Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 26-12-2019 and time 09:31:40 (UTC) in region 6 km SE Pietralunga (PG)

A magnitude ML 1.0 earthquake occured in region: 6 km SE Pietralunga (PG), on

  • 26-12-2019 09:31:40 (UTC)
  • 26-12-2019 10:31:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3960, 12.4840 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Pietralunga PG 6 2111 2111
Gubbio PG 9 32216 34327
Montone PG 13 1680 36007
Cantiano PU 15 2245 38252
Scheggia e Pascelupo PG 15 1393 39645
Umbertide PG 16 16681 56326
Apecchio PU 19 1882 58208
Costacciaro PG 19 1216 59424

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km N of Perugia (166134 inhabitants)
49 Km E of Arezzo (99543 inhabitants)
52 Km NW of Foligno (57155 inhabitants)
66 Km SW of Fano (60888 inhabitants)
67 Km SW of Pesaro (94582 inhabitants)
74 Km S of Rimini (147750 inhabitants)
85 Km S of Cesena (96758 inhabitants)
87 Km W of Ancona (100861 inhabitants)
93 Km E of Siena (53903 inhabitants)
94 Km N of Terni (111501 inhabitants)
99 Km SE of Forlì (117913 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
Bulletin
Rev1000 		ML 1.0 2019-12-26
09:31:40		 43.3962 12.4837 8 2020-02-28
16:42:25		 Bollettino Sismico Italiano INGV 76594551
Reviewed
Rev100 		ML 1.0 2019-12-26
09:31:40		 43.3937 12.4427 11 2019-12-26
09:37:25		 Sala Sismica INGV-Roma 74989611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-26 09:31:40 ± 0.16
Latitude 43.3962 ± 0.0036
Longitude 12.4837 ± 0.0136
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76594551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1043
Semi-minor axis of confidence ellipse (meter) 490
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 275
Circular confidence region, given by single value of horizontal uncertainty (meter) 1040.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34714
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 76594551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-17 11:08:50

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 74989611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-26 09:37:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CORL.HHZ. 2019-12-26T09:33:15.47 3.0 negative manual Pg 18.379999 0
IV.VARE.HHZ. 2019-12-26T09:33:14.02 3.0 undecidable manual Sn 2.91 0
IV.EUCT.HNZ. 2019-12-26T09:32:55.91 3.0 undecidable manual Sn 0.28 0
IV.FVI.HHZ. 2019-12-26T09:32:35.05 3.0 undecidable manual Pg 8.64 0
IV.SRES.HHZ. 2019-12-26T09:32:11.67 3.0 undecidable manual Sn -0.56 0
IV.BDI.HHZ. 2019-12-26T09:32:00.63 3.0 undecidable manual Pg -0.01 0
IV.NARO.HHZ. 2019-12-26T09:31:49.71 0.3 undecidable manual S 18 25.0527 107 -0.39 68
IV.ARVD.HHZ. 2019-12-26T09:31:48.98 0.1 undecidable manual P 73 38.5281 50 0.2 92
IV.PIEI.HHZ. 2019-12-26T09:31:47.59 0.3 undecidable manual S 15 16.0728 116 0.41 69
IV.MURB.HHZ. 2019-12-26T09:31:46.92 0.1 undecidable manual S 167 15.1737 117 0.03 99
IV.NARO.HHZ. 2019-12-26T09:31:45.79 0.1 undecidable manual P 18 25.0527 107 -0.46 89
IV.ATLO.EHZ. 2019-12-26T09:31:45.81 0.3 undecidable manual S 215 10.878 126 0.17 73
IV.ATPC.HHZ. 2019-12-26T09:31:45.72 0.6 undecidable manual S 347 9.5793 129 0.43 46
IV.MURB.HHZ. 2019-12-26T09:31:44.29 0.1 undecidable manual P 167 15.1737 117 -0.11 98
IV.PIEI.HHZ. 2019-12-26T09:31:44.61 0.1 undecidable manual P 15 16.0728 116 0.05 99
IV.ATVO.HHZ. 2019-12-26T09:31:44.34 0.1 undecidable manual S 256 6.3936 141 -0.15 98
IV.ATLO.EHZ. 2019-12-26T09:31:43.71 0.1 undecidable manual P 215 10.878 126 0.04 100
IV.ATPC.HHZ. 2019-12-26T09:31:43.58 0.1 undecidable manual P 347 9.5793 129 0.1 99
IV.ATVO.HHZ. 2019-12-26T09:31:42.95 0.1 undecidable manual P 256 6.3936 141 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MURB.HHN. ML:0.9 0.00008015 0.78 AML other m 2019-12-26T09:31:47.49
IV.MURB.HHE. ML:1.0 0.00010625000000000001 0.24 AML other m 2019-12-26T09:31:48.05
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