Earthquake with magnitude of ML 1.9 on date 26-09-2021 and time 11:56:12 (UTC) in region 4 km W Castel Ritaldi (PG)

A magnitude ML 1.9 earthquake occured in region: 4 km W Castel Ritaldi (PG), on

  • 26-09-2021 11:56:12 (UTC)
  • 26-09-2021 13:56:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.807, 12.626 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
Castel Ritaldi PG 4 3278 3278
Giano dell'Umbria PG 5 3846 7124
Massa Martana PG 9 3770 10894
Montefalco PG 10 5679 16573
Spoleto PG 12 38218 54791
Campello sul Clitunno PG 12 2442 57233
Trevi PG 13 8469 65702
Gualdo Cattaneo PG 13 6155 71857
Acquasparta TR 14 4778 76635
Bevagna PG 14 5081 81716
Foligno PG 18 57155 138871
Todi PG 18 16851 155722
Collazzone PG 18 3473 159195
Sant'Anatolia di Narco PG 19 564 159759
Vallo di Nera PG 20 364 160123
Scheggino PG 20 461 160584

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km SW of Foligno (57155 inhabitants)
27 Km N of Terni (111501 inhabitants)
39 Km SE of Perugia (166134 inhabitants)
61 Km NE of Viterbo (67173 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
90 Km W of Teramo (54892 inhabitants)
90 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
95 Km SE of Arezzo (99543 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 1.9 2021-09-26
11:56:12
42.8067 12.6265 10 2021-09-26
12:06:00
Sala Sismica INGV-Roma 95903891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-26 11:56:12 ± 0.05
Latitude 42.8067 ± 0.0027
Longitude 12.6265 ± 0.0049
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 95903891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 260
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 264
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.58906
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 64
Type of magnitude ML
Reference to an origin 95903891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-26 12:06:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RIBO.EHE.01 2021-09-26T11:56:53.15 3.0 undecidable manual S 0.39 0
IV.MNTT.EHN. 2021-09-26T11:56:40.82 3.0 undecidable manual S 1.57 0
IV.ARVD.HHZ. 2021-09-26T11:56:38.75 3.0 undecidable manual S 0.04 0
IV.MF5.EHZ. 2021-09-26T11:56:36.49 3.0 undecidable manual S 1.12 0
IV.SSFR.HHN. 2021-09-26T11:56:35.21 3.0 undecidable manual S -0.66 0
IV.EL6.EHZ. 2021-09-26T11:56:35.15 3.0 undecidable manual S -0.11 0
IV.SAP2.EHN. 2021-09-26T11:56:34.55 3.0 undecidable manual S -0.82 0
IV.ATVO.HHZ. 2021-09-26T11:56:34.62 3.0 undecidable manual S -0.11 0
IV.SMA1.EHN. 2021-09-26T11:56:33.06 3.0 undecidable manual S 0.61 0
IV.CPGN.EHZ. 2021-09-26T11:56:33.29 3.0 positive manual P 0.5 0
IV.VIVA.HHN. 2021-09-26T11:56:32.40 3.0 undecidable manual P -0.96 0
IV.RM33.EHZ. 2021-09-26T11:56:31.32 3.0 undecidable manual S -0.36 0
IV.CSP1.EHE. 2021-09-26T11:56:30.99 3.0 undecidable manual S -0.27 0
IV.TOLF.HHE. 2021-09-26T11:56:28.74 3.0 positive manual P -1.43 0
IV.MC2.EHN. 2021-09-26T11:56:27.49 3.0 undecidable manual S -0.88 0
IV.CING.HHZ. 2021-09-26T11:56:26.40 3.0 negative manual P -0.32 0
IV.EL6.EHZ. 2021-09-26T11:56:25.01 3.0 negative manual P -0.29 0
IV.ATVO.HHZ. 2021-09-26T11:56:25.54 3.0 negative manual P 0.54 0
IV.MF5.EHZ. 2021-09-26T11:56:25.71 3.0 undecidable manual P 0.35 0
IV.SAP2.EHN. 2021-09-26T11:56:25.97 3.0 negative manual P 0.61 0
IV.SMA1.EHZ. 2021-09-26T11:56:24.07 3.0 positive manual P 0.35 0
IV.ATMI.HHZ. 2021-09-26T11:56:24.34 1.0 undecidable manual P 334 0.5891 50 0.04 24
IV.SNTG.HHZ. 2021-09-26T11:56:23.20 0.6 positive manual P 27 0.5036 50 0.36 46
IV.ARRO.EHZ. 2021-09-26T11:56:23.00 0.3 undecidable manual S 156 0.2491 109 0.22 74
IV.RM33.EHZ. 2021-09-26T11:56:23.21 3.0 negative manual P -0.08 0
IV.CSP1.EHZ. 2021-09-26T11:56:22.91 3.0 undecidable manual P -0.14 0
IV.GAVE.EHZ. 2021-09-26T11:56:22.22 0.3 undecidable manual S 120 0.2275 111 0.23 76
IV.MURB.HHN. 2021-09-26T11:56:22.33 1.0 undecidable manual P 351 0.4623 50 0.19 24
IV.NRCA.HHN. 2021-09-26T11:56:22.00 3.0 positive manual P 1.82 0
IV.CESX.HHZ. 2021-09-26T11:56:21.03 0.3 undecidable manual S 188 0.1996 113 0.01 79
IV.MGAB.HHZ. 2021-09-26T11:56:21.09 0.6 undecidable manual P 286 0.3912 50 0.17 48
IV.MC2.EHZ. 2021-09-26T11:56:21.69 3.0 positive manual P 0.26 0
IV.FDMO.HHZ. 2021-09-26T11:56:21.02 3.0 negative manual P -0.14 0
IV.ASSB.HHE. 2021-09-26T11:56:21.53 1.0 undecidable manual S -0.86 0.57
IV.MML1.EHZ. 2021-09-26T11:56:20.85 0.6 negative manual P 39 0.3975 50 -0.17 49
IV.ATCC.EHZ. 2021-09-26T11:56:20.67 0.6 negative manual P 1 0.3786 50 -0.03 51
IT.FOPC.HGZ. 2021-09-26T11:56:20.15 0.3 undecidable manual S 19 0.1727 117 0.09 79
IV.LNSS.HHZ. 2021-09-26T11:56:20.23 0.3 undecidable manual P 124 0.366 50 -0.25 73
IV.CESI.HHZ. 2021-09-26T11:56:18.88 0.1 undecidable manual P 46 0.2842 50 -0.21 100
IV.ARRO.EHZ. 2021-09-26T11:56:18.49 0.6 negative manual P 156 0.2491 109 0 52
IV.CESX.HHZ. 2021-09-26T11:56:17.23 1.0 undecidable manual P 188 0.1996 113 -0.24 25
IV.GAVE.EHZ. 2021-09-26T11:56:17.83 0.3 negative manual P 120 0.2275 111 -0.2 75
IT.FOPC.HGZ. 2021-09-26T11:56:16.99 0.6 undecidable manual P 19 0.1727 117 0.08 52
IT.GNU.HGZ. 2021-09-26T11:56:16.21 0.6 undecidable manual S 266 0.0414 154 -0.11 53
IV.MOMA.HNZ. 2021-09-26T11:56:16.36 0.6 undecidable manual S 266 0.0414 154 0.04 54
IV.MOMA.HNZ. 2021-09-26T11:56:14.75 0.6 negative manual P 266 0.0414 154 -0.01 54
IT.GNU.HGZ. 2021-09-26T11:56:14.75 0.6 undecidable manual P 266 0.0414 154 -0.01 54
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:2.4 0.00398 0.22 AML other m 2021-09-26T11:56:16.53
IV.MOMA.HNN. ML:2.3 0.00377 0.22 AML other m 2021-09-26T11:56:16.53
IV.MOMA.HHE. ML:2.3 0.0035637675 0.1216 AML other m 2021-09-26T11:56:16.32
IV.MOMA.HNE. ML:2.3 0.0033226965 0.1152 AML other m 2021-09-26T11:56:16.33
IV.GAVE.EHE. ML:1.9 0.000491 0.34 AML other m 2021-09-26T11:56:22.67
IV.CESX.HHN. ML:2.1 0.00094522505 0.32 AML other m 2021-09-26T11:56:22.44
IV.GAVE.EHN. ML:1.9 0.0004305 0.2 AML other m 2021-09-26T11:56:23.11
IV.CESX.HHE. ML:2.2 0.0009745 0.52 AML other m 2021-09-26T11:56:24.00
IV.ARRO.EHE. ML:1.9 0.000455 0.26 AML other m 2021-09-26T11:56:24.33
IV.CESI.HHE. ML:1.5 0.00014527554 0.3392 AML other m 2021-09-26T11:56:28.29
IV.ARRO.EHN. ML:1.6 0.0002016529 0.5184 AML other m 2021-09-26T11:56:23.34
IV.CESI.HHN. ML:1.9 0.000388 0.3 AML other m 2021-09-26T11:56:26.58
IV.LNSS.HHE. ML:2 0.00031656265 0.2176 AML other m 2021-09-26T11:56:26.45
IV.MML1.HNE. ML:1.8 0.00017361565 0.1856 AML other m 2021-09-26T11:56:28.74
IV.ATCC.EHE. ML:2 0.0003045 0.26 AML other m 2021-09-26T11:56:27.69
IV.MML1.EHE. ML:1.8 0.00018222065 0.1216 AML other m 2021-09-26T11:56:28.74
IV.LNSS.HHN. ML:1.8 0.0002186936 0.1408 AML other m 2021-09-26T11:56:28.59
IV.FDMO.HHN. ML:1.5 0.0001013793 0.1408 AML other m 2021-09-26T11:56:30.69
IV.MML1.EHN. ML:1.7 0.00016058115 0.16 AML other m 2021-09-26T11:56:29.73
IV.MML1.HNN. ML:1.7 0.000164637175 0.16 AML other m 2021-09-26T11:56:29.73
IV.FDMO.HHE. ML:1.6 0.0001135494 0.2624 AML other m 2021-09-26T11:56:29.57
IV.ATCC.EHN. ML:2 0.000291 0.22 AML other m 2021-09-26T11:56:30.20
IV.MGAB.HHE. ML:1.8 0.000183 0.28 AML other m 2021-09-26T11:56:30.51
IV.MURB.HHN. ML:2.3 0.0005058484 0.3008 AML other m 2021-09-26T11:56:31.46
IV.MURB.HHE. ML:2.4 0.0006795 0.22 AML other m 2021-09-26T11:56:32.27
IV.MGAB.HHN. ML:1.8 0.0002065 0.22 AML other m 2021-09-26T11:56:32.56
IV.RM33.EHN. ML:1.8 0.00012 0.2 AML other m 2021-09-26T11:56:32.73
IV.CSP1.EHN. ML:2 0.00021292015 0.1408 AML other m 2021-09-26T11:56:32.34
IV.SNTG.HHN. ML:1.8 0.0001585 0.22 AML other m 2021-09-26T11:56:33.15
IV.SNTG.HHE. ML:1.6 9.19E-5 0.16 AML other m 2021-09-26T11:56:33.33
IV.CSP1.EHE. ML:2.1 0.000312 0.26 AML other m 2021-09-26T11:56:33.49
IV.RM33.EHE. ML:1.6 8.63E-5 0.26 AML other m 2021-09-26T11:56:34.20
IV.SMA1.EHE. ML:1.8 0.000116879945 0.1984 AML other m 2021-09-26T11:56:35.56
IV.VIVA.HHN. ML:2.6 0.0002867707 0.16 AML other m 2021-09-26T11:56:35.39
IV.ATVO.HHN. ML:1.6 6.43E-5 0.38 AML other m 2021-09-26T11:56:38.12
IV.CING.HHN. ML:1.9 0.000121 0.2 AML other m 2021-09-26T11:56:38.13
IV.CING.HHE. ML:1.7 7.555E-5 0.22 AML other m 2021-09-26T11:56:38.36
IV.ATMI.HHN. ML:0 0.0002824967 0.3648 AML other m 2021-09-26T11:56:38.86
IV.ATVO.HHE. ML:1.6 8.035E-5 0.48 AML other m 2021-09-26T11:56:39.41
IV.SMA1.EHN. ML:1.8 0.000113746845 0.32 AML other m 2021-09-26T11:56:40.13
IV.ATMI.HHE. ML:0 0.00019841615 0.2816 AML other m 2021-09-26T11:56:41.67
IV.VIVA.HHE. ML:2.6 0.000345 0.34 AML other m 2021-09-26T11:56:46.29
IV.CPGN.HNE. ML:2.6 0.0002910283 1.1776 AML other m 2021-09-26T11:56:58.28
IV.CPGN.HNN. ML:2.9 0.00062013445 1.28 AML other m 2021-09-26T11:56:58.35
IV.GAVE.HNE. ML:1.9 0.00051368565 0.3392 AML other m 2021-09-26T11:56:22.00
IV.GAVE.HNN. ML:1.5 0.0001975657 1.0816 AML other m 2021-09-26T11:56:23.10
IV.CESI.HNE. ML:1.6 0.000174519865 0.5184 AML other m 2021-09-26T11:56:33.17
IV.CESI.HNN. ML:1.9 0.00035448195 0.3136 AML other m 2021-09-26T11:56:26.58
IV.LNSS.HNE. ML:2 0.0003004474 0.3968 AML other m 2021-09-26T11:56:26.94
IV.LNSS.HNN. ML:1.9 0.00024302855 0.1536 AML other m 2021-09-26T11:56:28.60
IV.MGAB.HNE. ML:1.8 0.00017468755 0.3776 AML other m 2021-09-26T11:56:30.52
IV.MGAB.HNN. ML:1.7 0.00017142075 0.288 AML other m 2021-09-26T11:56:29.09
IV.MURB.HNE. ML:2.4 0.00063205955 0.2496 AML other m 2021-09-26T11:56:32.26
IV.MURB.HNN. ML:2.2 0.0004392001 0.288 AML other m 2021-09-26T11:56:30.97
IV.SNTG.HNE. ML:1.8 0.00014872755 0.3712 AML other m 2021-09-26T11:56:36.09
IV.SNTG.HNN. ML:1.8 0.000153913405 0.2176 AML other m 2021-09-26T11:56:33.16
IV.RM33.HNE. ML:1.8 0.000124252575 0.5632 AML other m 2021-09-26T11:56:44.44
IV.RM33.HNN. ML:2 0.00020520745 0.5632 AML other m 2021-09-26T11:56:33.20
IV.EL6.EHE. ML:2.4 0.0004448447 0.1792 AML other m 2021-09-26T11:56:35.98
IV.EL6.EHN. ML:2.1 0.0002082864 0.1408 AML other m 2021-09-26T11:56:36.35
IV.MF5.EHE. ML:1.7 8.348058E-5 0.16 AML other m 2021-09-26T11:56:37.40
IV.MF5.EHN. ML:1.8 9.3083895E-5 0.3008 AML other m 2021-09-26T11:56:39.78
IV.SAP2.EHE. ML:1.7 7.577433E-5 0.4032 AML other m 2021-09-26T11:56:44.46
IV.SAP2.EHN. ML:2.5 0.0005254955 0.16 AML other m 2021-09-26T11:56:37.27
IV.CING.HNE. ML:3.7 0.00688481 0.544 AML other m 2021-09-26T11:56:53.84
IV.CING.HNN. ML:3.5 0.0053347565 0.5888 AML other m 2021-09-26T11:56:36.11
IV.TOLF.HHE. ML:2.1 0.00013313265 0.0384 AML other m 2021-09-26T11:56:37.65
IV.TOLF.HHN. ML:1.5 2.9515625E-5 0.6592 AML other m 2021-09-26T11:56:56.54
IV.CPGN.EHE. ML:1.5 2.6501338E-5 0.48 AML other m 2021-09-26T11:56:56.29
IV.CPGN.EHN. ML:1.5 2.3098765E-5 0.7232 AML other m 2021-09-26T11:57:01.08
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