Table 5

Hourly average storm intensities Dⁱ, equation (5), calculated using the four standard observatories, Hermanus (HER), Kakioka (KAK), Honolulu (HON), and San Juan (SJG); local 1-min-resolution intensities, sampled as at Colaba, ${}_{\mathit{C}}{}^{}{\mathit{d}}_{\mathit{n}}^{\mathit{i}}$ , equation (12), for Alibag (ABG) and HER, KAK, HON, SJG for selected storms, 1989–2015. Month (Mn), Day (Dy), Hour (Hr, UT), Minute (Mi, UT). Bold data are shown in Figure 5.

Year	Mn	Dy	Hr	Di (nT)	Mn	Dy	Hr	Mi	${}_{\mathit{C}}{}^{}{\mathit{d}}_{\mathbf{ABG}}^{\mathit{i}}$ (nT)	Mn	Dy	Hr	Mi	${}_{\mathit{C}}{}^{}{\mathit{d}}_{\mathbf{HER}}^{\mathit{i}}$ (nT)	Mn	Dy	Hr	Mi	${}_{\mathit{C}}{}^{}{\mathit{d}}_{\mathbf{KAK}}^{\mathit{i}}$ (nT)	Mn	Dy	Hr	Mi	${}_{\mathit{C}}{}^{}{\mathit{d}}_{\mathbf{HON}}^{\mathit{i}}$ (nT)	Mn	Dy	Hr	Mi	${}_{\mathit{C}}{}^{}{\mathit{d}}_{\mathbf{SJG}}^{\mathit{i}}$ (nT)
1989	03	14	01	593						03	14	01	37	663	03	14	01	37	663	03	14	00	27	580
1991	11	09	01	379						11	08	22	42	356	11	09	00	42	320	11	09	02	27	357	11	09	00	47	448
1991	03	25	00	295						03	25	00	47	277	03	25	03	42	315	03	25	03	42	314	03	25	03	42	324
1990	04	10	15	291						04	10	16	32	340	04	10	14	52	337	04	10	15	27	200	04	10	18	17	282
1992	05	10	14	284						05	10	15	22	341	05	10	11	57	342	05	10	12	22	262	05	10	15	07	288
1991	10	29	08	279						10	28	15	52	239	10	28	15	47	276	10	29	07	27	251
2003	11	20	20	427	11	20	19	12	690	11	20	21	07	433	11	20	19	52	468						11	20	19	12	551
2003	10	30	22	384	10	30	21	57	405	10	29	07	02	465	10	30	02	22	363	10	30	02	02	418	10	30	22	32	489
2001	03	31	08	382	03	31	08	12	372	03	31	19	12	332	03	31	08	37	407	03	31	08	07	459	03	31	20	52	325
2004	11	08	06	371	11	10	09	42	385	11	08	08	37	395	11	08	05	52	437	11	08	05	27	487	11	09	20	42	339
2000	07	16	00	301	07	15	21	57	385	07	15	22	12	337	07	16	01	42	262	07	15	20	57	289	07	15	22	32	374
2000	04	06	22	297	04	07	00	27	337	04	06	22	42	357	04	07	00	27	298	04	07	12	07	146	04	07	06	57	186
2015	03	17	22	232	03	17	16	42	273	03	17	16	57	252	03	17	17	32	185	03	17	23	47	232	03	17	23	17	295
2015	06	23	04	195	06	23	04	47	222	06	22	20	12	248	06	23	04	42	223	06	23	04	42	258	06	23	03	12	164
2015	12	20	22	164	12	20	18	22	190	12	20	18	47	192	12	21	00	02	146	12	21	02	37	168	12	20	22	47	209
2012	03	09	08	141	03	09	12	12	180	03	09	15	17	152	03	09	07	42	187	03	09	08	37	150	03	09	15	22	111
2012	07	15	16	141	07	15	16	12	176	07	15	18	27	184	07	15	09	02	158	07	15	09	07	142	07	15	21	47	166
2011	10	25	01	140	10	25	01	20	130	10	25	01	32	107	10	25	06	12	133	10	25	03	47	154	10	25	01	17	206