Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 29-03-2021 and time 16:24:15 (UTC) in region 3 km E Massa Martana (PG)

A magnitude ML 2.1 earthquake occured in region: 3 km E Massa Martana (PG), on

  • 29-03-2021 16:24:15 (UTC)
  • 29-03-2021 18:24:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7880, 12.5560 at 8 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Massa Martana PG 3 3770 3770
Giano dell'Umbria PG 6 3846 7616
Castel Ritaldi PG 10 3278 10894
Acquasparta TR 11 4778 15672
Todi PG 12 16851 32523
Gualdo Cattaneo PG 14 6155 38678
Montefalco PG 14 5679 44357
Collazzone PG 15 3473 47830
Spoleto PG 16 38218 86048
Montecastrilli TR 16 5022 91070
Bevagna PG 17 5081 96151
Fratta Todina PG 17 1839 97990
Monte Castello di Vibio PG 18 1567 99557
Avigliano Umbro TR 18 2558 102115
Campello sul Clitunno PG 18 2442 104557
Trevi PG 19 8469 113026
San Gemini TR 19 5018 118044

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of Foligno (57155 inhabitants)
26 Km N of Terni (111501 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
55 Km NE of Viterbo (67173 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
89 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km SE of Arezzo (99543 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
95 Km W of Teramo (54892 inhabitants)
99 Km NE of Civitavecchia (52991 inhabitants)
100 Km N of Roma (2864731 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 2.1 2021-03-29
16:24:15		 42.7882 12.5562 9 2021-07-12
16:55:15		 Bollettino Sismico Italiano INGV 91319831
Reviewed
Rev100 		ML 2.0 2021-03-29
16:24:16		 42.79 12.5518 8 2021-03-29
16:34:35		 Sala Sismica INGV-Roma 88591071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-29 16:24:15 ± 0.04
Latitude 42.7882 ± 0.0018
Longitude 12.5562 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91319831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 285
Semi-minor axis of confidence ellipse (meter) 199
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.65561
Number of stations at which the event was observed 43
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 27
Type of magnitude ML
Reference to an origin 88591071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-29 16:34:35

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 91319831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-15 09:35:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIZZ.HHZ. 2021-03-29T16:25:37.93 3.0 negative manual Pg 9.43 0
IV.ESCV.HHZ. 2021-03-29T16:25:36.60 3.0 negative manual Pn 2.33 0
IV.PTRJ.HNZ. 2021-03-29T16:25:30.12 3.0 undecidable manual Sn -9.99 0
IV.LAV9.HHZ. 2021-03-29T16:25:26.09 3.0 undecidable manual Sg 11.59 0
IV.TDS.HHZ. 2021-03-29T16:25:22.06 3.0 negative manual Pn -0.37 0
IV.MIDA.HHZ. 2021-03-29T16:25:19.15 3.0 undecidable manual Sn -9.99 0
IV.DGI.HHZ. 2021-03-29T16:25:13.90 3.0 undecidable manual Sn -9.99 0
IV.CERT.HHZ. 2021-03-29T16:25:13.63 3.0 undecidable manual Sg 0.94 0
IV.MGR.HHZ. 2021-03-29T16:25:06.83 3.0 undecidable manual Pn -5.12 0
OT.OT14.EHZ. 2021-03-29T16:25:06.65 3.0 negative manual Pg 7.07 0
IV.NRCA.HNZ. 2021-03-29T16:24:31.22 0.6 undecidable manual S 83 45.7209 50 0 48
IV.LNSS.HHZ. 2021-03-29T16:24:30.88 0.3 undecidable manual S 117 44.5221 50 -0.02 72
IV.FEMA.HNZ. 2021-03-29T16:24:30.83 0.6 undecidable manual S 64 44.5221 50 -0.08 47
IV.ZONE.HHZ. 2021-03-29T16:24:29.03 3.0 undecidable manual Sn -2.11 0
IV.MGAB.HHZ. 2021-03-29T16:24:29.53 0.3 undecidable manual S 291 38.628 50 0.19 70
IV.BARO.HNZ. 2021-03-29T16:24:28.71 0.1 undecidable manual P 215 72.7716 50 -0.24 87
IV.MTRA.HNZ. 2021-03-29T16:24:28.21 0.6 undecidable manual P 93 68.4759 50 -0.09 45
IV.CESI.HHZ. 2021-03-29T16:24:28.87 0.3 undecidable manual S 50 37.1295 50 -0.07 72
IV.SMA1.EHZ. 2021-03-29T16:24:28.30 0.1 undecidable manual P 105 65.8896 50 0.41 85
IV.RM33.EHZ. 2021-03-29T16:24:27.18 0.6 undecidable manual P 120 61.9935 50 -0.11 46
IV.CSP1.EHZ. 2021-03-29T16:24:27.50 0.1 undecidable manual P 57 62.493 50 0.13 91
IV.MMO1.HNZ. 2021-03-29T16:24:27.59 0.6 undecidable manual P 79 63.8916 50 0.01 46
IV.T1299.HNZ. 2021-03-29T16:24:27.38 0.6 undecidable manual P 106 61.5939 50 0.15 45
IV.ATMI.HHZ. 2021-03-29T16:24:27.54 0.6 undecidable manual P 339 64.8906 50 -0.2 45
IV.MURB.HHZ. 2021-03-29T16:24:26.00 0.1 undecidable manual P 357 52.7028 50 0.14 92
IV.ASSB.HHZ. 2021-03-29T16:24:26.54 0.3 undecidable manual S 16 29.4483 106 -0.07 73
IV.ATVA.EHZ. 2021-03-29T16:24:26.61 0.6 undecidable manual P 338 58.6968 50 -0.17 45
IV.ARRO.EHZ. 2021-03-29T16:24:26.32 0.3 undecidable manual S 144 28.749 106 -0.08 73
IV.MC2.EHZ. 2021-03-29T16:24:26.33 0.1 undecidable manual P 75 53.3022 50 0.38 88
IV.ATLO.EHZ. 2021-03-29T16:24:26.73 0.6 undecidable manual P 348 59.6958 50 -0.2 45
IV.GAVE.EHZ. 2021-03-29T16:24:26.48 0.3 undecidable manual S 111 29.5482 106 -0.16 72
IV.MML1.EHZ. 2021-03-29T16:24:25.20 1.0 undecidable manual P 43 49.4172 50 -0.15 23
IV.FDMO.HHZ. 2021-03-29T16:24:25.62 0.1 undecidable manual P 57 51.2154 50 -0.01 95
IV.FEMA.HNZ. 2021-03-29T16:24:24.36 0.6 undecidable manual P 64 44.5221 50 -0.24 46
IV.LNSS.HHZ. 2021-03-29T16:24:24.48 0.1 undecidable manual P 117 44.5221 50 -0.11 94
IV.ATCC.EHZ. 2021-03-29T16:24:24.69 0.1 undecidable manual P 9 44.5221 50 0.09 95
IV.NRCA.HNZ. 2021-03-29T16:24:24.49 0.3 undecidable manual P 83 45.7209 50 -0.29 68
IV.CESI.HHZ. 2021-03-29T16:24:23.46 0.1 undecidable manual P 50 37.1295 50 0 98
IV.MGAB.HHZ. 2021-03-29T16:24:23.52 0.1 undecidable manual P 291 38.628 50 -0.17 94
IV.CESX.HHZ. 2021-03-29T16:24:23.46 0.3 undecidable manual S 173 20.0688 113 -0.08 74
IV.GAVE.EHZ. 2021-03-29T16:24:22.01 0.1 undecidable manual P 111 29.5482 106 -0.12 97
IV.ASSB.HHZ. 2021-03-29T16:24:22.08 0.1 undecidable manual P 16 29.4483 106 -0.04 98
IV.ARRO.EHZ. 2021-03-29T16:24:22.24 0.1 undecidable manual P 144 28.749 106 0.25 94
IV.CESX.HHZ. 2021-03-29T16:24:20.43 0.1 undecidable manual P 173 20.0688 113 0.08 99
IT.GNU.HGZ. 2021-03-29T16:24:18.89 0.3 undecidable manual S 33 2.0979 166 -0.11 76
IV.MOMA.HNZ. 2021-03-29T16:24:18.88 0.3 undecidable manual S 33 2.0979 166 -0.12 76
IT.GNU.HGZ. 2021-03-29T16:24:17.91 0.1 undecidable manual P 33 2.0979 166 0.19 100
IV.MOMA.HNZ. 2021-03-29T16:24:17.92 0.1 undecidable manual P 33 2.0979 166 0.2 100
IV.ZONE.HHZ. 2021-03-29T16:24:12.04 3.0 negative manual Pn -0.14 0
IV.NDIM.HNZ. 2021-03-29T16:24:12.76 3.0 undecidable manual S -3.79 0
IV.ZEN8.EHZ. 2021-03-29T16:24:03.35 3.0 undecidable manual Pn -8.43 0
GU.GSCL.HHZ. 2021-03-29T16:24:00.93 3.0 undecidable manual S -4.46 0
IV.SARZ.HHZ. 2021-03-29T16:23:57.93 3.0 positive manual Pn -7.06 0
GU.CANO.HHZ. 2021-03-29T16:23:55.48 3.0 undecidable manual Pn -9.99 0
IV.CSNT.HHZ. 2021-03-29T16:23:55.14 3.0 undecidable manual Pn -9.99 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:2.1 0.000689 0.58 AML other m 2021-03-29T16:24:28.43
IV.GAVE.EHN. ML:2.0 0.0004625 0.22 AML other m 2021-03-29T16:24:28.64
IV.ARRO.EHE. ML:1.8 0.0002945 0.18 AML other m 2021-03-29T16:24:28.83
IV.ARRO.EHN. ML:1.8 0.0003185 1.32 AML other m 2021-03-29T16:24:29.81
IV.MGAB.HHE. ML:2.1 0.0005430000000000001 0.38 AML other m 2021-03-29T16:24:30.78
IV.MGAB.HNE. ML:2.2 0.0005589999999999999 0.4 AML other m 2021-03-29T16:24:30.98
IV.MGAB.HHN. ML:2.0 0.00039400000000000004 0.2 AML other m 2021-03-29T16:24:31.65
IV.MGAB.HNN. ML:2.0 0.000343 0.22 AML other m 2021-03-29T16:24:31.76
IV.LNSS.HHN. ML:2.1 0.0004125 0.3 AML other m 2021-03-29T16:24:32.08
IV.LNSS.HHE. ML:2.2 0.0004595 0.16 AML other m 2021-03-29T16:24:32.41
IV.LNSS.HNE. ML:2.2 0.000491 1.46 AML other m 2021-03-29T16:24:33.19
IV.MURB.HHN. ML:2.2 0.00035299999999999996 0.78 AML other m 2021-03-29T16:24:35.64
IV.MURB.HHE. ML:2.3 0.000486 1.76 AML other m 2021-03-29T16:24:35.10
IV.LNSS.HNN. ML:2.1 0.00039549999999999996 0.6 AML other m 2021-03-29T16:24:36.23
IV.CSP1.EHE. ML:2.2 0.0003195 0.42 AML other m 2021-03-29T16:24:36.78
IV.CSP1.EHN. ML:2.0 0.00021 0.46 AML other m 2021-03-29T16:24:37.52
IV.RM33.EHE. ML:1.9 0.0001655 0.3 AML other m 2021-03-29T16:24:37.85
IV.SMA1.EHE. ML:2.3 0.0003355 1.32 AML other m 2021-03-29T16:24:39.82
IV.SMA1.EHN. ML:2.1 0.00023999999999999998 1.44 AML other m 2021-03-29T16:24:39.94
IV.ATMI.HHN. ML:2.2 0.0002735 0.48 AML other m 2021-03-29T16:24:39.45
IV.RM33.EHN. ML:1.8 0.00011899999999999999 0.56 AML other m 2021-03-29T16:24:39.92
IV.ATMI.HHE. ML:2.2 0.00027899999999999995 0.48 AML other m 2021-03-29T16:24:41.10
IV.GAVE.HNE. ML:2.8 0.00288 0.42 AML other m 2021-03-29T16:24:49.07
IV.GAVE.HNN. ML:2.0 0.0004485 1.44 AML other m 2021-03-29T16:25:18.08
IV.MIDA.HHN. ML:2.2 0.000053 1.46 AML other m 2021-03-29T16:25:52.06
IV.MIDA.HHE. ML:2.0 0.0000329 0.66 AML other m 2021-03-29T16:25:56.15
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
Waveforms Seismic signals in miniseed + resp format Download