ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.1 on date 25-12-2018 and time 01:05:27 (UTC) in region 7 km W Apecchio (PU)

A magnitude ML 1.1 earthquake occured in region: 7 km W Apecchio (PU), on

  • 25-12-2018 01:05:27 (UTC)
  • 25-12-2018 02:05:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.58, 12.34 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Apecchio PU 7 1882 1882
Mercatello sul Metauro PU 8 1378 3260
Borgo Pace PU 10 606 3866
Sant'Angelo in Vado PU 12 4133 7999
San Giustino PG 13 11297 19296
Piobbico PU 14 2029 21325
Sestino AR 15 1355 22680
Città di Castello PG 16 39913 62593
Sansepolcro AR 16 15884 78477
Belforte all'Isauro PU 16 769 79246
Pietralunga PG 17 2111 81357
Piandimeleto PU 18 2167 83524
Urbania PU 18 7099 90623
Peglio PU 18 696 91319
Badia Tedalda AR 19 1087 92406
Lunano PU 19 1527 93933
Citerna PG 20 3531 97464

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Arezzo (99543 inhabitants)
52 Km N of Perugia (166134 inhabitants)
57 Km SW of Rimini (147750 inhabitants)
59 Km SW of Pesaro (94582 inhabitants)
62 Km W of Fano (60888 inhabitants)
63 Km S of Cesena (96758 inhabitants)
75 Km NW of Foligno (57155 inhabitants)
76 Km SE of Forlì (117913 inhabitants)
86 Km E of Siena (53903 inhabitants)
87 Km SE of Faenza (58541 inhabitants)
90 Km E of Firenze (382808 inhabitants)
94 Km S of Ravenna (159116 inhabitants)
95 Km W of Ancona (100861 inhabitants)
95 Km E of Scandicci (50609 inhabitants)
100 Km SE of Imola (69797 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.1 2018-12-25
01:05:27
43.58 12.34 9 2018-12-25
01:59:25
Sala Sismica INGV-Roma 64199091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-25 01:05:27 ± 0.1
Latitude 43.58 ± 0.00
Longitude 12.34 ± 0.00
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 64199091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 240
Semi-minor axis of confidence ellipse (meter) 33
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 193
Circular confidence region, given by single value of horizontal uncertainty (meter) 240
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.06115
Epicentral distance of station farthest from the epicenter (degree) 0.20055
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 64199091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-25 01:59:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATVO.HHZ. 2018-12-25T01:05:36.49 0.3 undecidable manual S 166 0.2005 113 0.13 71
IV.PE3.EHZ. 2018-12-25T01:05:35.30 0.3 undecidable manual S 44 0.1646 117 0.21 71
IV.PIEI.HHZ. 2018-12-25T01:05:34.40 0.3 undecidable manual S 106 0.1484 120 -0.12 72
IV.PARC.HHZ. 2018-12-25T01:05:33.14 0.3 undecidable manual S 315 0.1016 130 0.08 73
IV.BADI.EHZ. 2018-12-25T01:05:32.82 0.3 undecidable manual S 226 0.0962 131 -0.07 74
IV.PE3.EHZ. 2018-12-25T01:05:32.04 0.1 undecidable manual P 44 0.1646 117 -0.04 98
IV.ATVO.HHZ. 2018-12-25T01:05:32.89 0.1 undecidable manual P 166 0.2005 113 0.08 96
IV.PIEI.HHZ. 2018-12-25T01:05:31.63 0.1 undecidable manual P 106 0.1484 120 -0.12 96
IV.APEC.HHZ. 2018-12-25T01:05:31.97 0.3 undecidable manual S 108 0.0612 144 -0.02 75
IV.APEC.HHZ. 2018-12-25T01:05:30.30 0.1 undecidable manual P 108 0.0612 144 0.01 100
IV.BADI.EHZ. 2018-12-25T01:05:30.85 0.1 undecidable manual P 226 0.0962 131 0.04 99
IV.PARC.HHZ. 2018-12-25T01:05:30.77 0.1 undecidable manual P 315 0.1016 130 -0.14 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APEC.HHN. ML:1.1 0.00021 0.36 AML other m 2018-12-25T01:05:32.64
IV.APEC.HHE. ML:1.2 0.0002775 0.2 AML other m 2018-12-25T01:05:32.74
IV.BADI.EHE. ML:1.4 0.0003375 0.4 AML other m 2018-12-25T01:05:33.24
IV.BADI.EHN. ML:1.4 0.0002855 0.1 AML other m 2018-12-25T01:05:33.28
IV.PARC.HHN. ML:0.8 7.125E-5 0.3 AML other m 2018-12-25T01:05:34.17
IV.PARC.HHE. ML:0.7 6.725E-5 0.44 AML other m 2018-12-25T01:05:36.98
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download