27	85.254	5.3	53	17	10	85.298	188.2	347.8	1818	0.2873
2010-07-27 03	2010-07-27	116.435	3.5	46	20	13	116.509	179.6	347.8	3917	0.6459
2010-11-18 17	2010-11-18	520.831	2.5	37	30	15	520.890	218.9	363.7	4915	0.5758
2011-02-13 31	2011-02-13	959.219	6.7	60	24	9	959.293	138.4	317.4	2236	0.4555
2011-02-14 16	2011-02-14	484.006	5.2	47	25	9	484.021	142.0	303.3	1694	0.2607
2011-02-14 25	2011-02-14	778.694	7.0	42	29	6	778.739	143.0	310.1	4107	0.5095
2011-02-14 27	2011-02-14	819.742	5.6	39	26	7	819.786	138.2	319.1	1632	0.3216
2011-02-15 22	2011-02-15	670.689	10.2	61	30	6	670.733	152.7	307.2	3156	0.5456
2011-02-23 17	2011-02-23	519.839	7.6	53	26	7	519.898	154.1	325.2	6091	0.5228
2011-02-24 16	2011-02-24	499.775	11.2	67	29	6	499.923	166.0	329.2	3035	0.5617
2011-02-24 16	2011-02-24	499.903	9.6	67	28	7	499.962	165.9	327.9	3008	0.5496
2011-05-16 24	2011-05-16	722.823	4.5	45	23	10	722.853	177.7	349.2	11183	0.6192
2011-05-16 26	2011-05-16	786.012	4.9	44	20	9	786.071	180.4	347.2	12512	0.5183
2011-11-17 32	2011-11-17	977.769	3.2	48	27	15	977.799	216.0	367.1	7026	0.6729
2012-02-08 29	2012-02-08	881.215	7.6	61	30	8	881.215	171.7	354.5	3356	0.6052
2012-04-26 17	2012-04-26	529.687	6.9	76	27	11	529.717	172.0	342.7	3745	0.4694
2012-04-26 22	2012-04-26	674.286	4.9	44	22	9	674.360	124.7	344.2	4855	0.3913
2012-07-02 00	2012-07-02	18.262	5.1	41	22	8	18.292	189.8	364.0	3624	0.5379
2012-07-29 05	2012-07-29	165.510	6.5	65	18	10	165.569	180.3	339.8	3292	0.4894
2012-10-31 23	2012-10-31	719.088	6.2	50	29	8	719.103	102.5	313.2	2172	0.6087
2012-12-29 16	2012-12-29	486.647	4.8	53	27	11	486.706	135.7	310.5	5069	0.5628
2013-01-10 17	2013-01-10	513.826	4.8	48	30	10	513.841	101.2	294.6	5918	0.5546
2013-01-16 32	2013-01-16	982.076	6.7	40	24	6	982.106	171.6	323.0	3584	0.5558
2013-02-05 23	2013-02-05	700.006	4.8	43	22	9	700.095	143.2	350.6	7356	0.3951
2013-02-20 23	2013-02-20	707.737	8.3	50	30	6	707.767	211.3	420.3	6483	0.7703
2013-02-20 24	2013-02-20	736.386	7.0	56	24	8	736.416	186.5	366.4	8853	0.5867
2013-05-17 34	2013-05-17	1031.627	6.4	45	17	7	1031.642	135.8	345.6	4406	0.4655
2013-06-01 42	2013-06-01	1261.011	5.3	58	19	11	1261.041	181.4	350.6	2298	0.4355
2013-06-02 01	2013-06-02	57.947	5.9	65	22	11	57.947	186.0	369.4	2568	0.3755
2013-06-02 05	2013-06-02	158.305	6.1	43	17	7	158.305	182.8	381.0	4897	0.4928
2013-06-02 05	2013-06-02	159.900	7.1	71	17	10	160.004	186.2	356.1	2250	0.2489
2013-06-22 22	2013-06-22	674.701	4.6	51	19	11	674.716	166.5	351.4	5972	0.4676
2013-06-22 22	2013-06-22	679.041	5.4	65	21	12	679.041	164.9	360.6	4270	0.3456
2013-06-22 23	2013-06-22	690.930	2.5	38	24	15	690.944	146.6	362.4	6758	0.5667
2013-11-21 34	2013-11-21	1024.719	6.4	70	26	11	1024.779	178.1	339.6	1199	0.5296
2013-12-11 23	2013-12-11	691.737	5.1	41	29	8	691.737	207.5	387.4	6821	0.5209
2014-05-19 28	2014-05-19	855.419	4.4	44	26	10	855.479	148.8	355.5	4151	0.6271
2014-05-22 14	2014-05-22	424.089	2.9	44	22	15	424.089	139.1	343.3	5932	0.2548
2014-06-07 14	2014-06-07	425.906	5.5	55	16	10	425.950	163.9	350.8	3305	0.4089
2014-06-07 21	2014-06-07	642.945	4.4	40	17	9	642.990	167.3	353.7	3257	0.3724
2014-09-16 13	2014-09-16	404.606	3.4	37	20	11	404.620	168.3	335.7	5189	0.5527
2015-05-06 22	2015-05-06	674.014	8.7	104	18	12	674.058	148.4	354.3	6629	0.4482

Atlas of wavelet-scalograms

All scalogram are presented as dilation no. - sample no. graphs. The dilation no. may be converted to the time scale. The absolute time of each chirp may be obtained from the above table.

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