Location:
7 km SW of Volcano, Hawaii
Period:
13 Dec 2024 21:43:14 - 21 Dec 2024 06:28:46 (7 days 8 hours 45 minutes)
Volcanoes in 100km radius:
Kilauea(13km), Mauna Loa(45km), Kama'ehuakanaloa(46km), Mauna Kea(61km), Hualalai(81km)
Earthquakes:
90
Seismic Activity Report: VS20241214.1 Swarm Analysis
A new seismic swarm, designated VS20241214.1, initiated at 21:43 HST on December 13, 2024. The epicenter is located approximately 7 kilometers southwest of Volcano, Hawaii. Within the first 22 hours and 16 minutes of the event, seismic monitoring networks recorded 24 discrete earthquake events. This activity occurs within the highly dynamic tectonic and volcanic framework of the Island of Hawaii.
Geological Context and Regional Seismicity
The Island of Hawaii is characterized by continuous volcanic and seismic activity driven by the Hawaiian hotspot. The region southwest of the town of Volcano sits near the boundary of the Kilauea and Mauna Loa volcanic systems. Seismic swarms in this area are generally attributed to magmatic migration, the adjustment of the volcanic edifice under gravitational stress, or the movement of the island’s southern flank along the decollement—a weak layer located at the interface between the volcanic pile and the underlying oceanic crust.
Since January 1, 2000, the region has experienced 82 distinct seismic swarms. Historical data indicates a fluctuating frequency of these events, with a notable uptick in activity observed in recent years. Specifically, 2023 recorded a peak of 16 swarms, while 2024 has seen 9 confirmed swarms to date. The long-term statistical record highlights the recurring nature of these phenomena, which are fundamental to the island's ongoing growth and structural evolution.
The broader seismic catalog for this region since 2000 confirms that the vast majority of events are low-to-moderate in intensity. Monitoring data shows 86,353 earthquakes with magnitudes below 5.0, reflecting the constant, low-level stress release common to active volcanic environments. In contrast, larger events are significantly rarer; only 64 earthquakes in the magnitude range of 5.0 to 5.9 have been documented during the same period. This distribution is consistent with the tectonic behavior of the Hawaiian Ridge, where frequent small-magnitude earthquakes accommodate the steady deformation of the island.
Analysis of Swarm VS20241214.1
The current swarm, VS20241214.1, aligns with the established historical frequency of seismic clustering in the South Hawaii region. While the rate of 24 events in roughly 22 hours is notable, it remains within the expected parameters for localized volcanic unrest. Geologists monitor such swarms closely for changes in hypocentral depth and migration patterns, which can serve as indicators of subsurface magma movement.
The proximity of this swarm to the Volcano area necessitates ongoing vigilance. The interaction between Kilauea’s rift zones and the structural instability of the southern flank remains the primary driver of regional seismicity. As the island continues to deform, the accumulation and release of strain will continue to manifest as swarms of this nature. Current observations suggest that VS20241214.1 is a localized adjustment, consistent with the long-term seismic behavior observed over the past two decades. Residents and stakeholders are advised to remain informed through official updates from the Hawaiian Volcano Observatory, which provides real-time analysis of these evolving geological processes. The data provided underscores the necessity of continuous, high-resolution seismic monitoring to distinguish between routine tectonic adjustments and precursors to more significant volcanic activity.