Earthquake with magnitude of ML 1.3 on date 29-04-2021 and time 23:41:25 (Italy) in region 3 km E Acquasparta (TR)

A magnitude ML 1.3 earthquake occured in region: 3 km E Acquasparta (TR), on

  • 29-04-2021 21:41:25 (UTC)
  • 29-04-2021 23:41:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.683, 12.58 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 3 4778 4778
San Gemini TR 8 5018 9796
Montecastrilli TR 8 5022 14818
Massa Martana PG 11 3770 18588
Avigliano Umbro TR 13 2558 21146
Spoleto PG 14 38218 59364
Terni TR 15 111501 170865
Giano dell'Umbria PG 17 3846 174711
Castel Ritaldi PG 17 3278 177989
Todi PG 18 16851 194840
Montefranco TR 18 1276 196116
Ferentillo TR 19 1913 198029
Narni TR 19 19785 217814
Arrone TR 19 2763 220577
Amelia TR 19 11897 232474

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km NW of Terni (111501 inhabitants)
32 Km SW of Foligno (57155 inhabitants)
49 Km NE of Viterbo (67173 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
77 Km W of L'Aquila (69753 inhabitants)
77 Km N of Guidonia Montecelio (88673 inhabitants)
82 Km N of Tivoli (56533 inhabitants)
88 Km N of Roma (2864731 inhabitants)
92 Km W of Teramo (54892 inhabitants)
92 Km NE of Civitavecchia (52991 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.3 2021-04-29
21:41:25
42.683 12.5803 9 2021-07-12
16:55:16
Bollettino Sismico Italiano INGV 91662381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-29 21:41:25 ± 0.1
Latitude 42.6830 ± 0.0045
Longitude 12.5803 ± 0.0098
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91662381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 850
Semi-minor axis of confidence ellipse (meter) 335
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 850
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.58816
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 91662381
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-21 15:43:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-04-29T21:41:46.51 0.6 undecidable manual S 68 0.5882 50 0.91 35
IV.ATCC.EHE. 2021-04-29T21:41:43.62 0.6 undecidable manual S 5 0.5036 50 0.53 41
IV.SRES.HHN. 2021-04-29T21:41:42.45 0.6 undecidable manual S 187 0.4488 50 0.99 34
IV.ASSB.HHZ. 2021-04-29T21:41:39.06 0.6 undecidable manual S 9 0.3642 50 0.12 47
IV.LNSS.HNZ. 2021-04-29T21:41:38.32 0.6 undecidable manual S 103 0.3471 50 -0.14 47
IV.MMO1.EHZ. 2021-04-29T21:41:36.81 0.3 undecidable manual P 68 0.5882 50 -0.14 66
IV.FDMO.HHZ. 2021-04-29T21:41:35.44 0.3 undecidable manual P 46 0.5126 50 -0.22 66
IV.GAVE.HNZ. 2021-04-29T21:41:35.25 0.6 undecidable manual S 88 0.2311 109 0.73 40
IV.ATCC.EHE. 2021-04-29T21:41:35.59 0.6 undecidable manual P 5 0.5036 50 0.09 46
IV.MML1.HNE. 2021-04-29T21:41:35.48 0.6 undecidable manual P 34 0.5171 50 -0.25 44
IV.SRES.HHN. 2021-04-29T21:41:34.48 0.3 undecidable manual P 187 0.4488 50 -0.09 69
IV.CESI.HHE. 2021-04-29T21:41:33.36 0.3 undecidable manual P 36 0.4002 50 -0.37 66
IV.NRCA.HHZ. 2021-04-29T21:41:33.73 0.3 undecidable manual P 69 0.42 50 -0.34 66
IV.ASSB.HHZ. 2021-04-29T21:41:33.05 0.1 undecidable manual P 9 0.3642 50 -0.07 94
IV.LNSS.HNZ. 2021-04-29T21:41:32.47 0.1 undecidable manual P 103 0.3471 50 -0.36 89
IV.MOMA.HHZ. 2021-04-29T21:41:30.66 0.6 undecidable manual S 356 0.1214 123 -0.02 50
IT.GNU.HGZ. 2021-04-29T21:41:30.79 0.6 undecidable manual S 356 0.1205 123 0.11 49
IV.GAVE.HNZ. 2021-04-29T21:41:30.38 0.3 undecidable manual P 88 0.2311 109 -0.17 71
IV.ARRO.EHZ. 2021-04-29T21:41:29.49 0.3 undecidable manual P 127 0.1709 114 0.17 72
IV.CESX.HHZ. 2021-04-29T21:41:29.00 0.6 undecidable manual S 176 0.0746 136 -0.28 48
IT.GNU.HGZ. 2021-04-29T21:41:28.51 0.3 undecidable manual P 356 0.1205 123 0.17 73
IV.MOMA.HHZ. 2021-04-29T21:41:28.34 0.1 undecidable manual P 356 0.1214 123 0 100
IV.CESX.HHZ. 2021-04-29T21:41:27.62 0.1 undecidable manual P 176 0.0746 136 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHE. ML:1.6 0.0006815 1 AML other m 2021-04-29T21:41:31.75
IV.MOMA.HHN. ML:1.5 0.0003425 1.34 AML other m 2021-04-29T21:41:31.29
IV.MOMA.HHE. ML:1.4 0.000303 1.2 AML other m 2021-04-29T21:41:32.14
IV.CESX.HHN. ML:1.6 0.0006375 0.76 AML other m 2021-04-29T21:41:32.54
IV.MOMA.HNN. ML:1.4 0.000311 0.34 AML other m 2021-04-29T21:41:32.28
IV.MOMA.HNE. ML:1.5 0.0003635 0.6 AML other m 2021-04-29T21:41:34.43
IV.ARRO.EHE. ML:1.2 0.000116 0.82 AML other m 2021-04-29T21:41:35.12
IV.ARRO.EHN. ML:1.1 0.000109 0.72 AML other m 2021-04-29T21:41:35.26
IV.ASSB.HHE. ML:0.9 2.685E-5 0.86 AML other m 2021-04-29T21:41:41.90
IV.ASSB.HHN. ML:0.8 2.21E-5 0.8 AML other m 2021-04-29T21:41:44.59
IV.FDMO.HHN. ML:0.8 1.35E-5 0.28 AML other m 2021-04-29T21:41:45.98
IV.FDMO.HHE. ML:0.8 1.51E-5 0.96 AML other m 2021-04-29T21:41:48.94
IV.CPGN.EHN. ML:2.6 0.000297 0.44 AML other m 2021-04-29T21:42:14.60
IV.CPGN.EHE. ML:2.3 0.00013655 1.48 AML other m 2021-04-29T21:42:15.76
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