February 17th, 2016
In 1880-1881, a lava flow from Mauna Loa came very close to entering Hilo Bay. In trying to reconstruct the timeline of this flow for a recent Volcano Awareness Month presentation, the Hawaiian Volcano Observatory tracked down many old place names mentioned in newspaper reports of the lava’s progress. One such name that came up repeatedly is Kalanakamaa gulch (“Kahawai o Kalanakamaa”).
The first place researchers saw this name is the 1870's description of the boundary between the ahupuaʻa of Waiākea and Kūkūau The boundary goes mauka (inland) from the shoreline through several points within the Waiolama fishponds (area of today’s Hilo Bayfront soccer fields) to Kumu spring (just north of the downtown Longs Drugs). From there it continues upslope to Kalanakamaa across what is now Kīlauea Avenue. The record of this boundary was based on testimony by several kama‘āina (native-born residents) from the area.
In 1881, Joseph Nāwahī, a well-known Hilo lawyer, painter, and politician, wrote letters about the Mauna Loa flow to Hawaiian language newspapers. As the flow neared Hilo in June 1881, he described the lava descending into the Kaūmana stream and forecast that it would arrive on the Kalanakamaa gulch adjacent to Kūkūau Street in Hilo.
The Kalanakamaa place name appears several times in 1881, mostly in Hawaiian-language newspaper accounts of the Mauna Loa eruption. By the end of July, the lava flow was reported to be in Kalanakamaa gulch before it stalled in early August 1881.
The next time this place name is mentioned in detail is in testimony recorded by the Boundary Commission in 1900. The exact location of the boundary between the ahupuaʻa of Waiākea and Kūkūau was being disputed, and lawyers for both sides needed to clearly define each point in its description.
A typical example of a kama‘āina description of the boundary went like this: “… thence to Kumu, on the banks of the Waialama [Waiolama] river thence to Kalanakama [Kalanakamaa ]where the Government road to the volcano runs through the land thence to Huia ….”
One of the main questions the lawyers asked each witness was for the definition of Kalanakamaa. Was it a rock, a tree, a pile of rocks, a gulch?
The name literally means “remove sandals or shoes,” but many witnesses identified Kalanakamaa as a specific breadfruit tree at the intersection of a big gulch and the road to Volcano. Apparently, Hawaiians travelling from Puna to Hilo on this road wore ti-leaf sandals over the rough lava of Waiākea, but took them off and hung them in the breadfruit tree before going on to the soft ashy soil of Hilo.
It became apparent during the research that the Kalanakamaa name also applied to the adjacent gulch, which carried water when it rained, sometimes overflowing its banks. A bridge was built over the gulch prior to 1881, but it had washed away. All witnesses who described seeing water in the gulch said that it went dry after the “flow of ’81.”
An unnamed gulch in the area described by kama‘āina is shown on a map from the 1870s (available from Hawaii State Land Survey archives). In a 1954 aerial photo, a gulch in this same area is visible about 100 yards north of and parallel to Hualālai Street, from Kīlauea Avenue to the Police Department on Kapi‘olani Street. Researchers interpret these features to be the Kalanakamaa gulch. Dry since 1881 and largely filled in by subsequent construction, the gulch no longer exists.
From the research, scientists say it’s clear the 1880–1881 Mauna Loa lava flow significantly changed the way streams drained into Hilo Bay. Lava flowed down stream channels, filling some and diverting water into others, such as ‘Alenaio to the north of Kalanakamaa and Waiākea to the south.
This has happened repeatedly in the Hilo area. For example, there’s evidence of filling and diversion by lava flows along the Wailuku River, where the Boiling Pots area shows the remains of two such lava fillings in the past 10,000 years.
It’s not surprising if you’ve never heard of Kalanakamaa gulch. On a volcanic island such as ours, rivers and streams are temporary features that often change or vanish as lava flows alter the landscape.
Volcano Activity Updates
Kīlauea continues to erupt at its summit and East Rift Zone. During early February, the summit lava lake level was relatively stable, varying between about 36 and 38 m (118–125 ft) below the vent rim within Halema‘uma‘u Crater. On the East Rift Zone, scattered lava flow activity remains within about 6 km (4 mi) of Puʻu ʻŌʻō, and is not currently threatening nearby communities.
Mauna Loa is not erupting. Seismicity remains elevated above long-term background levels. Continuously recording GPS instruments show deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone of Mauna Loa, with inflation recently occurring mainly in the southwestern part of the magma storage complex.
Visit the HVO website (http://hvo.wr.usgs.gov) for past Volcano Watch articles, Kīlauea daily eruption updates, Mauna Loa weekly updates, volcano photos, recent earthquakes info, and more; call for summary updates at 808-967-8862 (Kīlauea) or 808-967-8866 (Mauna Loa); email questions to askHVO@usgs.gov.