Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 21-08-2019 and time 00:27:26 (Italy) in region 6 km NW Pietralunga (PG)

A magnitude ML 0.4 earthquake occured in region: 6 km NW Pietralunga (PG), on

  • 20-08-2019 22:27:26 (UTC)
  • 21-08-2019 00:27:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4920, 12.3990 at 10 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
Apecchio PU 8 1882 3993
Città di Castello PG 14 39913 43906
Piobbico PU 14 2029 45935
Montone PG 15 1680 47615
Mercatello sul Metauro PU 18 1378 48993
Cantiano PU 19 2245 51238
San Giustino PG 19 11297 62535
Sant'Angelo in Vado PU 19 4133 66668
Monte Santa Maria Tiberina PG 20 1183 67851

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Arezzo (99543 inhabitants)
43 Km N of Perugia (166134 inhabitants)
62 Km SW of Pesaro (94582 inhabitants)
64 Km SW of Fano (60888 inhabitants)
64 Km NW of Foligno (57155 inhabitants)
65 Km S of Rimini (147750 inhabitants)
73 Km S of Cesena (96758 inhabitants)
86 Km SE of Forlì (117913 inhabitants)
88 Km E of Siena (53903 inhabitants)
91 Km W of Ancona (100861 inhabitants)
97 Km E of Firenze (382808 inhabitants)
98 Km SE of Faenza (58541 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 0.4 2019-08-20
22:27:26		 43.4918 12.3993 10 2019-11-13
14:31:04		 Bollettino Sismico Italiano INGV 73036791
Reviewed
Rev100 		ML 0.3 2019-08-20
22:27:26		 43.4897 12.3952 8 2019-08-20
22:39:46		 Sala Sismica INGV-Roma 71663761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-20 22:27:26 ± 0.05
Latitude 43.4918 ± 0.0018
Longitude 12.3993 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73036791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 213
Semi-minor axis of confidence ellipse (meter) 104
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 170
Circular confidence region, given by single value of horizontal uncertainty (meter) 210.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
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) 0.04137
Epicentral distance of station farthest from the epicenter (degree) 0.24641
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 73036791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-04 09:49:49

ML:0.3

Field Value
Value 0.3
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 71663761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-20 22:39:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MURB.HNZ. 2019-08-20T22:27:36.83 0.3 undecidable manual S 158 27.3504 50 0.31 68
IV.FRON.EHZ. 2019-08-20T22:27:36.10 0.3 undecidable manual S 84 26.4513 50 -0.18 70
IV.ATSC.EHZ. 2019-08-20T22:27:35.49 0.6 undecidable manual S 108 24.2535 112 -0.16 47
IV.ATMI.HHE. 2019-08-20T22:27:34.52 0.3 undecidable manual S 211 20.4684 116 0.1 72
IV.PARC.HHE. 2019-08-20T22:27:34.97 0.3 undecidable manual S 323 21.6672 115 0.16 71
IV.ATFO.HHE. 2019-08-20T22:27:34.27 0.6 undecidable manual S 135 19.6692 117 0.1 48
IV.ATLO.EHE. 2019-08-20T22:27:34.08 0.3 undecidable manual S 178 19.5693 117 -0.09 72
IV.ATMC.EHE. 2019-08-20T22:27:33.43 0.3 undecidable manual S 253 17.3715 120 -0.05 73
IV.NARO.HHZ. 2019-08-20T22:27:33.90 0.3 undecidable manual S 48 19.6692 117 -0.29 69
IV.PIEI.HHZ. 2019-08-20T22:27:32.28 0.3 undecidable manual S 66 11.9769 130 0.34 69
IV.BADI.EHZ. 2019-08-20T22:27:32.07 0.1 undecidable manual S 279 12.6762 128 -0.05 98
IV.TB01.DHE.01 2019-08-20T22:27:32.16 0.3 undecidable manual S 167 12.5763 128 0.05 74
IV.MURB.HNZ. 2019-08-20T22:27:32.32 0.6 undecidable manual P 158 27.3504 50 0.02 48
IV.ATBU.EHE. 2019-08-20T22:27:32.33 0.3 undecidable manual S 98 12.0768 130 0.35 69
IV.ATVA.EHZ. 2019-08-20T22:27:31.80 0.6 undecidable manual P 201 25.3524 112 -0.2 47
IV.ATSC.EHZ. 2019-08-20T22:27:31.55 0.3 undecidable manual P 108 24.2535 112 -0.25 69
IV.PARC.HHE. 2019-08-20T22:27:31.50 0.3 undecidable manual P 323 21.6672 115 0.19 70
IV.TB03.DH1.01 2019-08-20T22:27:31.50 0.3 undecidable manual S 175 10.0788 135 0.04 74
IV.FRON.EHZ. 2019-08-20T22:27:31.84 0.6 undecidable manual P 84 26.4513 50 -0.31 45
IV.ATFO.HHE. 2019-08-20T22:27:30.73 0.3 undecidable manual P 135 19.6692 117 -0.22 70
IV.ATPI.EHZ. 2019-08-20T22:27:30.01 0.3 undecidable manual S 177 4.5954 155 -0.34 70
IV.ATLO.EHE. 2019-08-20T22:27:30.92 0.3 undecidable manual P 178 19.5693 117 -0.02 73
IV.ATPC.HHE. 2019-08-20T22:27:30.24 0.3 undecidable manual S 105 4.7952 154 -0.14 73
IV.ATMC.EHE. 2019-08-20T22:27:30.42 0.3 undecidable manual P 253 17.3715 120 -0.12 72
IV.ATMI.HHE. 2019-08-20T22:27:30.83 0.3 undecidable manual P 211 20.4684 116 -0.26 70
IV.APEC.HHZ. 2019-08-20T22:27:30.72 0.3 undecidable manual S 13 7.5813 143 -0.17 73
IV.NARO.HHZ. 2019-08-20T22:27:30.88 0.1 undecidable manual P 48 19.6692 117 -0.07 97
IV.APEC.HHZ. 2019-08-20T22:27:29.07 0.1 undecidable manual P 13 7.5813 143 0.03 99
IV.TB01.DHE.01 2019-08-20T22:27:29.89 0.3 undecidable manual P 167 12.5763 128 0.14 72
IV.TB03.DH1.01 2019-08-20T22:27:29.54 0.1 undecidable manual P 175 10.0788 135 0.16 96
IV.ATBU.EHE. 2019-08-20T22:27:29.86 0.3 undecidable manual P 98 12.0768 130 0.18 72
IV.PIEI.HHZ. 2019-08-20T22:27:29.77 0.1 undecidable manual P 66 11.9769 130 0.12 97
IV.BADI.EHZ. 2019-08-20T22:27:29.90 0.1 undecidable manual P 279 12.6762 128 0.14 96
IV.ATPI.EHZ. 2019-08-20T22:27:28.76 0.1 undecidable manual P 177 4.5954 155 0.02 100
IV.ATPC.HHE. 2019-08-20T22:27:28.84 0.1 undecidable manual P 105 4.7952 154 0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHE. ML:0.5 0.0000544 0.44 AML other m 2019-08-20T22:27:30.03
IV.ATPI.EHN. ML:0.6 0.0000623 0.1 AML other m 2019-08-20T22:27:30.12
IV.ATPI.HNE. ML:0.8 0.000101518285 0.1312 AML other m 2019-08-20T22:27:30.36
IV.APEC.HHE. ML:0.8 0.0000881 1.84 AML other m 2019-08-20T22:27:31.97
IV.APEC.HHN. ML:0.6 0.000053750000000000005 1.4 AML other m 2019-08-20T22:27:31.78
IV.BADI.EHE. ML:0.4 0.000023753745 0.1408 AML other m 2019-08-20T22:27:32.47
IV.PIEI.HHN. ML:0.1 0.00001535 0.44 AML other m 2019-08-20T22:27:32.72
IV.BADI.EHN. ML:0.4 0.000025461195 0.1024 AML other m 2019-08-20T22:27:32.47
IV.PIEI.HHE. ML:0.1 0.00001585 0.34 AML other m 2019-08-20T22:27:32.54
IV.NARO.HHE. ML:0.1 0.0000080533325 0.0512 AML other m 2019-08-20T22:27:34.75
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