Earthquake with magnitude of ML 1.6 on date 04-12-2021 and time 14:39:31 (UTC) in region 4 km W Gubbio (PG)

A magnitude ML 1.6 earthquake occured in region: 4 km W Gubbio (PG), on

  • 04-12-2021 14:39:31 (UTC)
  • 04-12-2021 15:39:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.345, 12.537 at 10 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
Gubbio PG 4 32216 32216
Scheggia e Pascelupo PG 13 1393 33609
Pietralunga PG 14 2111 35720
Costacciaro PG 14 1216 36936
Cantiano PU 16 2245 39181
Sigillo PG 17 2404 41585
Montone PG 17 1680 43265
Umbertide PG 17 16681 59946
Fossato di Vico PG 19 2840 62786

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NE of Perugia (166134 inhabitants)
45 Km NW of Foligno (57155 inhabitants)
55 Km E of Arezzo (99543 inhabitants)
68 Km SW of Fano (60888 inhabitants)
70 Km SW of Pesaro (94582 inhabitants)
80 Km S of Rimini (147750 inhabitants)
85 Km W of Ancona (100861 inhabitants)
88 Km N of Terni (111501 inhabitants)
91 Km S of Cesena (96758 inhabitants)
97 Km E of Siena (53903 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.6 2021-12-04
14:39:31
43.3452 12.5368 10 2021-12-04
14:53:21
Sala Sismica INGV-Roma 98132311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-04 14:39:31 ± 0.38
Latitude 43.3452 ± 0.0162
Longitude 12.5368 ± 0.0198
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98132311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2070
Semi-minor axis of confidence ellipse (meter) 1210
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 321
Circular confidence region, given by single value of horizontal uncertainty (meter) 2070
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 288
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.54859
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 98132311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-04 14:53:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESX.HHZ. 2021-12-04T14:40:39.04 3.0 undecidable manual Sg 16.610001 0
IV.SBPO.HNZ. 2021-12-04T14:40:38.80 3.0 negative manual Pg 23.75 0
IV.MSSA.HHZ. 2021-12-04T14:40:18.59 3.0 undecidable manual Pn 0.03 0
IV.RESU.HHZ. 2021-12-04T14:40:14.86 3.0 undecidable manual Sg 4.91 0
IV.VIVA.HHZ. 2021-12-04T14:40:07.65 3.0 undecidable manual Sn -0.59 0
IV.IMOL.HNZ. 2021-12-04T14:40:02.66 3.0 undecidable manual Pn 0.07 0
IV.PP3.EHZ. 2021-12-04T14:39:52.30 3.0 positive manual Pg 11.81 0
IV.MMUR.HNZ. 2021-12-04T14:39:50.28 3.0 undecidable manual Pn 5.37 0
IV.CSP1.EHZ. 2021-12-04T14:39:50.72 0.6 undecidable manual S 117 0.5486 50 0.55 43
IV.FDMO.HHZ. 2021-12-04T14:39:48.96 0.6 undecidable manual S 127 0.5063 50 0.05 49
IV.EL6.EHZ. 2021-12-04T14:39:46.27 0.6 undecidable manual S 92 0.411 50 0.18 48
IV.ASSB.HHZ. 2021-12-04T14:39:43.07 0.6 undecidable manual S 164 0.3148 50 -0.19 49
IV.SNTG.HHZ. 2021-12-04T14:39:42.39 0.6 undecidable manual S 107 0.3076 50 -0.63 44
IV.CSP1.EHZ. 2021-12-04T14:39:42.52 0.6 negative manual P 117 0.5486 50 0.36 45
IV.FDMO.HHZ. 2021-12-04T14:39:41.30 0.1 undecidable manual P 127 0.5063 50 -0.13 96
IV.LAV9.HHZ. 2021-12-04T14:39:40.78 3.0 negative manual Pg 8.64 0
IV.EL6.EHZ. 2021-12-04T14:39:39.76 1.0 undecidable manual P 92 0.411 50 -0.04 25
IV.ASSB.HHZ. 2021-12-04T14:39:38.28 0.1 positive manual P 164 0.3148 50 0.11 100
IV.SNTG.HHZ. 2021-12-04T14:39:37.91 0.1 undecidable manual P 107 0.3076 50 -0.12 100
IV.BSSO.HNZ. 2021-12-04T14:39:36.08 3.0 undecidable manual Sn -1.69 0
IV.VITU.HHZ. 2021-12-04T14:39:34.29 3.0 undecidable manual Sn 2.55 0
IV.ESCV.HHZ. 2021-12-04T14:39:24.72 3.0 positive manual Pn -2.84 0
AC.VLO.HHZ. 2021-12-04T14:39:22.21 3.0 undecidable manual Pn 0.35 0
IV.BSSO.HNZ. 2021-12-04T14:39:13.38 3.0 undecidable manual Pn -1.42 0
IX.SCL3.EHZ.02 2021-12-04T14:39:07.88 3.0 undecidable manual S -3.69 0
IX.COL3.HHZ.02 2021-12-04T14:39:02.25 3.0 positive manual Pn 0.58 0
IV.VULT.HHZ. 2021-12-04T14:39:00.51 3.0 undecidable manual P -1.09 0
IV.SPS2.HHZ. 2021-12-04T14:38:59.49 3.0 negative manual P -3.04 0
IX.SRN3.HHZ.02 2021-12-04T14:38:58.79 3.0 undecidable manual P -0.6 0
IV.TDS.HHZ. 2021-12-04T14:38:55.75 3.0 undecidable manual P -1.73 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.6 0.00018029425 0.16 AML other m 2021-12-04T14:39:43.96
IV.ASSB.HHE. ML:1.7 0.0002119313 0.1984 AML other m 2021-12-04T14:39:43.54
IV.SNTG.HHE. ML:1.5 0.0001465298 0.2368 AML other m 2021-12-04T14:39:42.69
IV.SNTG.HHN. ML:1.6 0.000174391 0.3008 AML other m 2021-12-04T14:39:42.81
IV.EL6.EHE. ML:1.6 0.000115842705 0.3584 AML other m 2021-12-04T14:39:46.99
IV.EL6.EHN. ML:1.6 0.0001046143 0.2176 AML other m 2021-12-04T14:39:46.39
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download