Anticipatory infrastructures assemble sensors that are ready to detect, networks primed to share data, scientists prepared to confirm events, and news organizations poised to tell stories. This article explains how public time is articulated through sensor-mediated communications by examining two anticipatory infrastructures. Each infrastructure uses similar earthquake data to detect, report on, and convene material publics around earthquakes in Southern California. They are integral to structuring rhythms, coordinating syncronizations, setting deadlines, and making events timely, meaningful, and actionable, yet their governance lives in no one place. Instead, they emerge from an assemblage of sensors, networks, devices, algorithms, people, data, organizations, professional practices, and normative theories of the public. By comparing two different anticipatory infrastructures, we show how imagined publics, forms of journalistic storytelling, representations of earthquake events, and system maintenance can convene different public temporalities. We identify four dynamics involved in making these variable temporalities in material publics: how human-machine relations organize time, how professional norms of timeliness collide, how publics are anticipated by infrastructures, and how sensor infrastructures are maintained or decay over time.

中文翻译：

---

创造事件：预期基础设施如何产生共享的时间性

预期基础设施组装了准备检测的传感器、准备共享数据的网络、准备确认事件的科学家以及准备讲述故事的新闻机构。本文通过检查两个预期基础设施，解释了如何通过传感器介导的通信来表达公共时间。每个基础设施都使用类似的地震数据来检测、报告和召集有关南加州地震的重要公众。它们对于构建节奏、协调同步、设定最后期限以及使事件变得及时、有意义和可操作是不可或缺的，但它们的治理并不存在于任何地方。相反，它们来自传感器、网络、设备、算法、人员、数据、组织、专业实践和公众规范理论的集合。通过比较两种不同的预期基础设施，我们展示了想象的公众、新闻叙事的形式、地震事件的表现以及系统维护如何召集不同的公共时间。我们确定了在物质公众中制造这些可变时间性所涉及的四种动力：人机关系如何组织时间、及时性的专业规范如何冲突、基础设施如何预期公众以及传感器基础设施如何随着时间的推移而维护或衰退。