INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.5 on date 03-12-2018 and time 21:33:01 (Italy) in region 8 km NW Valfabbrica (PG)

A magnitude ML 0.5 earthquake occured in region: 8 km NW Valfabbrica (PG), on

  • 03-12-2018 20:33:01 (UTC)
  • 03-12-2018 21:33:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.22, 12.56 at 11 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
Valfabbrica PG 8 3389 3389
Gubbio PG 15 32216 35605
Bastia Umbra PG 17 21874 57479
Assisi PG 18 28299 85778
Fossato di Vico PG 18 2840 88618
Gualdo Tadino PG 18 15208 103826
Perugia PG 19 166134 269960
Sigillo PG 19 2404 272364
Costacciaro PG 20 1216 273580

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NE of Perugia (166134 inhabitants)
32 Km NW of Foligno (57155 inhabitants)
61 Km E of Arezzo (99543 inhabitants)
74 Km N of Terni (111501 inhabitants)
78 Km SW of Fano (60888 inhabitants)
82 Km SW of Pesaro (94582 inhabitants)
89 Km W of Ancona (100861 inhabitants)
93 Km S of Rimini (147750 inhabitants)
97 Km NE of Viterbo (67173 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 0.5 2018-12-03
20:33:01
43.22 12.56 11 2018-12-03
20:38:34
Sala Sismica INGV-Roma 63621051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-03 20:33:01 ± 0.06
Latitude 43.22 ± 0.00
Longitude 12.56 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63621051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 430
Semi-minor axis of confidence ellipse (meter) 400
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 242
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.04587
Epicentral distance of station farthest from the epicenter (degree) 0.31206
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 63621051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-03 20:38:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2018-12-03T20:33:13.06 0.6 undecidable manual S 357 0.3121 50 0.16 47
IV.ATPI.EHZ. 2018-12-03T20:33:11.30 0.6 undecidable manual S 333 0.2536 50 0.12 47
IV.SSFR.HHZ. 2018-12-03T20:33:11.78 0.6 undecidable manual S 37 0.2671 50 0.19 47
IV.ASSB.HHZ. 2018-12-03T20:33:09.42 0.6 undecidable manual S 158 0.1961 50 -0.05 49
IV.ATVO.HHZ. 2018-12-03T20:33:09.18 0.6 undecidable manual S 325 0.1925 50 -0.2 47
IV.FOSV.EHZ. 2018-12-03T20:33:08.49 0.6 undecidable manual S 64 0.1637 121 0.03 49
IV.PIEI.HHZ. 2018-12-03T20:33:08.38 1.0 undecidable manual P 357 0.3121 50 0.45 22
IV.ATTE.HHZ. 2018-12-03T20:33:07.95 0.6 undecidable manual S 260 0.1511 123 -0.11 48
IV.ATPI.EHZ. 2018-12-03T20:33:07.07 1.0 negative manual P 333 0.2536 50 0.14 24
IV.SSFR.HHZ. 2018-12-03T20:33:06.73 0.1 undecidable manual P 37 0.2671 50 -0.45 88
IV.ASSB.HHZ. 2018-12-03T20:33:06.02 0.1 undecidable manual P 158 0.1961 50 0.07 97
IV.MURB.HHZ. 2018-12-03T20:33:05.14 0.6 undecidable manual S 328 0.0459 155 -0.13 49
IV.ATVO.HHZ. 2018-12-03T20:33:05.89 0.3 negative manual P 325 0.1925 50 -0.01 74
IV.ATTE.HHZ. 2018-12-03T20:33:05.32 0.6 undecidable manual P 260 0.1511 123 0.18 48
IV.FOSV.EHZ. 2018-12-03T20:33:05.62 1.0 negative manual P 64 0.1637 121 0.25 23
IV.MURB.HHZ. 2018-12-03T20:33:03.58 0.1 negative manual P 328 0.0459 155 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:0.7 3.615E-5 1.02 AML other m 2018-12-03T20:33:10.24
IV.MURB.HHE. ML:1.4 0.0004025 1.12 AML other m 2018-12-03T20:33:06.72
IV.MURB.HHN. ML:1.4 0.0004355 0.22 AML other m 2018-12-03T20:33:05.27
IV.ATTE.HHN. ML:0.4 2.06608895E-5 0.2048 AML other m 2018-12-03T20:33:08.12
IV.ATTE.HHE. ML:0.4 1.758196E-5 0.1792 AML other m 2018-12-03T20:33:08.12
IV.FOSV.EHE. ML:0.3 1.430137E-5 0.8576 AML other m 2018-12-03T20:33:09.24
IV.FOSV.EHN. ML:0.1 9.235766E-6 0.256 AML other m 2018-12-03T20:33:09.03
IV.ATVO.HHE. ML:0.7 3.352103E-5 0.0768 AML other m 2018-12-03T20:33:09.70
IV.ATVO.HHN. ML:0.6 2.5147665E-5 0.32 AML other m 2018-12-03T20:33:09.52
IV.ASSB.HHN. ML:0.6 2.425439E-5 0.3328 AML other m 2018-12-03T20:33:09.91
IV.ATPI.EHN. ML:0 2.779349E-6 0.1664 AML other m 2018-12-03T20:33:11.34
IV.ATPI.EHE. ML:0.6 1.93874E-5 0.4224 AML other m 2018-12-03T20:33:12.35
IV.PIEI.HHE. ML:0.7 1.815934E-5 0.1536 AML other m 2018-12-03T20:33:14.27
IV.PIEI.HHN. ML:0.4 9.5557505E-6 0.1024 AML other m 2018-12-03T20:33:14.34
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