Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 30-03-2021 and time 05:45:20 (Italy) in region 6 km NW Massa Martana (PG)

A magnitude ML 1.4 earthquake occured in region: 6 km NW Massa Martana (PG), on

  • 30-03-2021 03:45:20 (UTC)
  • 30-03-2021 05:45:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8210, 12.4940 at 8 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.

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 6 3770 3770
Giano dell'Umbria PG 7 3846 7616
Todi PG 8 16851 24467
Collazzone PG 9 3473 27940
Fratta Todina PG 11 1839 29779
Gualdo Cattaneo PG 11 6155 35934
Monte Castello di Vibio PG 12 1567 37501
Castel Ritaldi PG 15 3278 40779
Acquasparta TR 15 4778 45557
Montefalco PG 15 5679 51236
Bevagna PG 16 5081 56317
Marsciano PG 16 18902 75219
Montecastrilli TR 19 5022 80241
Deruta PG 19 9669 89910
Avigliano Umbro TR 19 2558 92468
San Venanzo TR 19 2218 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)
55 Km NE of Viterbo (67173 inhabitants)
87 Km SE of Arezzo (99543 inhabitants)
91 Km NW of L'Aquila (69753 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
99 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
Reviewed
Rev100 		ML 1.4 2021-03-30
03:45:20		 42.8208 12.4937 8 2021-03-30
03:50:50		 Sala Sismica INGV-Roma 88604441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-30 03:45:20 ± 0.07
Latitude 42.8208 ± 0.0045
Longitude 12.4937 ± 0.0049
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88604441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 272
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.67449
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 88604441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-30 03:50:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
ST.DOSS.HHZ. 2021-03-30T03:47:00.69 3.0 undecidable manual Sg 10.97 0
IV.CADC.EHZ. 2021-03-30T03:46:48.50 3.0 undecidable manual Sn 0.33 0
IV.MCRV.HHZ. 2021-03-30T03:46:12.27 3.0 undecidable manual Pg 5.92 0
IV.MSSA.HHZ. 2021-03-30T03:46:00.98 3.0 undecidable manual Pn -1.8 0
IV.BRSN.EHZ. 2021-03-30T03:45:48.73 3.0 negative manual P 1.57 0
IV.VCEL.EHZ. 2021-03-30T03:45:43.41 3.0 negative manual P 1.44 0
IV.MMO1.EHZ. 2021-03-30T03:45:42.20 0.6 undecidable manual S 82 68.2761 50 0.56 40
IV.CSP1.EHZ. 2021-03-30T03:45:41.21 0.6 undecidable manual S 62 65.0904 50 0.42 41
IV.MNTT.EHZ. 2021-03-30T03:45:39.73 3.0 positive manual P 2.19 0
IV.FDMO.HHZ. 2021-03-30T03:45:38.15 0.6 undecidable manual S 63 53.8017 50 0.37 43
IV.SACS.HHZ. 2021-03-30T03:45:36.11 0.3 undecidable manual S 274 47.619 50 -0.01 70
IV.NRCA.HHZ. 2021-03-30T03:45:36.85 0.6 undecidable manual S 88 50.5161 50 -0.05 46
IV.MURB.HHZ. 2021-03-30T03:45:36.61 0.6 undecidable manual S 3 49.1175 50 0.09 46
IV.EL6.EHZ. 2021-03-30T03:45:33.44 0.1 undecidable manual P 41 74.8695 50 -0.22 85
IV.CESI.HHZ. 2021-03-30T03:45:33.74 0.6 undecidable manual S 58 39.1275 50 -0.12 46
IV.MMO1.EHZ. 2021-03-30T03:45:32.40 1.0 positive manual P 82 68.2761 50 -0.24 21
IV.CAFI.HHZ. 2021-03-30T03:45:32.58 0.1 undecidable manual P 323 70.7736 50 -0.44 82
IV.MGAB.HHZ. 2021-03-30T03:45:32.72 0.6 undecidable manual S 288 32.6451 104 0.68 40
IV.CSP1.EHZ. 2021-03-30T03:45:32.14 0.6 negative manual P 62 65.0904 50 -0.01 45
IV.GAVE.EHZ. 2021-03-30T03:45:32.92 0.6 undecidable manual S 113 35.6421 50 0 48
IV.ASSB.HHZ. 2021-03-30T03:45:30.44 0.6 undecidable manual S 29 28.0497 107 -0.05 48
IV.FDMO.HHZ. 2021-03-30T03:45:30.28 1.0 negative manual P 63 53.8017 50 -0.13 23
IV.NRCA.HHZ. 2021-03-30T03:45:29.65 0.6 negative manual P 88 50.5161 50 -0.25 44
IV.CESX.HHZ. 2021-03-30T03:45:29.20 0.6 undecidable manual S 162 24.753 109 -0.21 47
IV.MURB.HHZ. 2021-03-30T03:45:29.78 1.0 positive manual P 3 49.1175 50 0.09 23
IV.SACS.HHZ. 2021-03-30T03:45:29.58 1.0 positive manual P 274 47.619 50 0.12 23
IV.CESI.HHZ. 2021-03-30T03:45:28.06 0.3 negative manual P 58 39.1275 50 -0.09 70
IV.MGAB.HHZ. 2021-03-30T03:45:27.00 0.6 negative manual P 288 32.6451 104 -0.1 47
IV.GAVE.EHZ. 2021-03-30T03:45:27.35 1.0 negative manual P 113 35.6421 50 -0.25 23
IV.CESX.HHZ. 2021-03-30T03:45:26.11 0.6 positive manual P 162 24.753 109 0.53 43
IV.ASSB.HHZ. 2021-03-30T03:45:26.29 0.6 positive manual P 29 28.0497 107 0.09 48
IT.GNU.HGZ. 2021-03-30T03:45:23.93 0.6 undecidable manual S 107 6.4935 142 -0.09 49
IT.GNU.HGZ. 2021-03-30T03:45:22.44 0.1 undecidable manual P 107 6.4935 142 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.5 0.00017649999999999998 0.4 AML other m 2021-03-30T03:45:30.78
IV.ASSB.HHN. ML:1.3 0.00009855 0.2 AML other m 2021-03-30T03:45:30.63
IV.GAVE.EHN. ML:1.5 0.000141 0.28 AML other m 2021-03-30T03:45:33.34
IV.GAVE.EHE. ML:1.6 0.0001445 0.44 AML other m 2021-03-30T03:45:33.35
IV.MGAB.HHN. ML:1.5 0.00013000000000000002 0.36 AML other m 2021-03-30T03:45:33.79
IV.MGAB.HHE. ML:1.4 0.00011949999999999999 1.44 AML other m 2021-03-30T03:45:34.82
IV.CESX.HHN. ML:1.0 0.0000659 0.28 AML other m 2021-03-30T03:45:34.29
IV.CESI.HHN. ML:1.4 0.0000968 0.24 AML other m 2021-03-30T03:45:34.26
IV.CESI.HHE. ML:1.3 0.00006925 0.66 AML other m 2021-03-30T03:45:34.26
IV.CESX.HHE. ML:1.1 0.00006994999999999999 0.36 AML other m 2021-03-30T03:45:35.60
IV.MURB.HHE. ML:1.7 0.00014600000000000003 1.76 AML other m 2021-03-30T03:45:37.05
IV.FDMO.HHN. ML:1.2 0.0000383 0.2 AML other m 2021-03-30T03:45:38.33
IV.NRCA.HHE. ML:1.4 0.00006345000000000001 0.12 AML other m 2021-03-30T03:45:38.44
IV.NRCA.HHN. ML:1.4 0.00006709999999999999 1.18 AML other m 2021-03-30T03:45:39.25
IV.FDMO.HHE. ML:1.3 0.00004685 0.24 AML other m 2021-03-30T03:45:39.98
IV.MURB.HHN. ML:1.7 0.00013925 0.26 AML other m 2021-03-30T03:45:40.75
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