Earthquake with magnitude of ML 1.4 on date 19-09-2021 and time 07:28:35 (UTC) in region 4 km N Acquasparta (TR)

A magnitude ML 1.4 earthquake occured in region: 4 km N Acquasparta (TR), on

  • 19-09-2021 07:28:35 (UTC)
  • 19-09-2021 09:28:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.73, 12.561 at 9 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
Acquasparta TR 4 4778 4778
Massa Martana PG 6 3770 8548
Montecastrilli TR 11 5022 13570
Giano dell'Umbria PG 12 3846 17416
San Gemini TR 13 5018 22434
Avigliano Umbro TR 14 2558 24992
Todi PG 14 16851 41843
Castel Ritaldi PG 14 3278 45121
Spoleto PG 15 38218 83339
Montefalco PG 20 5679 89018
Gualdo Cattaneo PG 20 6155 95173
Terni TR 20 111501 206674

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NW of Terni (111501 inhabitants)
28 Km SW of Foligno (57155 inhabitants)
44 Km SE of Perugia (166134 inhabitants)
51 Km NE of Viterbo (67173 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
82 Km N of Guidonia Montecelio (88673 inhabitants)
87 Km N of Tivoli (56533 inhabitants)
93 Km N of Roma (2864731 inhabitants)
94 Km W of Teramo (54892 inhabitants)
95 Km NE of Civitavecchia (52991 inhabitants)
99 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 1.4 2021-09-19
07:28:35
42.7303 12.5607 9 2021-09-19
07:40:52
Sala Sismica INGV-Roma 95624361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-19 07:28:35 ± 0.06
Latitude 42.7303 ± 0.0036
Longitude 12.5607 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95624361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 435
Semi-minor axis of confidence ellipse (meter) 241
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 225
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 41
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.73924
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 95624361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-19 07:40:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SACR.HHZ. 2021-09-19T07:29:36.57 3.0 undecidable manual Sn 0.01 0
IV.PE3.EHZ. 2021-09-19T07:29:09.26 3.0 undecidable manual Sg 0.27 0
IV.CAFI.HHZ. 2021-09-19T07:29:01.39 1.0 undecidable manual S 324 0.7392 50 1.03 16
IV.EL6.EHZ. 2021-09-19T07:29:00.59 0.6 undecidable manual S 33 0.7177 50 0.89 34
IV.ATMI.HHZ. 2021-09-19T07:28:57.55 1.0 undecidable manual S 341 0.6403 50 0.13 22
IV.CSP1.EHZ. 2021-09-19T07:28:56.40 0.1 undecidable manual S 52 0.5936 50 0.35 84
IV.ATVA.EHZ. 2021-09-19T07:28:56.63 0.6 undecidable manual S 340 0.5837 50 0.89 35
IV.RM33.EHZ. 2021-09-19T07:28:54.47 0.3 undecidable manual S 114 0.5297 50 0.34 64
IV.MML1.EHZ. 2021-09-19T07:28:53.06 1.0 undecidable manual S 38 0.4865 50 0.18 22
IV.FDMO.HHZ. 2021-09-19T07:28:53.09 0.6 undecidable manual S 51 0.4919 50 0.05 46
IV.MURB.HHZ. 2021-09-19T07:28:53.95 1.0 undecidable manual S 357 0.5333 50 -0.29 22
IV.SACS.HNE. 2021-09-19T07:28:53.87 1.0 undecidable manual S 284 0.4919 50 0.84 18
IV.NRCA.HHZ. 2021-09-19T07:28:50.98 0.1 undecidable manual S 76 0.4191 50 0.12 92
IV.EL6.EHZ. 2021-09-19T07:28:49.45 0.6 negative manual P 33 0.7177 50 -0.02 44
IV.CESI.HHZ. 2021-09-19T07:28:49.23 0.3 undecidable manual S 42 0.3723 50 -0.25 67
IV.CAFI.HHZ. 2021-09-19T07:28:49.69 0.6 positive manual P 324 0.7392 50 -0.16 42
IV.LNSS.HHZ. 2021-09-19T07:28:49.68 0.3 undecidable manual S 110 0.375 50 0.12 69
IV.MGAB.HNE. 2021-09-19T07:28:49.47 0.3 undecidable manual S 299 0.3759 50 -0.12 69
IV.ATMI.HHZ. 2021-09-19T07:28:48.26 0.6 undecidable manual P 341 0.6403 50 0.1 44
IV.ATVA.EHZ. 2021-09-19T07:28:47.03 0.1 undecidable manual P 340 0.5837 50 -0.16 88
IV.ASSB.HHZ. 2021-09-19T07:28:47.90 1.0 undecidable manual S 13 0.3202 50 -0.04 24
IV.CSP1.EHZ. 2021-09-19T07:28:47.46 0.6 undecidable manual P 52 0.5936 50 0.1 44
IV.ATLO.HNZ. 2021-09-19T07:28:47.28 0.1 undecidable manual P 349 0.5954 50 -0.1 89
IV.RM33.EHZ. 2021-09-19T07:28:46.01 0.1 undecidable manual P 114 0.5297 50 -0.25 87
IV.MURB.HHZ. 2021-09-19T07:28:46.25 0.6 undecidable manual P 357 0.5333 50 -0.07 45
IV.GAVE.EHZ. 2021-09-19T07:28:45.40 0.3 undecidable manual S 99 0.2482 108 -0.13 71
IV.SACS.HNE. 2021-09-19T07:28:45.98 0.3 undecidable manual P 284 0.4919 50 0.36 64
IV.MML1.EHZ. 2021-09-19T07:28:45.24 0.1 undecidable manual P 38 0.4865 50 -0.29 87
IV.FDMO.HHZ. 2021-09-19T07:28:45.29 0.1 undecidable manual P 51 0.4919 50 -0.34 86
IV.NRCA.HHZ. 2021-09-19T07:28:44.27 0.1 positive manual P 76 0.4191 50 -0.1 92
IV.ARRO.EHZ. 2021-09-19T07:28:44.62 0.3 undecidable manual S 135 0.2131 110 0.34 68
IV.LNSS.HHZ. 2021-09-19T07:28:43.35 0.3 positive manual P 110 0.375 50 -0.26 67
IV.MGAB.HNE. 2021-09-19T07:28:43.28 0.1 undecidable manual P 299 0.3759 50 -0.35 88
IV.CESI.HHZ. 2021-09-19T07:28:43.41 0.1 undecidable manual P 42 0.3723 50 -0.17 92
IV.ASSB.HHZ. 2021-09-19T07:28:42.31 0.1 positive manual P 13 0.3202 50 -0.37 89
IV.GAVE.EHZ. 2021-09-19T07:28:41.05 0.6 undecidable manual P 99 0.2482 108 -0.24 46
IV.CESX.HHZ. 2021-09-19T07:28:41.16 0.3 undecidable manual S 171 0.1232 123 0 74
IV.ARRO.EHZ. 2021-09-19T07:28:40.68 0.6 undecidable manual P 135 0.2131 110 0.11 48
IV.MOMA.HHZ. 2021-09-19T07:28:39.78 0.1 undecidable manual S 5 0.0737 137 0.09 98
IT.GNU.HGZ. 2021-09-19T07:28:39.67 0.1 undecidable manual S 5 0.0737 137 -0.01 100
IV.CESX.HHZ. 2021-09-19T07:28:38.83 0.3 positive manual P 171 0.1232 123 0.06 74
IV.MOMA.HHZ. 2021-09-19T07:28:38.06 1.0 undecidable manual P 5 0.0737 137 0.14 24
IT.GNU.HGZ. 2021-09-19T07:28:38.11 0.1 undecidable manual P 5 0.0737 137 0.19 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:1.9 0.001153606 0.0832 AML other m 2021-09-19T07:28:40.43
IV.MOMA.HNN. ML:1.8 0.0010022029 0.16 AML other m 2021-09-19T07:28:39.88
IV.MOMA.HNE. ML:1.9 0.0012194705 0.1344 AML other m 2021-09-19T07:28:40.53
IV.MOMA.HHE. ML:2 0.001363798 0.1216 AML other m 2021-09-19T07:28:40.53
IV.CESX.HHN. ML:1.5 0.0003214002 0.2816 AML other m 2021-09-19T07:28:42.28
IV.CESX.HHE. ML:1.3 0.00022542375 0.3008 AML other m 2021-09-19T07:28:43.06
IV.ARRO.EHN. ML:1.2 0.000112 0.2 AML other m 2021-09-19T07:28:44.66
IV.ARRO.EHE. ML:1.4 0.0001585 0.18 AML other m 2021-09-19T07:28:46.13
IV.GAVE.EHE. ML:1.6 0.0001949805 0.2432 AML other m 2021-09-19T07:28:46.38
IV.GAVE.EHN. ML:1.4 0.00012522195 0.1408 AML other m 2021-09-19T07:28:46.49
IV.ASSB.HHN. ML:1 4.4396195E-5 0.1856 AML other m 2021-09-19T07:28:49.09
IV.ASSB.HHE. ML:1 4.1620645E-5 0.0768 AML other m 2021-09-19T07:28:49.42
IV.LNSS.HHE. ML:1.3 7.0553235E-5 0.1216 AML other m 2021-09-19T07:28:50.80
IV.LNSS.HHN. ML:1.5 9.6746405E-5 0.1408 AML other m 2021-09-19T07:28:50.95
IV.NRCA.HHN. ML:1.3 5.7E-5 0.14 AML other m 2021-09-19T07:28:51.69
IV.NRCA.HHE. ML:1.3 5.535E-5 0.12 AML other m 2021-09-19T07:28:53.85
IV.FDMO.HHN. ML:0.8 1.66040675E-5 0.1152 AML other m 2021-09-19T07:28:54.94
IV.MML1.EHN. ML:0.9 1.99E-5 0.8 AML other m 2021-09-19T07:28:54.43
IV.MML1.EHE. ML:0.9 2.21E-5 0.68 AML other m 2021-09-19T07:28:55.54
IV.RM33.EHN. ML:1.1 2.459099E-5 0.1792 AML other m 2021-09-19T07:28:55.84
IV.RM33.EHE. ML:1.3 4.7439895E-5 0.1792 AML other m 2021-09-19T07:28:55.72
IV.MURB.HHE. ML:1.7 0.00011235 0.3 AML other m 2021-09-19T07:28:56.77
IV.FDMO.HHE. ML:0.9 2.01E-5 1.22 AML other m 2021-09-19T07:28:57.30
IV.MURB.HHN. ML:1.6 9.115E-5 0.5 AML other m 2021-09-19T07:29:00.08
IV.ATMI.HHN. ML:1.7 7.2772125E-5 0.2368 AML other m 2021-09-19T07:29:02.39
IV.ATMI.HHE. ML:1.7 7.535E-5 0.26 AML other m 2021-09-19T07:29:02.62
IV.CAFI.HHE. ML:0.9 1.24E-5 1.22 AML other m 2021-09-19T07:29:04.94
IV.GAVE.HNE. ML:1.6 0.0001969167 0.2688 AML other m 2021-09-19T07:28:46.37
IV.MURB.HNE. ML:1.8 0.000138640695 0.2752 AML other m 2021-09-19T07:28:58.64
IV.MURB.HNN. ML:1.8 0.000129764307 0.32 AML other m 2021-09-19T07:28:57.85
IV.CSP1.EHE. ML:1.3 3.331806E-5 0.4224 AML other m 2021-09-19T07:29:00.82
IV.CSP1.EHN. ML:1.4 4.3365615E-5 0.1408 AML other m 2021-09-19T07:28:57.47
IV.EL6.EHE. ML:1.2 2.3738885E-5 0.32 AML other m 2021-09-19T07:29:08.26
IV.EL6.EHN. ML:1.2 2.527903E-5 0.416 AML other m 2021-09-19T07:29:06.04
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