Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 26-01-2021 and time 09:32:01 (Italy) in region 6 km NW Massa Martana (PG)

A magnitude ML 1.3 earthquake occured in region: 6 km NW Massa Martana (PG), on

  • 26-01-2021 08:32:01 (UTC)
  • 26-01-2021 09:32:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8260, 12.4860 at 9 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 8 3846 7616
Todi PG 8 16851 24467
Collazzone PG 9 3473 27940
Fratta Todina PG 10 1839 29779
Monte Castello di Vibio PG 11 1567 31346
Gualdo Cattaneo PG 11 6155 37501
Marsciano PG 15 18902 56403
Castel Ritaldi PG 15 3278 59681
Montefalco PG 16 5679 65360
Bevagna PG 16 5081 70441
Acquasparta TR 16 4778 75219
Deruta PG 18 9669 84888
San Venanzo TR 19 2218 87106
Montecastrilli TR 20 5022 92128
Avigliano Umbro TR 20 2558 94686

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Foligno (57155 inhabitants)
32 Km NW of Terni (111501 inhabitants)
32 Km S of Perugia (166134 inhabitants)
55 Km NE of Viterbo (67173 inhabitants)
86 Km SE of Arezzo (99543 inhabitants)
92 Km NW of L'Aquila (69753 inhabitants)
94 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 1.3 2021-01-26
08:32:01		 42.8262 12.4858 9 2021-01-26
09:01:08		 Sala Sismica INGV-Roma 86590721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-26 08:32:01 ± 0.06
Latitude 42.8262 ± 0.0036
Longitude 12.4858 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86590721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 373
Semi-minor axis of confidence ellipse (meter) 368
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 195
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
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 22
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.46405
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 86590721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 09:01:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2021-01-26T08:33:37.24 3.0 undecidable manual Sn 2.99 0
OT.OT14.EHZ. 2021-01-26T08:33:30.49 3.0 undecidable manual Sg 5.8 0
IV.MTGR.HHZ. 2021-01-26T08:33:25.69 3.0 undecidable manual Pg 5.24 0
IT.LRNO.HNZ. 2021-01-26T08:33:10.82 3.0 undecidable manual Sg 0.76 0
IV.NDIM.HHZ. 2021-01-26T08:33:07.76 3.0 undecidable manual Sn -0.72 0
IV.TDS.HHZ. 2021-01-26T08:33:05.36 3.0 negative manual Pn -6.01 0
IV.CDRU.HHZ. 2021-01-26T08:32:50.29 3.0 undecidable manual Pn -5.36 0
IV.POFI.HNZ. 2021-01-26T08:32:28.77 3.0 undecidable manual P -3.44 0
IV.NRCA.HHZ. 2021-01-26T08:32:18.84 1.0 undecidable manual S 89 51.1155 50 0.34 29
IV.MML1.EHE. 2021-01-26T08:32:11.40 0.6 undecidable manual P 51 50.7159 50 0 62
IV.LNSS.HNZ. 2021-01-26T08:32:11.28 0.6 undecidable manual P 119 51.5151 50 -0.25 59
IV.ASSB.HHZ. 2021-01-26T08:32:11.84 0.3 undecidable manual S 30 27.8499 107 -0.12 95
IV.NRCA.HHZ. 2021-01-26T08:32:11.37 0.3 undecidable manual P 89 51.1155 50 -0.09 91
IV.SACS.HHZ. 2021-01-26T08:32:10.94 0.6 undecidable manual P 273 46.9197 50 0.12 61
IV.CESI.HHZ. 2021-01-26T08:32:09.67 0.6 undecidable manual P 60 39.3273 50 0.02 63
IV.MGAB.HHZ. 2021-01-26T08:32:08.35 0.6 positive manual P 288 31.8459 105 -0.12 63
IV.CESX.HHZ. 2021-01-26T08:32:07.13 1.0 undecidable manual P 161 25.5522 109 -0.12 32
IV.ASSB.HHZ. 2021-01-26T08:32:07.82 0.3 positive manual P 30 27.8499 107 0.13 94
IV.MOMA.HHZ. 2021-01-26T08:32:05.68 0.3 undecidable manual S 110 7.2927 140 -0.1 99
IT.GNU.HGZ. 2021-01-26T08:32:05.80 0.3 undecidable manual S 110 7.2927 140 0.02 100
IT.GNU.HGZ. 2021-01-26T08:32:04.32 0.3 undecidable manual P 110 7.2927 140 0.2 96
IV.MOMA.HHZ. 2021-01-26T08:32:04.18 1.0 undecidable manual P 110 7.2927 140 0.06 33
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGAB.HHE. ML:1.3 0.00009584999999999999 0.2 AML other m 2021-01-26T08:32:15.17
IV.MGAB.HHN. ML:1.3 0.00008652179 0.1344 AML other m 2021-01-26T08:32:15.60
IV.MGAB.HNE. ML:1.4 0.00011505132000000002 0.5696 AML other m 2021-01-26T08:32:16.68
IV.MGAB.HNN. ML:1.4 0.00011303236 0.5312 AML other m 2021-01-26T08:32:18.68
IV.CESI.HHE. ML:0.9 0.0000291679 0.7168 AML other m 2021-01-26T08:32:14.12
IV.CESI.HHN. ML:1.2 0.000053098905 0.9856 AML other m 2021-01-26T08:32:21.13
IV.CESI.HNE. ML:1.6 0.0001371783 0.7872 AML other m 2021-01-26T08:32:20.33
IV.CESI.HNN. ML:1.7 0.00016871665 0.928 AML other m 2021-01-26T08:32:18.19
IV.SACS.HHE. ML:1.2 0.000037918865000000005 1.4848 AML other m 2021-01-26T08:32:10.58
IV.SACS.HHN. ML:1.1 0.000034022999999999996 1.6192 AML other m 2021-01-26T08:32:32.71
IV.SACS.HNE. ML:1.6 0.0001199323 0.7488 AML other m 2021-01-26T08:32:18.27
IV.SACS.HNN. ML:1.7 0.00014329215000000002 0.736 AML other m 2021-01-26T08:32:19.36
IV.NRCA.HHE. ML:1.1 0.000035887405 0.16 AML other m 2021-01-26T08:32:19.27
IV.NRCA.HHN. ML:1.1 0.00003090303 0.1792 AML other m 2021-01-26T08:32:20.61
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