10:45 AM - 12:15 PM
[SSS11-P05] Public awareness survey on the recognition and response behavior of the alert warning of the potential for follow-up earthquakes
Keywords:the alert warning for follow-up earthquakes, accuracy, response behavior
A public awareness survey was conducted on the awareness and response behavior of the alert warning of the potential for follow-up earthquakes in Hokkaido and Sanriku-oki region, which became effective on December 16, 2022. The survey was conducted in January 2023, and responses were sought from adults living in six areas in Hokkaido (Sapporo, Asahikawa, Hakodate, Tomakomai, Obihiro, and Kushiro) who had registered with an Internet survey company. A total of 1,800 respondents (300 males and 150 females) were surveyed in each metropolitan area.
Regarding the level of awareness of the information, 33.1% of the respondents answered "I do not know," 32.4% answered "I have heard of it but do not know what kind of information it is," 21.9% answered "I have heard about it through TV programs," and 12.6% answered "I am familiar with it through the Internet. The level of awareness of this information is low at this point in time.
Next, respondents were asked whether or not they would take the seven typical response actions if they knew the probability of a major earthquake occurring within one week after the alert warning for follow-up earthquakes was issued, with several assumed probabilities.
First, under the condition of "50% probability of a major earthquake," 60.6% of the respondents selected "discuss with family what to do in case of an earthquake," 64.3% selected "check emergency supplies," and 61.7% selected "stock up on food and fuel. Sleeping in a safe place inside the home" was selected by 36.2% of the respondents. Compared to these, 19.1% of the respondents chose "go to a local shelter," 7.9% "take shelter at a relative or friend's house nearby," and 11.8% "take a day off from work or school," indicating a tendency for fewer respondents to take actions that would have a large social impact.
Under the condition of "1% probability of a major earthquake," which is closer to the actual operation of the alert warning, 24.9% of the respondents said they would "discuss with family what to do in case of an earthquake," 21.4% would "check emergency supplies," 14.7% would "stock up on food and fuel," and 10.4% would "sleep in a safe place inside your home. The implementation rates of even less burdensome actions, which are assumed to be a reconfirmation of usual earthquake countermeasures, dropped significantly. The socially significant "go to a local evacuation center" (2.7%), "evacuate to a relative or friend's house nearby" (1.4%), and "take a day off from work or school" (1.7%) showed large decreases, but it is noteworthy that the numbers are not so small that they can be ignored. This suggests that there are citizens who choose to take actions that are burdensome even if the probability is low, and if there are people close to them who take such actions, the influence may spread to those around them.
In order to make use of earthquake prediction information, it is necessary to determine response actions in consideration of not only the earthquake prediction rate but also the accuracy of the information. In this survey, many respondents did not respond to earthquake information if the accuracy rate was expected to be low, even if the loss would be small even if the information was struck out. In order to make effective use of late-breaking earthquake information, it is necessary to establish a system that recommends actions with high disaster mitigation effect and low burden of response actions.
Regarding the level of awareness of the information, 33.1% of the respondents answered "I do not know," 32.4% answered "I have heard of it but do not know what kind of information it is," 21.9% answered "I have heard about it through TV programs," and 12.6% answered "I am familiar with it through the Internet. The level of awareness of this information is low at this point in time.
Next, respondents were asked whether or not they would take the seven typical response actions if they knew the probability of a major earthquake occurring within one week after the alert warning for follow-up earthquakes was issued, with several assumed probabilities.
First, under the condition of "50% probability of a major earthquake," 60.6% of the respondents selected "discuss with family what to do in case of an earthquake," 64.3% selected "check emergency supplies," and 61.7% selected "stock up on food and fuel. Sleeping in a safe place inside the home" was selected by 36.2% of the respondents. Compared to these, 19.1% of the respondents chose "go to a local shelter," 7.9% "take shelter at a relative or friend's house nearby," and 11.8% "take a day off from work or school," indicating a tendency for fewer respondents to take actions that would have a large social impact.
Under the condition of "1% probability of a major earthquake," which is closer to the actual operation of the alert warning, 24.9% of the respondents said they would "discuss with family what to do in case of an earthquake," 21.4% would "check emergency supplies," 14.7% would "stock up on food and fuel," and 10.4% would "sleep in a safe place inside your home. The implementation rates of even less burdensome actions, which are assumed to be a reconfirmation of usual earthquake countermeasures, dropped significantly. The socially significant "go to a local evacuation center" (2.7%), "evacuate to a relative or friend's house nearby" (1.4%), and "take a day off from work or school" (1.7%) showed large decreases, but it is noteworthy that the numbers are not so small that they can be ignored. This suggests that there are citizens who choose to take actions that are burdensome even if the probability is low, and if there are people close to them who take such actions, the influence may spread to those around them.
In order to make use of earthquake prediction information, it is necessary to determine response actions in consideration of not only the earthquake prediction rate but also the accuracy of the information. In this survey, many respondents did not respond to earthquake information if the accuracy rate was expected to be low, even if the loss would be small even if the information was struck out. In order to make effective use of late-breaking earthquake information, it is necessary to establish a system that recommends actions with high disaster mitigation effect and low burden of response actions.