Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 29-12-2021 and time 09:26:28 (Italy) in region 4 km NW Apecchio (PU)

A magnitude ML 0.5 earthquake occured in region: 4 km NW Apecchio (PU), on

  • 29-12-2021 08:26:28 (UTC)
  • 29-12-2021 09:26:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5920, 12.3900 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.

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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 4 1882 1882
Mercatello sul Metauro PU 8 1378 3260
Sant'Angelo in Vado PU 8 4133 7393
Piobbico PU 10 2029 9422
Borgo Pace PU 11 606 10028
Urbania PU 14 7099 17127
Belforte all'Isauro PU 14 769 17896
Peglio PU 15 696 18592
Piandimeleto PU 15 2167 20759
Sestino AR 15 1355 22114
Lunano PU 16 1527 23641
Pietralunga PG 17 2111 25752
San Giustino PG 18 11297 37049
Città di Castello PG 19 39913 76962
Frontino PU 19 293 77255

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Arezzo (99543 inhabitants)
54 Km N of Perugia (166134 inhabitants)
54 Km S of Rimini (147750 inhabitants)
55 Km SW of Pesaro (94582 inhabitants)
58 Km W of Fano (60888 inhabitants)
62 Km S of Cesena (96758 inhabitants)
75 Km NW of Foligno (57155 inhabitants)
76 Km SE of Forlì (117913 inhabitants)
87 Km SE of Faenza (58541 inhabitants)
91 Km E of Siena (53903 inhabitants)
91 Km W of Ancona (100861 inhabitants)
93 Km S of Ravenna (159116 inhabitants)
93 Km E of Firenze (382808 inhabitants)
99 Km E of Scandicci (50609 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.5 2021-12-29
08:26:28		 43.5922 12.3903 10 2021-12-29
08:45:25		 Sala Sismica INGV-Roma 99105311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-29 08:26:28 ± 0.1
Latitude 43.5922 ± 0.0063
Longitude 12.3903 ± 0.0062
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 99105311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 743
Semi-minor axis of confidence ellipse (meter) 390
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 22
Circular confidence region, given by single value of horizontal uncertainty (meter) 740.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 181
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27249
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 99105311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-29 08:45:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ORI.HHZ. 2021-12-29T08:28:26.26 3.0 undecidable manual Sn 0.57 0
CR.STON.BHZ. 2021-12-29T08:28:12.92 3.0 undecidable manual Sn 3.59 0
IV.EUCT.HNZ. 2021-12-29T08:27:54.56 3.0 undecidable manual Sg 16.469999 0
IV.IST3.HHZ. 2021-12-29T08:27:52.68 3.0 positive manual Pg 12.86 0
IV.TDS.HHZ. 2021-12-29T08:27:48.87 3.0 undecidable manual Pg 13.23 0
IV.STAL.HHZ. 2021-12-29T08:27:33.64 3.0 undecidable manual Sn -3.06 0
CH.BERNI.HHZ. 2021-12-29T08:27:21.51 3.0 undecidable manual Pg 9.4 0
CR.ZAG.BHZ. 2021-12-29T08:27:20.08 3.0 undecidable manual Pn 4.69 0
IT.ORP.HGZ. 2021-12-29T08:27:15.89 3.0 negative manual Pg 4.52 0
IV.STAL.HHZ. 2021-12-29T08:27:07.46 3.0 positive manual Pg 2.79 0
IV.SARZ.HHZ. 2021-12-29T08:27:04.10 3.0 undecidable manual Pn -0.81 0
IV.LRP.EHZ. 2021-12-29T08:27:00.30 3.0 positive manual Pg 3.14 0
IV.LAV9.HHZ. 2021-12-29T08:26:52.75 3.0 positive manual Pn -1.13 0
IV.NDIM.HNZ. 2021-12-29T08:26:50.84 3.0 negative manual Pn 0.84 0
IV.MNTT.EHZ. 2021-12-29T08:26:42.87 3.0 negative manual Pg 0.07 0
IV.IMOL.HNZ. 2021-12-29T08:26:41.03 3.0 undecidable manual Pg 1.39 0
IV.ATSC.EHN. 2021-12-29T08:26:39.09 0.6 undecidable manual S 128 30.2475 50 0.32 47
IV.TB01.DHZ.01 2021-12-29T08:26:36.98 0.3 undecidable manual S 171 23.6541 50 -0.03 75
IV.ATPC.HNZ. 2021-12-29T08:26:34.16 0.6 undecidable manual S 157 13.4754 128 0.15 50
IV.BADI.EHZ. 2021-12-29T08:26:34.18 0.6 undecidable manual S 232 14.874 125 -0.22 49
IV.PARC.HHZ. 2021-12-29T08:26:34.03 0.6 undecidable manual S 297 13.6752 127 -0.04 51
IV.ATSC.EHN. 2021-12-29T08:26:33.89 0.1 undecidable manual P 128 30.2475 50 -0.37 93
IV.PIEI.HHZ. 2021-12-29T08:26:33.82 0.6 undecidable manual S 118 13.1757 128 -0.11 50
IV.TB01.DHZ.01 2021-12-29T08:26:33.31 0.1 undecidable manual P 171 23.6541 50 0.07 100
IV.BADI.EHZ. 2021-12-29T08:26:31.78 0.6 undecidable manual P 232 14.874 125 0.05 51
IV.APEC.HHZ. 2021-12-29T08:26:31.88 0.6 undecidable manual S 148 4.3956 157 -0.14 51
IV.PARC.HHZ. 2021-12-29T08:26:31.81 0.6 negative manual P 297 13.6752 127 0.27 49
IV.ATPC.HNZ. 2021-12-29T08:26:31.64 0.1 undecidable manual P 157 13.4754 128 0.13 100
IV.PIEI.HHZ. 2021-12-29T08:26:31.48 0.3 undecidable manual P 118 13.1757 128 0.02 77
IV.APEC.HHZ. 2021-12-29T08:26:30.44 1.0 undecidable manual P 148 4.3956 157 0.08 26
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APEC.HHE. ML:0.9 0.000121321 0.2176 AML other m 2021-12-29T08:26:32.56
IV.APEC.HHN. ML:0.5 0.000057284815000000005 0.16 AML other m 2021-12-29T08:26:31.97
IV.PIEI.HHE. ML:0.5 0.000030259870000000003 0.1152 AML other m 2021-12-29T08:26:33.86
IV.PIEI.HHN. ML:0.0 0.00001246132 0.2816 AML other m 2021-12-29T08:26:35.91
IV.BADI.EHE. ML:0.7 0.000045068854999999995 0.0832 AML other m 2021-12-29T08:26:34.30
IV.BADI.EHN. ML:0.7 0.00004378135 3.8976 AML other m 2021-12-29T08:26:35.29
IV.PARC.HHE. ML:0.2 0.000012854139 0.2176 AML other m 2021-12-29T08:26:34.18
IV.PARC.HHN. ML:0.2 0.000015959252 0.1792 AML other m 2021-12-29T08:26:34.18
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