Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 11-03-2021 and time 22:01:39 (Italy) in region 5 km NW Massa Martana (PG)

A magnitude ML 2.3 earthquake occured in region: 5 km NW Massa Martana (PG), on

  • 11-03-2021 21:01:39 (UTC)
  • 11-03-2021 22:01:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8180, 12.4910 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 5 3770 3770
Giano dell'Umbria PG 7 3846 7616
Todi PG 8 16851 24467
Collazzone PG 10 3473 27940
Fratta Todina PG 11 1839 29779
Monte Castello di Vibio PG 12 1567 31346
Gualdo Cattaneo PG 12 6155 37501
Acquasparta TR 15 4778 42279
Castel Ritaldi PG 15 3278 45557
Montefalco PG 16 5679 51236
Marsciano PG 16 18902 70138
Bevagna PG 16 5081 75219
Montecastrilli TR 19 5022 80241
Avigliano Umbro TR 19 2558 82799
San Venanzo TR 19 2218 85017
Deruta PG 19 9669 94686

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Foligno (57155 inhabitants)
31 Km NW of Terni (111501 inhabitants)
33 Km S of Perugia (166134 inhabitants)
54 Km NE of Viterbo (67173 inhabitants)
88 Km SE of Arezzo (99543 inhabitants)
91 Km NW of L'Aquila (69753 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
99 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 2.3 2021-03-11
21:01:39		 42.8175 12.4907 8 2021-07-12
16:55:03		 Bollettino Sismico Italiano INGV 88426141
Reviewed
Rev100 		ML 2.3 2021-03-11
21:01:39		 42.8198 12.4912 8 2021-03-11
21:12:46		 Sala Sismica INGV-Roma 88012341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-11 21:01:39 ± 0.04
Latitude 42.8175 ± 0.0018
Longitude 12.4907 ± 0.0025
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88426141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 194
Semi-minor axis of confidence ellipse (meter) 137
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 190.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 74
Number of defining phases 72
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.85076
Number of stations at which the event was observed 48
Number of stations from which data was used for origin computation 46
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 52
Type of magnitude ML
Reference to an origin 88426141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-24 09:12:06

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 52
Type of magnitude ML
Reference to an origin 88012341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-11 21:12:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VENL.HNZ. 2021-03-11T21:02:22.73 3.0 negative manual Pn 1.17 0
IV.TREM.HHZ. 2021-03-11T21:02:18.61 3.0 positive manual Pn 1 0
IV.ARVD.HHZ. 2021-03-11T21:02:04.97 0.3 undecidable manual S 26 83.8494 50 0.49 62
IV.SMA1.EHZ. 2021-03-11T21:02:01.46 0.6 undecidable manual S 106 71.8725 50 0.18 45
IV.ATPI.EHZ. 2021-03-11T21:02:01.17 0.6 undecidable manual S 354 70.5738 50 0.23 45
IV.CAFI.HHZ. 2021-03-11T21:02:01.26 0.6 undecidable manual S 323 70.8735 50 0.24 44
IV.MMO1.EHZ. 2021-03-11T21:02:00.70 0.3 undecidable manual S 82 68.5758 50 0.3 66
IV.SRES.HHN. 2021-03-11T21:01:59.27 0.3 undecidable manual S 179 64.3911 50 -0.02 71
IV.CSP1.EHZ. 2021-03-11T21:01:59.97 0.3 undecidable manual S 62 65.49 50 0.4 65
IV.MC2.EHZ. 2021-03-11T21:01:57.85 0.3 undecidable manual S 79 57.6978 50 0.35 67
IV.ATLO.EHE. 2021-03-11T21:01:57.05 0.6 undecidable manual S 353 55.5999 50 0.11 47
IV.ATMI.HHZ. 2021-03-11T21:01:57.96 0.6 undecidable manual S 343 60.0954 50 -0.17 46
IV.FDMO.HHZ. 2021-03-11T21:01:56.23 0.3 undecidable manual S 63 54.2013 50 -0.34 67
IV.MML1.HNE. 2021-03-11T21:01:55.58 0.3 undecidable manual S 50 51.0156 50 -0.13 71
IV.PARC.HHZ. 2021-03-11T21:01:55.62 0.6 undecidable manual P 348 94.4388 50 0.28 42
IV.NRCA.HHZ. 2021-03-11T21:01:55.50 0.3 undecidable manual S 88 50.8158 50 -0.14 71
IV.LNSS.HHZ. 2021-03-11T21:01:55.60 0.3 undecidable manual S 118 50.7159 50 -0.04 72
IV.MNTT.EHZ. 2021-03-11T21:01:55.44 0.6 undecidable manual P 73 93.7395 50 0.2 43
IV.MURB.HHZ. 2021-03-11T21:01:55.36 0.6 undecidable manual S 3 49.5171 50 0.05 48
IV.SSP9.EHZ. 2021-03-11T21:01:54.61 0.6 undecidable manual P 341 88.7445 50 0.14 44
IT.MTCL.HGZ. 2021-03-11T21:01:54.11 0.3 undecidable manual S 64 45.7209 50 -0.19 71
IV.FEMA.HNZ. 2021-03-11T21:01:54.77 0.6 undecidable manual S 70 48.2184 50 -0.18 47
IV.NARO.HHZ. 2021-03-11T21:01:54.62 0.6 undecidable manual P 5 88.3449 50 0.22 43
IV.ATCC.EHZ. 2021-03-11T21:01:53.29 0.3 undecidable manual S 16 42.5241 50 -0.16 71
IV.ARVD.HHZ. 2021-03-11T21:01:53.63 0.3 undecidable manual P 26 83.8494 50 -0.08 67
IV.SAP2.EHZ. 2021-03-11T21:01:53.15 0.6 undecidable manual P 67 79.9644 50 0.03 46
IV.APEC.HHZ. 2021-03-11T21:01:53.83 0.6 undecidable manual P 356 82.3509 50 0.34 43
IV.PIEI.HHZ. 2021-03-11T21:01:53.37 0.3 undecidable manual P 3 79.7646 50 0.29 65
IV.BARO.HNZ. 2021-03-11T21:01:52.08 0.6 undecidable manual P 210 72.6717 50 0.09 46
IV.ATMC.EHE. 2021-03-11T21:01:52.52 0.6 undecidable manual P 341 73.8705 50 0.35 43
IV.SMA1.EHZ. 2021-03-11T21:01:52.01 0.6 undecidable manual P 106 71.8725 50 0.14 45
IV.CESI.HHZ. 2021-03-11T21:01:52.45 0.3 undecidable manual S 58 39.5271 50 -0.19 71
TV.SF04.EHZ. 2021-03-11T21:01:51.51 0.6 undecidable manual P 272 67.5768 50 0.3 44
IV.CAFI.HHZ. 2021-03-11T21:01:51.70 0.3 undecidable manual P 323 70.8735 50 -0.01 70
IV.GAVE.EHZ. 2021-03-11T21:01:51.80 0.3 undecidable manual S 113 35.6421 50 0.18 72
TV.SF03.EHN. 2021-03-11T21:01:51.11 1.0 undecidable manual P 269 65.5899 50 0.22 23
IV.RM33.EHZ. 2021-03-11T21:01:51.10 0.1 undecidable manual P 120 68.2761 50 -0.21 90
IV.ARRO.EHZ. 2021-03-11T21:01:51.57 0.3 undecidable manual S 140 34.6431 50 0.22 71
IV.CSP1.EHZ. 2021-03-11T21:01:51.08 0.6 undecidable manual P 62 65.49 50 0.2 45
IV.MCIV.CHE. 2021-03-11T21:01:51.21 0.1 undecidable manual P 267 66.378 50 0.19 91
IV.MMO1.EHZ. 2021-03-11T21:01:51.31 0.1 undecidable manual P 82 68.5758 50 -0.05 93
IV.ATPI.EHZ. 2021-03-11T21:01:51.80 0.6 undecidable manual P 354 70.5738 50 0.13 46
TV.SF14.HHN. 2021-03-11T21:01:51.45 0.1 undecidable manual P 265 71.6727 50 -0.38 86
IV.MGAB.HHZ. 2021-03-11T21:01:50.65 0.3 undecidable manual S 289 32.5452 104 -0.01 75
IV.TB02.DHZ. 2021-03-11T21:01:50.12 0.1 undecidable manual P 354 61.6938 50 -0.18 92
IV.TB01.DHZ. 2021-03-11T21:01:50.38 0.1 undecidable manual P 356 62.6928 50 -0.08 93
IV.SRES.HHN. 2021-03-11T21:01:50.72 0.6 undecidable manual P 179 64.3911 50 0 47
IV.ATMI.HHZ. 2021-03-11T21:01:50.16 0.6 undecidable manual P 343 60.0954 50 0.11 47
IV.TB03.DHZ. 2021-03-11T21:01:50.63 0.1 undecidable manual P 354 65.0904 50 -0.19 91
IV.SNTG.HHE. 2021-03-11T21:01:50.33 0.1 undecidable manual P 37 60.6948 50 0.18 92
IV.ATFO.HHN. 2021-03-11T21:01:50.22 0.1 undecidable manual P 6 61.2942 50 -0.01 95
IV.FDMO.HHZ. 2021-03-11T21:01:49.01 0.1 undecidable manual P 63 54.2013 50 -0.14 94
IV.MC2.EHZ. 2021-03-11T21:01:49.65 0.3 undecidable manual P 79 57.6978 50 -0.04 71
IV.ATLO.EHE. 2021-03-11T21:01:49.36 0.1 undecidable manual P 353 55.5999 50 0 96
IV.MURB.HHZ. 2021-03-11T21:01:48.65 0.3 undecidable manual P 3 49.5171 50 0.23 69
IV.MML1.HNE. 2021-03-11T21:01:48.43 0.1 undecidable manual P 50 51.0156 50 -0.22 93
IV.NRCA.HHZ. 2021-03-11T21:01:48.36 0.1 undecidable manual P 88 50.8158 50 -0.25 92
IV.FEMA.HNZ. 2021-03-11T21:01:48.23 0.1 undecidable manual P 70 48.2184 50 0.01 97
IV.ATVA.EHE. 2021-03-11T21:01:48.75 0.1 undecidable manual P 342 53.8017 50 -0.33 90
IV.LNSS.HHZ. 2021-03-11T21:01:48.44 0.1 undecidable manual P 118 50.7159 50 -0.17 94
IV.ATCC.EHZ. 2021-03-11T21:01:47.09 0.3 undecidable manual P 16 42.5241 50 -0.25 70
IT.FOPC.HGN. 2021-03-11T21:01:47.80 0.6 undecidable manual S 46 24.1536 109 -0.06 50
IT.MTCL.HGZ. 2021-03-11T21:01:47.77 0.3 undecidable manual P 64 45.7209 50 -0.06 72
IV.CESX.HHZ. 2021-03-11T21:01:47.84 0.3 undecidable manual S 161 24.4533 109 -0.12 74
IV.CESI.HHZ. 2021-03-11T21:01:46.72 0.1 undecidable manual P 58 39.5271 50 -0.16 96
IV.GAVE.EHZ. 2021-03-11T21:01:46.13 0.6 undecidable manual P 113 35.6421 50 -0.16 48
IV.ARRO.EHZ. 2021-03-11T21:01:46.37 0.3 undecidable manual P 140 34.6431 50 0.23 71
IV.MGAB.HHZ. 2021-03-11T21:01:45.61 0.1 undecidable manual P 289 32.5452 104 -0.12 98
IV.CESX.HHZ. 2021-03-11T21:01:44.08 0.3 undecidable manual P 161 24.4533 109 -0.1 75
IT.FOPC.HGN. 2021-03-11T21:01:43.95 0.3 undecidable manual P 46 24.1536 109 -0.17 74
IV.MOMA.HHZ. 2021-03-11T21:01:42.73 0.3 undecidable manual S 103 6.5934 141 0.05 78
IT.GNU.HGZ. 2021-03-11T21:01:42.69 0.3 undecidable manual S 103 6.6933 141 0.01 78
IV.MOMA.HHZ. 2021-03-11T21:01:41.38 0.1 undecidable manual P 103 6.5934 141 0.26 99
IT.GNU.HGZ. 2021-03-11T21:01:41.35 0.1 undecidable manual P 103 6.6933 141 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:2.9 0.01300656 0.2176 AML other m 2021-03-11T21:01:42.84
IV.MOMA.HNN. ML:2.8 0.012297599999999999 0.2304 AML other m 2021-03-11T21:01:42.84
IV.MOMA.HNE. ML:2.7 0.009299313 0.2304 AML other m 2021-03-11T21:01:44.50
IV.MOMA.HHE. ML:2.7 0.009763672 0.2176 AML other m 2021-03-11T21:01:44.50
IV.CESX.HHE. ML:2.0 0.0006275 0.4 AML other m 2021-03-11T21:01:49.54
IV.GAVE.HNN. ML:2.4 0.00108048535 0.0224 AML other m 2021-03-11T21:01:50.85
IV.CESX.HHN. ML:2.0 0.0006622886 1.7056 AML other m 2021-03-11T21:01:51.01
IV.MGAB.HNE. ML:2.2 0.00068912165 0.1664 AML other m 2021-03-11T21:01:52.20
IV.GAVE.EHN. ML:2.4 0.0010435 0.28 AML other m 2021-03-11T21:01:52.30
IV.GAVE.EHE. ML:2.5 0.00130783515 0.2944 AML other m 2021-03-11T21:01:52.48
IV.MGAB.HHE. ML:2.3 0.0009173875500000001 1.6416 AML other m 2021-03-11T21:01:53.90
IV.CESI.HHN. ML:2.6 0.00136 0.22 AML other m 2021-03-11T21:01:53.11
IV.CESI.HNN. ML:2.6 0.0013123865000000002 0.2304 AML other m 2021-03-11T21:01:53.12
IV.MGAB.HHN. ML:2.5 0.001366 0.22 AML other m 2021-03-11T21:01:53.30
IV.MGAB.HNN. ML:2.4 0.001289 0.24 AML other m 2021-03-11T21:01:53.30
IV.CESI.HHE. ML:2.5 0.00108 0.32 AML other m 2021-03-11T21:01:54.62
IV.CESI.HNE. ML:2.4 0.00099310755 0.32 AML other m 2021-03-11T21:01:54.62
IV.ATCC.EHE. ML:2.4 0.0009270000000000001 0.22 AML other m 2021-03-11T21:01:54.69
IV.ARRO.EHE. ML:1.9 0.0003035 0.24 AML other m 2021-03-11T21:01:55.42
IV.ATCC.EHN. ML:2.5 0.0011168295 0.2176 AML other m 2021-03-11T21:01:56.31
IV.FDMO.HHN. ML:2.2 0.00036435725 1.5776 AML other m 2021-03-11T21:01:56.09
IV.ARRO.EHN. ML:1.8 0.0002642293 1.744 AML other m 2021-03-11T21:01:57.05
IV.NRCA.HHE. ML:2.4 0.0006239211 0.1408 AML other m 2021-03-11T21:01:57.60
IV.NRCA.HNE. ML:2.4 0.00059964085 0.1408 AML other m 2021-03-11T21:01:57.60
IV.LNSS.HNN. ML:2.4 0.0007204164500000001 0.2944 AML other m 2021-03-11T21:01:57.49
IV.LNSS.HHN. ML:2.5 0.0007869999999999999 0.3 AML other m 2021-03-11T21:01:57.49
IV.NRCA.HNN. ML:2.3 0.000562274 1.8848 AML other m 2021-03-11T21:01:58.97
IV.NRCA.HHN. ML:2.4 0.0006002794499999999 1.8848 AML other m 2021-03-11T21:01:58.03
IV.FDMO.HHE. ML:2.3 0.0005430000000000001 0.24 AML other m 2021-03-11T21:01:58.71
IV.LNSS.HHE. ML:2.4 0.00063071195 0.4736 AML other m 2021-03-11T21:02:00.65
IV.LNSS.HNE. ML:2.4 0.00064655355 0.4864 AML other m 2021-03-11T21:02:00.65
TV.SF04.EHN. ML:2.4 0.0004804466 1.808 AML other m 2021-03-11T21:02:01.93
TV.SF04.EHE. ML:2.4 0.00040115109999999996 0.2304 AML other m 2021-03-11T21:02:02.41
IV.ATMI.HHN. ML:2.7 0.00102863495 0.2816 AML other m 2021-03-11T21:02:03.26
IV.SMA1.EHE. ML:2.8 0.0009165 0.32 AML other m 2021-03-11T21:02:03.58
IV.SMA1.EHN. ML:2.6 0.0007255 0.4 AML other m 2021-03-11T21:02:03.67
IV.RM33.HNN. ML:2.2 0.00024316265 0.4992 AML other m 2021-03-11T21:02:04.51
IV.ATMI.HHE. ML:2.8 0.0013 0.3 AML other m 2021-03-11T21:02:04.65
IV.CAFI.HHE. ML:2.0 0.000167 0.4 AML other m 2021-03-11T21:02:05.20
IV.CAFI.HNE. ML:2.0 0.00018283565 0.2432 AML other m 2021-03-11T21:02:05.21
IV.CAFI.HHN. ML:1.8 0.000104565185 0.3456 AML other m 2021-03-11T21:02:06.42
IV.RM33.EHN. ML:2.1 0.00022140055 0.3584 AML other m 2021-03-11T21:02:06.48
IV.PIEI.HHE. ML:2.1 0.0001687572 0.384 AML other m 2021-03-11T21:02:07.46
IV.PIEI.HHN. ML:2.2 0.00023899999999999998 0.3 AML other m 2021-03-11T21:02:08.48
IV.NARO.HHN. ML:1.8 0.00008155 0.5 AML other m 2021-03-11T21:02:08.66
IV.APEC.HHN. ML:2.4 0.000296 0.38 AML other m 2021-03-11T21:02:09.32
IV.RM33.HNE. ML:2.2 0.00028027905 0.3456 AML other m 2021-03-11T21:02:09.98
IV.RM33.EHE. ML:2.2 0.00027 0.32 AML other m 2021-03-11T21:02:09.82
IV.NARO.HHE. ML:1.9 0.000090033295 1.68 AML other m 2021-03-11T21:02:10.05
IV.PARC.HHE. ML:2.3 0.000213 0.42 AML other m 2021-03-11T21:02:10.96
IV.APEC.HHE. ML:2.2 0.00020355194999999997 1.296 AML other m 2021-03-11T21:02:11.85
IV.PARC.HHN. ML:2.3 0.00022950000000000002 0.6 AML other m 2021-03-11T21:02:11.46
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