Earthquake with magnitude of ML 1.4 on date 11-03-2021 and time 04:01:59 (Italy) in region 4 km S Massa Martana (PG)

A magnitude ML 1.4 earthquake occured in region: 4 km S Massa Martana (PG), on

  • 11-03-2021 03:01:59 (UTC)
  • 11-03-2021 04:01:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7380, 12.5200 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
Massa Martana PG 4 3770 3770
Acquasparta TR 6 4778 8548
Montecastrilli TR 10 5022 13570
Todi PG 11 16851 30421
Avigliano Umbro TR 12 2558 32979
Giano dell'Umbria PG 12 3846 36825
San Gemini TR 14 5018 41843
Castel Ritaldi PG 16 3278 45121
Monte Castello di Vibio PG 18 1567 46688
Spoleto PG 18 38218 84906
Fratta Todina PG 18 1839 86745
Collazzone PG 19 3473 90218
Gualdo Cattaneo PG 19 6155 96373

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Terni (111501 inhabitants)
29 Km SW of Foligno (57155 inhabitants)
43 Km S of Perugia (166134 inhabitants)
49 Km NE of Viterbo (67173 inhabitants)
84 Km N of Guidonia Montecelio (88673 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
89 Km N of Tivoli (56533 inhabitants)
93 Km NE of Civitavecchia (52991 inhabitants)
94 Km N of Roma (2864731 inhabitants)
96 Km SE of Arezzo (99543 inhabitants)
97 Km W of Teramo (54892 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 1.4 2021-03-11
03:01:59
42.7375 12.5197 9 2021-07-12
16:55:02
Bollettino Sismico Italiano INGV 88151991
Reviewed
Rev100
ML 1.4 2021-03-11
03:01:59
42.7362 12.5193 9 2021-03-11
03:48:38
Sala Sismica INGV-Roma 87987451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-11 03:01:59 ± 0.04
Latitude 42.7375 ± 0.0018
Longitude 12.5197 ± 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 88151991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 236
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 70
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
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) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.72845
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 88151991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-15 11:04:19

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 87987451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-11 03:48:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SRES.HHN. 2021-03-11T03:02:16.94 0.3 undecidable manual S 181 55.5 50 0.01 70
IV.FEMA.HNE. 2021-03-11T03:02:15.76 0.6 undecidable manual S 60 49.8168 50 0.36 44
IV.NRCA.HHZ. 2021-03-11T03:02:15.63 0.3 undecidable manual S 77 49.617 50 0.29 67
IV.LNSS.HHZ. 2021-03-11T03:02:14.27 0.3 undecidable manual S 109 45.0216 50 0.15 70
IV.CESI.HHZ. 2021-03-11T03:02:13.72 0.3 undecidable manual S 46 43.1235 50 0.1 71
IV.MGAB.HHZ. 2021-03-11T03:02:12.35 0.3 undecidable manual S 301 38.4282 50 -0.01 73
IV.EL6.EHZ. 2021-03-11T03:02:12.86 0.6 undecidable manual P 36 80.8635 50 -0.44 41
TV.SF14.HHN. 2021-03-11T03:02:12.59 0.1 undecidable manual P 272 73.7706 50 0.38 84
IV.SMA1.EHZ. 2021-03-11T03:02:11.45 0.3 undecidable manual P 100 67.5768 50 0.19 66
IV.CSP1.EHZ. 2021-03-11T03:02:11.25 0.3 undecidable manual P 55 68.1762 50 -0.09 68
IV.BARO.HNZ. 2021-03-11T03:02:11.29 0.6 undecidable manual P 215 66.4779 50 0.21 44
IV.MMO1.EHZ. 2021-03-11T03:02:11.25 0.3 undecidable manual P 74 68.0763 50 -0.09 68
IV.ATVA.EHN. 2021-03-11T03:02:10.55 0.3 undecidable manual P 343 62.9925 50 0 70
IV.GAVE.EHZ. 2021-03-11T03:02:10.06 0.3 undecidable manual S 99 30.9468 106 -0.21 71
IV.RM33.HNE. 2021-03-11T03:02:10.69 0.6 undecidable manual P 114 62.0934 50 0.27 44
IV.ATLO.EHE. 2021-03-11T03:02:10.92 0.6 undecidable manual P 352 64.6908 50 0.1 45
IT.FOPC.HGZ. 2021-03-11T03:02:09.95 0.3 undecidable manual S 30 29.748 106 0.07 73
IV.MC2.EHZ. 2021-03-11T03:02:09.55 0.1 undecidable manual P 70 57.7977 50 -0.2 90
IV.SRES.HHN. 2021-03-11T03:02:09.47 0.1 undecidable manual P 181 55.5 50 0.07 93
IV.MML1.HNE. 2021-03-11T03:02:09.19 0.3 undecidable manual P 41 55.5999 50 -0.22 68
IV.FDMO.HHZ. 2021-03-11T03:02:09.42 0.3 undecidable manual P 54 56.7987 50 -0.18 68
IV.SACS.HHZ. 2021-03-11T03:02:08.35 0.3 undecidable manual P 284 51.2154 50 -0.38 66
IV.ARRO.EHZ. 2021-03-11T03:02:08.66 0.3 undecidable manual S 131 26.6511 108 -0.19 71
IV.FEMA.HNE. 2021-03-11T03:02:08.60 0.1 undecidable manual P 60 49.8168 50 0.08 93
IV.NRCA.HHZ. 2021-03-11T03:02:08.30 0.3 undecidable manual P 77 49.617 50 -0.18 69
IV.ATCC.EHE. 2021-03-11T03:02:08.56 0.1 undecidable manual P 11 50.616 50 -0.08 93
IV.CESI.HHZ. 2021-03-11T03:02:07.36 0.1 undecidable manual P 46 43.1235 50 -0.13 94
IV.LNSS.HHZ. 2021-03-11T03:02:07.65 0.3 undecidable manual P 109 45.0216 50 -0.13 70
IV.MGAB.HHZ. 2021-03-11T03:02:06.59 0.1 undecidable manual P 301 38.4282 50 -0.17 94
IT.FOPC.HGZ. 2021-03-11T03:02:05.41 0.3 undecidable manual P 30 29.748 106 0.08 73
IV.GAVE.EHZ. 2021-03-11T03:02:05.52 0.1 undecidable manual P 99 30.9468 106 -0.04 98
IV.CESX.HHZ. 2021-03-11T03:02:05.09 0.6 undecidable manual S 159 15.3735 120 -0.14 49
IV.ARRO.EHZ. 2021-03-11T03:02:04.89 0.3 undecidable manual P 131 26.6511 108 0.15 72
IT.GNU.HGZ. 2021-03-11T03:02:03.27 0.3 undecidable manual S 29 8.3805 136 -0.05 76
IV.MOMA.HHZ. 2021-03-11T03:02:03.44 0.3 undecidable manual S 29 8.3805 136 0.12 75
IV.CESX.HHZ. 2021-03-11T03:02:02.74 0.3 undecidable manual P 159 15.3735 120 0.09 74
IV.MOMA.HHZ. 2021-03-11T03:02:01.65 0.1 undecidable manual P 29 8.3805 136 0.11 100
IT.GNU.HGZ. 2021-03-11T03:02:01.65 0.1 undecidable manual P 29 8.3805 136 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:1.6 0.0005589999999999999 0.14 AML other m 2021-03-11T03:02:04.65
IV.MOMA.HNN. ML:1.5 0.0005155000000000001 0.14 AML other m 2021-03-11T03:02:04.58
IV.MOMA.HHE. ML:1.8 0.000875 0.18 AML other m 2021-03-11T03:02:04.61
IV.MOMA.HNE. ML:1.8 0.0008494999999999999 0.18 AML other m 2021-03-11T03:02:04.70
IV.CESX.HHN. ML:1.3 0.00018099999999999998 0.22 AML other m 2021-03-11T03:02:07.34
IV.CESX.HHE. ML:1.2 0.000142 1.56 AML other m 2021-03-11T03:02:08.87
IV.GAVE.EHN. ML:1.3 0.00009345000000000001 1.14 AML other m 2021-03-11T03:02:12.10
IV.MGAB.HHE. ML:1.3 0.0000751 0.18 AML other m 2021-03-11T03:02:13.67
IV.GAVE.EHE. ML:1.4 0.00010499999999999999 1.6 AML other m 2021-03-11T03:02:13.92
IV.MGAB.HHN. ML:1.3 0.00008015 0.82 AML other m 2021-03-11T03:02:15.57
IV.CESI.HHN. ML:1.3 0.00006604999999999999 0.48 AML other m 2021-03-11T03:02:15.55
IV.CESI.HHE. ML:1.1 0.00004125 0.16 AML other m 2021-03-11T03:02:15.73
IV.NRCA.HHN. ML:1.6 0.0000967 1 AML other m 2021-03-11T03:02:16.89
IV.NRCA.HHE. ML:1.5 0.00008745 0.12 AML other m 2021-03-11T03:02:17.91
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