Earthquake with magnitude of ML 1.4 on date 25-01-2021 and time 22:24:04 (Italy) in region 6 km E Montegallo (AP)

A magnitude ML 1.4 earthquake occured in region: 6 km E Montegallo (AP), on

  • 25-01-2021 21:24:04 (UTC)
  • 25-01-2021 22:24:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.83, 13.4 at 24 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montegallo AP 6 523 523
Acquasanta Terme AP 7 2916 3439
Roccafluvione AP 7 2010 5449
Palmiano AP 9 196 5645
Venarotta AP 9 2066 7711
Montemonaco AP 10 604 8315
Arquata del Tronto AP 11 1178 9493
Valle Castellana TE 13 977 10470
Montefortino FM 14 1178 11648
Comunanza AP 14 3166 14814
Ascoli Piceno AP 14 49407 64221
Force AP 17 1354 65575
Amandola FM 17 3629 69204
Montefalcone Appennino FM 18 424 69628
Folignano AP 19 9241 78869
Rotella AP 19 906 79775
Rocca Santa Maria TE 19 537 80312
Accumoli RI 20 667 80979
Smerillo FM 20 365 81344

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Teramo (54892 inhabitants)
53 Km N of L'Aquila (69753 inhabitants)
59 Km E of Foligno (57155 inhabitants)
69 Km E of Terni (111501 inhabitants)
70 Km NW of Montesilvano (53738 inhabitants)
78 Km NW of Pescara (121014 inhabitants)
82 Km NW of Chieti (51815 inhabitants)
88 Km S of Ancona (100861 inhabitants)
88 Km E of Perugia (166134 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.4 2021-01-25
21:24:04
42.83 13.4 24 2021-01-25
21:31:54
Sala Sismica INGV-Roma 86574811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-25 21:24:04 ± 0.12
Latitude 42.83 ± 0.00
Longitude 13.40 ± 0.01
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86574811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 548
Semi-minor axis of confidence ellipse (meter) 260
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.07374
Epicentral distance of station farthest from the epicenter (degree) 0.31027
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 86574811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-25 21:31:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2021-01-25T21:24:17.18 0.6 undecidable manual S 312 0.3103 118 0.28 46
IV.CSP1.EHZ. 2021-01-25T21:24:16.48 0.6 undecidable manual S 331 0.2995 119 -0.14 47
IV.TERO.HHZ. 2021-01-25T21:24:15.44 0.3 undecidable manual S 145 0.2545 124 -0.04 73
IV.NRCA.HHZ. 2021-01-25T21:24:14.64 0.3 undecidable manual S 271 0.2122 130 0.16 72
IV.SMA1.EHZ. 2021-01-25T21:24:14.43 0.3 undecidable manual S 194 0.2059 131 0.09 72
IV.MF5.EHZ. 2021-01-25T21:24:13.67 0.3 undecidable manual S 14 0.1628 138 0.26 71
IV.FDMO.HHZ. 2021-01-25T21:24:11.64 0.3 undecidable manual P 312 0.3103 118 0.04 72
IV.MTRA.EHZ. 2021-01-25T21:24:11.76 0.6 undecidable manual S 184 0.0737 159 -0.27 48
IV.CSP1.EHZ. 2021-01-25T21:24:11.07 0.6 undecidable manual P 331 0.2995 119 -0.36 45
IV.MMO1.EHZ. 2021-01-25T21:24:11.88 0.3 undecidable manual S 321 0.089 155 -0.32 71
IV.SMA1.EHZ. 2021-01-25T21:24:10.27 0.3 undecidable manual P 194 0.2059 131 0.15 72
IV.NRCA.HHZ. 2021-01-25T21:24:10.36 0.1 undecidable manual P 271 0.2122 130 0.15 96
IV.TERO.HHZ. 2021-01-25T21:24:10.69 0.3 undecidable manual P 145 0.2545 124 -0.09 72
IV.MF5.EHZ. 2021-01-25T21:24:09.68 0.3 undecidable manual P 14 0.1628 138 0.09 73
IV.MTRA.EHZ. 2021-01-25T21:24:08.72 0.1 undecidable manual P 184 0.0737 159 -0.07 100
IV.MMO1.EHZ. 2021-01-25T21:24:08.85 0.1 undecidable manual P 321 0.089 155 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:1.6 0.000232 0.16 AML other m 2021-01-25T21:24:11.89
IV.MTRA.EHE. ML:1.5 0.000191 0.2 AML other m 2021-01-25T21:24:11.87
IV.NRCA.HHN. ML:1.7 0.000227 0.42 AML other m 2021-01-25T21:24:14.99
IV.NRCA.HHE. ML:1.4 0.000114286 0.064 AML other m 2021-01-25T21:24:14.99
IV.MF5.EHE. ML:1.4 0.00014578296 1.8432 AML other m 2021-01-25T21:24:13.91
IV.MF5.EHN. ML:1.2 8.2845615E-5 2.6368 AML other m 2021-01-25T21:24:15.10
IV.SMA1.EHE. ML:1.4 0.00012500835 0.1408 AML other m 2021-01-25T21:24:15.03
IV.SMA1.EHN. ML:1.5 0.00013297375 0.1024 AML other m 2021-01-25T21:24:14.97
IV.TERO.HHE. ML:0.8 2.6653929E-5 0.1664 AML other m 2021-01-25T21:24:15.66
IV.TERO.HHN. ML:1.2 5.976453E-5 0.7936 AML other m 2021-01-25T21:24:15.99
IV.CSP1.EHE. ML:1.5 0.00011850735 1.3056 AML other m 2021-01-25T21:24:17.67
IV.FDMO.HHE. ML:1 3.6909065E-5 0.128 AML other m 2021-01-25T21:24:18.01
IV.FDMO.HHN. ML:1.1 4.0958215E-5 0.4736 AML other m 2021-01-25T21:24:17.45
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