Earthquake with magnitude of ML 1.6 on date 26-01-2021 and time 17:19:54 (UTC) in region 4 km SW Roccafluvione (AP)

A magnitude ML 1.6 earthquake occured in region: 4 km SW Roccafluvione (AP), on

  • 26-01-2021 17:19:54 (UTC)
  • 26-01-2021 18:19:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.84, 13.44 at 22 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
Roccafluvione AP 4 2010 2010
Venarotta AP 7 2066 4076
Palmiano AP 8 196 4272
Acquasanta Terme AP 8 2916 7188
Montegallo AP 9 523 7711
Ascoli Piceno AP 12 49407 57118
Montemonaco AP 12 604 57722
Valle Castellana TE 12 977 58699
Arquata del Tronto AP 13 1178 59877
Comunanza AP 14 3166 63043
Montefortino FM 14 1178 64221
Force AP 15 1354 65575
Folignano AP 16 9241 74816
Rotella AP 17 906 75722
Montefalcone Appennino FM 17 424 76146
Amandola FM 18 3629 79775
Rocca Santa Maria TE 18 537 80312
Castignano AP 19 2796 83108
Smerillo FM 19 365 83473
Montedinove AP 20 488 83961
Civitella del Tronto TE 20 5116 89077

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of Teramo (54892 inhabitants)
54 Km N of L'Aquila (69753 inhabitants)
61 Km E of Foligno (57155 inhabitants)
68 Km NW of Montesilvano (53738 inhabitants)
71 Km E of Terni (111501 inhabitants)
76 Km NW of Pescara (121014 inhabitants)
80 Km NW of Chieti (51815 inhabitants)
87 Km S of Ancona (100861 inhabitants)
91 Km E of Perugia (166134 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.6 2021-01-26
17:19:54
42.83 13.44 22 2021-01-26
17:25:21
Sala Sismica INGV-Roma 86607861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-26 17:19:54 ± 0.14
Latitude 42.83 ± 0.00
Longitude 13.44 ± 0.01
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86607861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 615
Semi-minor axis of confidence ellipse (meter) 117
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
Circular confidence region, given by single value of horizontal uncertainty (meter) 620
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 144
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.42448
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 86607861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 17:25:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2021-01-26T17:20:26.99 3.0 undecidable manual S 0.05 0
IV.GAVE.EHZ. 2021-01-26T17:20:10.09 0.6 undecidable manual S 251 0.4245 108 0.37 44
IV.RM33.EHZ. 2021-01-26T17:20:08.48 0.6 undecidable manual S 207 0.3651 111 0.41 44
IV.LNSS.HHZ. 2021-01-26T17:20:08.68 0.3 undecidable manual S 232 0.3732 110 0.38 66
IV.CSP1.EHZ. 2021-01-26T17:20:06.61 0.3 undecidable manual S 326 0.3085 115 0.08 71
IV.SMA1.EHZ. 2021-01-26T17:20:04.12 0.3 undecidable manual S 200 0.2176 126 -0.09 73
IV.NRCA.HHZ. 2021-01-26T17:20:04.49 0.3 undecidable manual S 270 0.2374 123 -0.21 71
IV.MC2.EHZ. 2021-01-26T17:20:03.69 0.3 undecidable manual S 293 0.1979 129 -0.06 73
IV.GAVE.EHZ. 2021-01-26T17:20:03.14 0.1 undecidable manual P 251 0.4245 108 -0.04 93
IV.MF5.EHZ. 2021-01-26T17:20:03.40 0.6 undecidable manual S 6 0.1538 137 0.61 43
IV.LNSS.HHZ. 2021-01-26T17:20:02.27 0.1 undecidable manual P 232 0.3732 110 -0.08 94
IV.RM33.EHZ. 2021-01-26T17:20:02.13 0.1 undecidable manual P 207 0.3651 111 -0.09 94
IV.MMO1.EHZ. 2021-01-26T17:20:01.68 0.3 undecidable manual S 308 0.1043 149 -0.22 72
IV.CSP1.EHZ. 2021-01-26T17:20:01.19 0.1 undecidable manual P 326 0.3085 115 -0.14 94
IV.MTRA.EHZ. 2021-01-26T17:20:01.41 0.3 undecidable manual S 202 0.0836 154 -0.2 73
IV.MNTT.EHZ. 2021-01-26T17:20:01.23 3.0 negative manual P 0.17 0
IV.NRCA.HHZ. 2021-01-26T17:20:00.12 0.1 negative manual P 270 0.2374 123 -0.15 95
IV.TERO.HHZ. 2021-01-26T17:20:00.43 0.6 negative manual P -0.35 0.81
IV.SMA1.EHZ. 2021-01-26T17:20:00.04 0.1 negative manual P 200 0.2176 126 0.05 98
IV.MF5.EHZ. 2021-01-26T17:19:59.37 0.1 undecidable manual P 6 0.1538 137 0.2 96
IV.MC2.EHZ. 2021-01-26T17:19:59.75 0.1 undecidable manual P 293 0.1979 129 0.02 99
IV.MTRA.EHZ. 2021-01-26T17:19:58.45 0.1 undecidable manual P 202 0.0836 154 -0.05 100
IV.MMO1.EHZ. 2021-01-26T17:19:58.54 0.1 undecidable manual P 308 0.1043 149 -0.12 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:1.8 0.0004265 0.14 AML other m 2021-01-26T17:20:01.53
IV.MTRA.EHE. ML:1.6 0.00029230465 0.064 AML other m 2021-01-26T17:20:01.58
IV.SMA1.EHN. ML:1.8 0.00026214395 0.1024 AML other m 2021-01-26T17:20:04.64
IV.SMA1.EHE. ML:1.7 0.0002284119 0.1152 AML other m 2021-01-26T17:20:04.54
IV.NRCA.HHN. ML:2 0.0004213402 0.1408 AML other m 2021-01-26T17:20:04.72
IV.NRCA.HHE. ML:1.7 0.0002029178 0.1408 AML other m 2021-01-26T17:20:06.20
IV.LNSS.HHN. ML:1.6 0.00012915 0.24 AML other m 2021-01-26T17:20:08.82
IV.LNSS.HHE. ML:1.5 9.55E-5 0.14 AML other m 2021-01-26T17:20:09.04
IV.MNTT.EHE. ML:2.5 0.00135 0.16 AML other m 2021-01-26T17:20:17.62
IV.MNTT.EHN. ML:1.9 0.0003306051 0.192 AML other m 2021-01-26T17:20:17.63
IV.MTRA.HNE. ML:1.6 0.00030527835 0.064 AML other m 2021-01-26T17:20:01.57
IV.MTRA.HNN. ML:1.8 0.00043171795 0.128 AML other m 2021-01-26T17:20:01.52
IV.MF5.EHE. ML:1.3 0.00011520905 0.7936 AML other m 2021-01-26T17:20:06.50
IV.MF5.EHN. ML:1.2 8.302766E-5 0.9216 AML other m 2021-01-26T17:20:03.38
IV.NRCA.HNE. ML:1.6 0.00018775135 0.128 AML other m 2021-01-26T17:20:06.20
IV.NRCA.HNN. ML:2 0.00041486545 0.1536 AML other m 2021-01-26T17:20:04.64
IV.TERO.HHE. ML:1 4.727877E-5 0.1536 AML other m 2021-01-26T17:20:05.36
IV.TERO.HHN. ML:1.2 6.5945805E-5 0.064 AML other m 2021-01-26T17:20:05.73
IV.TERO.HNE. ML:1.4 0.00011972248 0.5504 AML other m 2021-01-26T17:20:02.55
IV.TERO.HNN. ML:1.6 0.0001718417 0.7936 AML other m 2021-01-26T17:20:02.60
IV.CSP1.EHE. ML:1.4 8.288192E-5 0.1408 AML other m 2021-01-26T17:20:07.35
IV.CSP1.EHN. ML:1.5 0.00012159739 0.2688 AML other m 2021-01-26T17:20:09.26
IV.RM33.HNE. ML:1.7 0.00015326495 0.8064 AML other m 2021-01-26T17:20:09.47
IV.RM33.HNN. ML:1.7 0.00013936425 1.0496 AML other m 2021-01-26T17:20:17.66
IV.RM33.EHE. ML:1.3 5.628085E-5 0.256 AML other m 2021-01-26T17:20:11.11
IV.RM33.EHN. ML:1.1 3.753837E-5 0.256 AML other m 2021-01-26T17:20:10.35
IV.LNSS.HNE. ML:1.6 0.00013087189 0.1536 AML other m 2021-01-26T17:20:09.04
IV.LNSS.HNN. ML:1.8 0.00017959285 0.8576 AML other m 2021-01-26T17:20:17.93
IV.GAVE.HNE. ML:1.8 0.0001545548 0.576 AML other m 2021-01-26T17:20:14.12
IV.GAVE.HNN. ML:1.8 0.00017834221 0.896 AML other m 2021-01-26T17:20:22.55
IV.GAVE.EHE. ML:1.7 0.0001333112 0.2048 AML other m 2021-01-26T17:20:11.12
IV.GAVE.EHN. ML:1.6 9.3895575E-5 0.2816 AML other m 2021-01-26T17:20:10.35
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download