Earthquake with magnitude of ML 1.0 on date 17-10-2021 and time 19:59:57 (UTC) in region 7 km NW Pietralunga (PG)

A magnitude ML 1.0 earthquake occured in region: 7 km NW Pietralunga (PG), on

  • 17-10-2021 19:59:57 (UTC)
  • 17-10-2021 21:59:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.492, 12.388 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
Pietralunga PG 7 2111 2111
Apecchio PU 8 1882 3993
CittĂ  di Castello PG 13 39913 43906
Piobbico PU 15 2029 45935
Montone PG 15 1680 47615
Mercatello sul Metauro PU 18 1378 48993
San Giustino PG 18 11297 60290
Monte Santa Maria Tiberina PG 19 1183 61473
Cantiano PU 20 2245 63718
Sant'Angelo in Vado PU 20 4133 67851
Borgo Pace PU 20 606 68457

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Arezzo (99543 inhabitants)
43 Km N of Perugia (166134 inhabitants)
63 Km SW of Pesaro (94582 inhabitants)
64 Km SW of Fano (60888 inhabitants)
65 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)
87 Km E of Siena (53903 inhabitants)
92 Km W of Ancona (100861 inhabitants)
96 Km E of Firenze (382808 inhabitants)
97 Km SE of Faenza (58541 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 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
Reviewed
Rev100
ML 1.0 2021-10-17
19:59:57
43.4918 12.3878 10 2021-10-17
20:05:33
Sala Sismica INGV-Roma 96695001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-17 19:59:57 ± 0.14
Latitude 43.4918 ± 0.0027
Longitude 12.3878 ± 0.0037
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96695001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 223
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 290
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24911
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.5
Num. used stations 12
Type of magnitude ML
Reference to an origin 96695001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-17 20:05:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LINA.HHZ. 2021-10-17T20:01:36.60 3.0 undecidable manual Pn -1 0
IX.SCL3.EHZ.02 2021-10-17T20:01:35.89 3.0 undecidable manual Sn 1.02 0
IV.MONC.HHZ. 2021-10-17T20:01:21.02 3.0 undecidable manual Sg 15.99 0
IV.BSSO.HHZ. 2021-10-17T20:01:20.05 3.0 undecidable manual Sg 11.08 0
IV.IST3.HHZ. 2021-10-17T20:01:17.52 3.0 positive manual Pg 12.12 0
IV.PZUN.HHZ. 2021-10-17T20:00:45.37 3.0 positive manual Pn -2.12 0
IV.VOBA.EHZ. 2021-10-17T20:00:39.09 3.0 undecidable manual Sn -1.24 0
IV.MCIV.CHZ. 2021-10-17T20:00:28.33 3.0 undecidable manual Sg 1.89 0
IV.MMO1.EHZ. 2021-10-17T20:00:27.86 3.0 undecidable manual Sn -4.71 0
IV.MBAL.EHZ. 2021-10-17T20:00:22.83 3.0 negative manual Pg 9.15 0
IV.CRTC.HHZ. 2021-10-17T20:00:19.42 3.0 undecidable manual Sn 0.19 0
IV.VIVA.HHZ. 2021-10-17T20:00:16.83 3.0 positive manual Pn -2.97 0
IV.MMO1.EHZ. 2021-10-17T20:00:13.04 3.0 positive manual Pn 2.97 0
IV.VENL.EHZ. 2021-10-17T20:00:10.40 3.0 negative manual Pn 1.01 0
IV.MURB.HHZ. 2021-10-17T20:00:07.68 0.3 undecidable manual S 156 0.2491 109 -0.09 72
IV.NARO.HHZ. 2021-10-17T20:00:05.21 0.3 undecidable manual S 49 0.1835 115 -0.21 72
IV.ATFO.HHZ. 2021-10-17T20:00:05.36 0.6 undecidable manual S 133 0.1826 115 -0.04 49
IV.MURB.HHZ. 2021-10-17T20:00:03.64 0.1 undecidable manual P 156 0.2491 109 0.16 95
IV.PIEI.HHZ. 2021-10-17T20:00:03.27 0.3 undecidable manual S 68 0.1151 127 0.12 74
GU.GSCL.HHZ. 2021-10-17T20:00:03.64 3.0 undecidable manual Pg -0.59 0
IV.NARO.HHZ. 2021-10-17T20:00:02.04 0.3 positive manual P 49 0.1835 115 -0.08 73
IV.BADI.EHZ. 2021-10-17T20:00:02.71 0.3 undecidable manual S 280 0.1052 129 -0.15 74
IV.ATFO.HHZ. 2021-10-17T20:00:02.04 0.1 undecidable manual P 133 0.1826 115 -0.07 98
IV.APEC.HHZ. 2021-10-17T20:00:01.97 0.3 undecidable manual S 19 0.0701 141 0.07 75
IV.APEC.HHZ. 2021-10-17T20:00:00.29 0.6 positive manual P 19 0.0701 141 0.2 49
IV.BADI.EHZ. 2021-10-17T20:00:00.71 0.1 negative manual P 280 0.1052 129 0.07 100
IV.PIEI.HHZ. 2021-10-17T20:00:00.98 1.0 negative manual P 68 0.1151 127 0.16 24
IV.BRSN.EHZ. 2021-10-17T19:59:59.46 3.0 positive manual P -0.37 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APEC.HHE. ML:0.8 9.975E-5 0.14 AML other m 2021-10-17T20:00:02.27
IV.APEC.HHN. ML:0.6 6.315E-5 0.56 AML other m 2021-10-17T20:00:02.07
IV.BRSN.EHE. ML:2.4 0.0003045 0.52 AML other m 2021-10-17T20:00:02.62
IV.BADI.EHE. ML:0.9 8.95E-5 0.18 AML other m 2021-10-17T20:00:03.05
IV.BADI.EHN. ML:0.8 7.53E-5 0.2 AML other m 2021-10-17T20:00:03.10
IV.PIEI.HHN. ML:0.5 3.55E-5 0.24 AML other m 2021-10-17T20:00:03.66
IV.PIEI.HHE. ML:0.7 5.405E-5 0.16 AML other m 2021-10-17T20:00:03.84
IV.BRSN.EHN. ML:2.3 0.000246 1.44 AML other m 2021-10-17T20:00:05.24
IV.MURB.HHE. ML:1 5.59E-5 1.14 AML other m 2021-10-17T20:00:08.24
IV.MURB.HHN. ML:1 6.005E-5 1.14 AML other m 2021-10-17T20:00:08.40
IV.VENL.EHE. ML:3.3 0.0005255 0.54 AML other m 2021-10-17T20:00:35.72
IV.VENL.EHN. ML:3.6 0.001083 0.12 AML other m 2021-10-17T20:00:35.63
IV.VOBA.EHN. ML:2.8 8.31E-5 0.2 AML other m 2021-10-17T20:00:40.66
IV.VOBA.EHE. ML:3 0.000162 0.06 AML other m 2021-10-17T20:00:43.03
IV.MCIV.CHE. ML:1.8 6.555E-5 1.64 AML other m 2021-10-17T20:00:51.02
IV.MCIV.CHN. ML:1.9 8.24E-5 1.62 AML other m 2021-10-17T20:00:51.08
IX.SCL3.EHE.02 ML:3.3 0.0001265 0.26 AML other m 2021-10-17T20:01:18.83
IX.SCL3.EHN.02 ML:3.4 0.000136 0.44 AML other m 2021-10-17T20:01:19.83
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