Open Access
Table 1
The definition and occurrence probability of IsUG derived from UQRG GIMs during the period 1997–2014 (reproduced from Liu et al. (2021)).
| IsUG | Description | Definition | Global occurrence during 1997–2014 (%) |
|---|---|---|---|
| IP3 | Severe positive storm | 5 < IsUG | 0.17 |
| IP2 | Strong positive storm | 3 < IsUG ≤ 5 | 0.72 |
| IP1 | Moderate positive storm | 1 < IsUG ≤ 3 | 12.43 |
| I0 | Quiet | −1 < IsUG ≤ 1 | 73.96 |
| IN1 | Moderate negative storm | −2 < IsUG ≤ −1 | 11.72 |
| IN2 | Strong negative storm | −3 < IsUG ≤ −2 | 0.95 |
| IN3 | Severe negative storm | IsUG < −3 | 0.06 |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.