Earthquake with magnitude of ML 1.2 on date 22-09-2021 and time 11:09:42 (Italy) in region 4 km SE Pietralunga (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km SE Pietralunga (PG), on

  • 22-09-2021 09:09:42 (UTC)
  • 22-09-2021 11:09:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.419, 12.471 at 8 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 4 2111 2111
Gubbio PG 11 32216 34327
Montone PG 13 1680 36007
Cantiano PU 14 2245 38252
Scheggia e Pascelupo PG 16 1393 39645
Apecchio PU 16 1882 41527
Umbertide PG 17 16681 58208
CittĂ  di Castello PG 19 39913 98121
Piobbico PU 19 2029 100150

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km N of Perugia (166134 inhabitants)
48 Km E of Arezzo (99543 inhabitants)
55 Km NW of Foligno (57155 inhabitants)
65 Km SW of Fano (60888 inhabitants)
65 Km SW of Pesaro (94582 inhabitants)
72 Km S of Rimini (147750 inhabitants)
82 Km S of Cesena (96758 inhabitants)
87 Km W of Ancona (100861 inhabitants)
93 Km E of Siena (53903 inhabitants)
96 Km SE of Forlì (117913 inhabitants)
96 Km N of Terni (111501 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 1.2 2021-09-22
09:09:42
43.4188 12.4708 8 2021-09-22
09:16:31
Sala Sismica INGV-Roma 95731401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 09:09:42 ± 0.06
Latitude 43.4188 ± 0.0027
Longitude 12.4708 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95731401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 278
Semi-minor axis of confidence ellipse (meter) 79
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 134
Circular confidence region, given by single value of horizontal uncertainty (meter) 280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 41
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.46675
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 20
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 95731401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 09:16:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PCRO.HNZ. 2021-09-22T09:10:07.77 3.0 undecidable manual S -2.23 0
IV.MPAG.EHZ. 2021-09-22T09:09:54.36 0.6 undecidable manual S 45 0.2968 104 0.36 45
IV.ATCC.EHZ. 2021-09-22T09:09:52.93 0.6 undecidable manual S 152 0.2635 106 0.15 47
IV.EL6.EHZ. 2021-09-22T09:09:52.16 0.1 undecidable manual P 101 0.4667 50 0.16 90
IV.ATVA.EHZ. 2021-09-22T09:09:50.30 0.6 undecidable manual S 224 0.1943 111 0.06 48
IV.CAFI.HHZ. 2021-09-22T09:09:50.63 0.6 undecidable manual P 256 0.3777 50 0.16 46
IV.FRON.EHZ. 2021-09-22T09:09:50.80 0.6 undecidable manual S 62 0.2095 109 0.01 49
IV.NARO.HHZ. 2021-09-22T09:09:50.54 0.6 undecidable manual S 22 0.2077 110 -0.18 47
IV.CPGN.EHZ. 2021-09-22T09:09:50.41 0.1 undecidable manual P 344 0.3975 50 -0.4 87
IV.ATMC.EHZ. 2021-09-22T09:09:50.64 0.6 undecidable manual S 278 0.2041 110 0.06 48
IV.MURB.HHZ. 2021-09-22T09:09:49.65 0.6 undecidable manual S 166 0.161 115 0.61 43
IV.APEC.HHZ. 2021-09-22T09:09:48.76 0.6 undecidable manual S 345 0.1439 117 0.29 47
IV.ATCC.EHZ. 2021-09-22T09:09:48.14 0.6 undecidable manual P 152 0.2635 106 -0.18 47
IV.MPAG.EHZ. 2021-09-22T09:09:48.69 1.0 undecidable manual P 45 0.2968 104 -0.33 22
IV.ATSC.EHZ. 2021-09-22T09:09:48.94 0.6 undecidable manual S 88 0.1565 115 0.05 49
IV.ATMC.EHZ. 2021-09-22T09:09:47.39 0.1 undecidable manual P 278 0.2041 110 0.34 91
IV.ATLO.HNZ. 2021-09-22T09:09:47.45 0.6 undecidable manual S 204 0.1133 123 0.01 50
IV.ATSC.EHZ. 2021-09-22T09:09:46.00 0.1 undecidable manual P 88 0.1565 115 -0.08 97
IV.APEC.HHZ. 2021-09-22T09:09:46.06 0.6 negative manual P 345 0.1439 117 0.23 47
IV.ATVA.EHZ. 2021-09-22T09:09:46.87 0.1 undecidable manual P 224 0.1943 111 0.02 98
IV.ATBU.EHZ. 2021-09-22T09:09:46.76 0.6 undecidable manual S 45 0.08 133 0.34 47
IV.MURB.HHZ. 2021-09-22T09:09:46.28 0.6 negative manual P 166 0.161 115 0.12 48
IV.FRON.EHZ. 2021-09-22T09:09:46.80 0.1 undecidable manual P 62 0.2095 109 -0.37 91
IV.ATFO.HHZ. 2021-09-22T09:09:46.47 0.6 undecidable manual S 126 0.0899 129 -0.24 48
IV.ATPC.HNZ. 2021-09-22T09:09:46.24 0.6 undecidable manual S 351 0.063 140 0.28 47
IV.NARO.HHZ. 2021-09-22T09:09:46.94 0.1 positive manual P 22 0.2077 110 -0.19 94
IV.TB01.DHZ. 2021-09-22T09:09:45.39 0.3 undecidable manual S 215 0.045 149 -0.17 73
IV.ATVO.HHZ. 2021-09-22T09:09:45.68 0.6 undecidable manual S 232 0.0594 141 -0.2 48
IV.TB03.DHZ. 2021-09-22T09:09:45.30 0.6 undecidable manual S 248 0.0477 147 -0.31 47
IV.ATPI.EHZ. 2021-09-22T09:09:45.64 0.6 undecidable manual S 303 0.0594 141 -0.23 48
IV.ATLO.HNZ. 2021-09-22T09:09:45.23 0.1 undecidable manual P 204 0.1133 123 -0.01 99
IV.ATFO.HHZ. 2021-09-22T09:09:44.81 0.1 positive manual P 126 0.0899 129 0 100
IV.ATPC.HNZ. 2021-09-22T09:09:44.50 0.1 undecidable manual P 351 0.063 140 0.12 98
IV.TB01.DHZ. 2021-09-22T09:09:44.06 0.1 undecidable manual P 215 0.045 149 -0.09 99
IV.ATVO.HHZ. 2021-09-22T09:09:44.22 1.0 undecidable manual P 232 0.0594 141 -0.12 25
IV.TB03.DHZ. 2021-09-22T09:09:44.08 0.1 undecidable manual P 248 0.0477 147 -0.1 99
IV.ATPI.EHZ. 2021-09-22T09:09:44.39 0.1 positive manual P 303 0.0594 141 0.06 99
IV.ATBU.EHZ. 2021-09-22T09:09:44.76 0.1 undecidable manual P 45 0.08 133 0.12 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHN. ML:1.2 0.0003135 0.12 AML other m 2021-09-22T09:09:45.80
IV.ATPI.EHN. ML:1.1 0.000234 0.64 AML other m 2021-09-22T09:09:45.81
IV.ATPI.EHE. ML:1.1 0.0002365 1.46 AML other m 2021-09-22T09:09:45.90
IV.ATVO.HHE. ML:1.3 0.00035 0.4 AML other m 2021-09-22T09:09:45.72
IV.ATFO.HHN. ML:1.3 0.000312 0.44 AML other m 2021-09-22T09:09:47.05
IV.ATFO.HHE. ML:1.4 0.0003555 0.3 AML other m 2021-09-22T09:09:47.27
IV.APEC.HHN. ML:1.3 0.000187 0.14 AML other m 2021-09-22T09:09:49.08
IV.APEC.HHE. ML:1.4 0.000232 0.14 AML other m 2021-09-22T09:09:49.24
IV.MURB.HHN. ML:1.5 0.000282 1.06 AML other m 2021-09-22T09:09:50.21
IV.NARO.HHE. ML:0.9 4.91E-5 0.8 AML other m 2021-09-22T09:09:51.12
IV.MURB.HHE. ML:1.6 0.000332 0.24 AML other m 2021-09-22T09:09:51.13
IV.NARO.HHN. ML:0.9 5.1E-5 0.42 AML other m 2021-09-22T09:09:51.52
IV.ATCC.EHN. ML:1.4 0.00011665 0.44 AML other m 2021-09-22T09:09:53.26
IV.ATCC.EHE. ML:1.4 0.0001195 1.12 AML other m 2021-09-22T09:09:53.86
IV.CAFI.HHN. ML:0.8 1.83E-5 0.42 AML other m 2021-09-22T09:09:57.55
IV.CAFI.HHE. ML:0.9 2.37E-5 0.64 AML other m 2021-09-22T09:09:57.43
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