Earthquake with magnitude of ML 1.8 on date 22-09-2021 and time 09:23:59 (Italy) in region 6 km SW Apecchio (PU)

A magnitude ML 1.8 earthquake occured in region: 6 km SW Apecchio (PU), on

  • 22-09-2021 07:23:59 (UTC)
  • 22-09-2021 09:23:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.515, 12.37 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
Apecchio PU 6 1882 1882
Pietralunga PG 10 2111 3993
CittĂ  di Castello PG 12 39913 43906
Piobbico PU 14 2029 45935
Mercatello sul Metauro PU 15 1378 47313
San Giustino PG 16 11297 58610
Montone PG 17 1680 60290
Borgo Pace PU 17 606 60896
Sant'Angelo in Vado PU 17 4133 65029
Monte Santa Maria Tiberina PG 19 1183 66212
Sansepolcro AR 19 15884 82096

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Arezzo (99543 inhabitants)
45 Km N of Perugia (166134 inhabitants)
62 Km SW of Pesaro (94582 inhabitants)
63 Km S of Rimini (147750 inhabitants)
64 Km SW of Fano (60888 inhabitants)
68 Km NW of Foligno (57155 inhabitants)
70 Km S of Cesena (96758 inhabitants)
83 Km SE of Forlì (117913 inhabitants)
87 Km E of Siena (53903 inhabitants)
93 Km W of Ancona (100861 inhabitants)
94 Km E of Firenze (382808 inhabitants)
94 Km SE of Faenza (58541 inhabitants)
99 Km E of Scandicci (50609 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 1.8 2021-09-22
07:23:59
43.5147 12.3703 10 2021-09-22
07:47:54
Sala Sismica INGV-Roma 95727761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 07:23:59 ± 0.06
Latitude 43.5147 ± 0.0036
Longitude 12.3703 ± 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 95727761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 476
Semi-minor axis of confidence ellipse (meter) 375
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50632
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 95727761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 07:47:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
AC.KBN.HHZ. 2021-09-22T07:24:18.08 3.0 undecidable manual Sn 0.37 0
IV.VOBA.EHZ. 2021-09-22T07:24:14.30 3.0 positive manual Pg 20.66 0
ST.CARE.HNZ. 2021-09-22T07:24:13.05 3.0 undecidable manual Pg 11.05 0
IV.ASQU.HHZ. 2021-09-22T07:24:09.72 0.1 undecidable manual P 304 0.5063 50 0.26 87
IV.FRON.EHZ. 2021-09-22T07:24:09.61 0.3 undecidable manual S 89 0.2572 50 0.02 72
IV.ATMI.HHZ. 2021-09-22T07:24:07.37 0.3 undecidable manual S 202 0.1952 115 -0.14 71
IV.CPGN.EHZ. 2021-09-22T07:24:06.28 0.1 undecidable manual P 353 0.2887 50 0.54 85
IV.PARC.HHZ. 2021-09-22T07:24:06.37 0.3 undecidable manual S 325 0.1646 119 -0.08 73
IV.FRON.EHZ. 2021-09-22T07:24:05.03 0.1 undecidable manual P 89 0.2572 50 -0.19 93
IV.ATVO.HHZ. 2021-09-22T07:24:05.70 0.3 undecidable manual S 169 0.1349 123 0.22 71
IV.CRE.HHZ. 2021-09-22T07:24:05.95 0.1 undecidable manual P 289 0.3202 50 -0.34 89
IV.MURB.HHZ. 2021-09-22T07:24:05.45 0.1 undecidable manual P 156 0.2752 50 -0.07 95
IV.MPAG.EHZ. 2021-09-22T07:24:05.98 0.1 undecidable manual P 68 0.304 50 -0.03 95
IV.SSFR.HHZ. 2021-09-22T07:24:05.96 0.1 undecidable manual P 105 0.3085 50 -0.13 93
IV.ATMI.HHZ. 2021-09-22T07:24:04.07 0.1 undecidable manual P 202 0.1952 115 0.06 97
IV.PARC.HHZ. 2021-09-22T07:24:03.25 0.1 undecidable manual P 325 0.1646 119 -0.15 95
IV.APEC.HNZ. 2021-09-22T07:24:03.26 0.3 undecidable manual S 39 0.0567 148 -0.06 74
IV.ATVO.HHZ. 2021-09-22T07:24:02.98 0.1 undecidable manual P 169 0.1349 123 0.14 96
IV.APEC.HNZ. 2021-09-22T07:24:01.61 0.1 undecidable manual P 39 0.0567 148 0.01 100
IV.ZEN8.EHZ. 2021-09-22T07:23:57.94 3.0 undecidable manual Pg 5.5 0
IV.MNTT.EHZ. 2021-09-22T07:23:53.08 3.0 undecidable manual Sg 7.07 0
GU.RORO.HHZ. 2021-09-22T07:23:52.80 3.0 undecidable manual Pn -1.96 0
IV.ISPIC.EHZ. 2021-09-22T07:23:45.24 3.0 undecidable manual Sn -4.4 0
IV.SBPO.HNZ. 2021-09-22T07:23:45.47 3.0 undecidable manual Pn 0.81 0
IV.SRES.HHZ. 2021-09-22T07:23:38.05 3.0 undecidable manual Sg -0.75 0
IV.PP3.EHZ. 2021-09-22T07:23:37.43 3.0 undecidable manual Sn -9.99 0
IV.RM33.EHZ. 2021-09-22T07:23:30.76 3.0 undecidable manual Sn -6.03 0
IV.ECTS.HHZ. 2021-09-22T07:23:30.76 3.0 undecidable manual Sn 7.21 0
IV.RIBO.EHZ.01 2021-09-22T07:23:28.61 3.0 undecidable manual Pg 6.88 0
GU.POPM.HHZ. 2021-09-22T07:23:27.30 3.0 undecidable manual Pn -7.23 0
IV.SACS.HHZ. 2021-09-22T07:23:19.63 3.0 undecidable manual Pg 4.87 0
IV.TST02.HHZ. 2021-09-22T07:23:14.68 3.0 undecidable manual Sg -2.67 0
IV.MF5.EHZ. 2021-09-22T07:23:11.09 3.0 positive manual Pg 2.86 0
IV.PTRJ.HHZ. 2021-09-22T07:22:59.68 3.0 undecidable manual Sg -3.86 0
IV.CAGR.HHZ. 2021-09-22T07:22:53.37 3.0 undecidable manual Pn -6.48 0
IV.MSAG.HHZ. 2021-09-22T07:22:42.62 3.0 undecidable manual Pn -7.76 0
IV.CET2.HHZ. 2021-09-22T07:22:40.13 3.0 undecidable manual P -0.14 0
IV.VAGA.HHZ. 2021-09-22T07:22:40.16 3.0 negative manual P -6.16 0
IX.SSB3.HHZ.02 2021-09-22T07:22:36.83 3.0 negative manual P -4.29 0
IV.COLB.HHZ. 2021-09-22T07:22:35.41 3.0 undecidable manual P -5.33 0
IV.CRTO.HHZ. 2021-09-22T07:22:32.51 3.0 positive manual P -6.93 0
IV.VTIR.HHZ. 2021-09-22T07:22:29.34 3.0 negative manual P -9.95 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TST02.HHN. ML:3.3 0.0003885 0.32 AML other m 2021-09-22T07:23:00.13
IV.TST02.HHE. ML:3.5 0.000669 0.28 AML other m 2021-09-22T07:23:16.65
IV.CPGN.HNE. ML:2 0.0004765 0.86 AML other m 2021-09-22T07:23:44.37
IV.CPGN.HNN. ML:2.3 0.0009025 0.74 AML other m 2021-09-22T07:23:47.37
IV.APEC.HHN. ML:2.4 0.0040164355 0.1024 AML other m 2021-09-22T07:24:03.29
IV.APEC.HNE. ML:2.4 0.003706171 0.1312 AML other m 2021-09-22T07:24:03.44
IV.APEC.HHE. ML:2.7 0.00769 0.14 AML other m 2021-09-22T07:24:03.57
IV.APEC.HNN. ML:2.6 0.00733 0.14 AML other m 2021-09-22T07:24:03.57
IV.ATVO.HHN. ML:1.9 0.0007509236 0.1792 AML other m 2021-09-22T07:24:06.01
IV.ATVO.HHE. ML:1.9 0.000771 0.16 AML other m 2021-09-22T07:24:05.89
IV.PARC.HHN. ML:1.6 0.0003364675 0.1568 AML other m 2021-09-22T07:24:07.51
IV.PARC.HHE. ML:1.6 0.00028861095 0.1184 AML other m 2021-09-22T07:24:07.24
IV.ATMI.HHE. ML:1.7 0.000356 0.86 AML other m 2021-09-22T07:24:08.21
IV.ATMI.HHN. ML:1.7 0.00031125615 0.2016 AML other m 2021-09-22T07:24:08.97
IV.PE3.EHE. ML:1.7 0.0002995 0.38 AML other m 2021-09-22T07:24:09.23
IV.FRON.EHE. ML:1.6 0.0002075 0.12 AML other m 2021-09-22T07:24:09.68
IV.FRON.EHN. ML:1.8 0.0003005 0.12 AML other m 2021-09-22T07:24:09.80
IV.PE3.EHN. ML:1.7 0.0003115 1.12 AML other m 2021-09-22T07:24:11.36
IV.MURB.HHE. ML:1.9 0.0003785 0.24 AML other m 2021-09-22T07:24:11.45
IV.MPAG.EHN. ML:1.5 0.0001355 0.84 AML other m 2021-09-22T07:24:11.56
IV.MPAG.EHE. ML:1.4 9.45E-5 0.1 AML other m 2021-09-22T07:24:12.19
IV.SSFR.HNN. ML:2 0.0004605 0.28 AML other m 2021-09-22T07:24:12.42
IV.CRE.HHN. ML:1.5 0.0001155 0.16 AML other m 2021-09-22T07:24:12.47
IV.CPGN.EHE. ML:1.6 0.00017265 0.9 AML other m 2021-09-22T07:24:12.54
IV.SSFR.HHN. ML:1.9 0.0003 0.66 AML other m 2021-09-22T07:24:12.29
IV.CRE.HHE. ML:1.4 0.0001028 1.14 AML other m 2021-09-22T07:24:12.80
IV.MURB.HHN. ML:1.9 0.00034 1.72 AML other m 2021-09-22T07:24:12.86
IV.SSFR.HNE. ML:2 0.000451 0.6 AML other m 2021-09-22T07:24:13.76
IV.SSFR.HHE. ML:1.9 0.000309 0.6 AML other m 2021-09-22T07:24:13.46
IV.SNTG.HHE. ML:1.2 3.375E-5 0.72 AML other m 2021-09-22T07:24:18.33
IV.SNTG.HHN. ML:1.4 5.935E-5 0.56 AML other m 2021-09-22T07:24:18.38
IV.CPGN.EHN. ML:1.6 0.0001904 0.42 AML other m 2021-09-22T07:24:34.40
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