Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 26-01-2021 and time 18:38:05 (Italy) in region 5 km SW Roccafluvione (AP)

A magnitude ML 1.9 earthquake occured in region: 5 km SW Roccafluvione (AP), on

  • 26-01-2021 17:38:05 (UTC)
  • 26-01-2021 18:38:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8310, 13.4290 at 23 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.

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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 5 2010 2010
Acquasanta Terme AP 7 2916 4926
Venarotta AP 8 2066 6992
Montegallo AP 8 523 7515
Palmiano AP 8 196 7711
Montemonaco AP 11 604 8315
Valle Castellana TE 12 977 9292
Ascoli Piceno AP 12 49407 58699
Arquata del Tronto AP 13 1178 59877
Comunanza AP 14 3166 63043
Montefortino FM 14 1178 64221
Force AP 16 1354 65575
Folignano AP 17 9241 74816
Rotella AP 18 906 75722
Amandola FM 18 3629 79351
Montefalcone Appennino FM 18 424 79775
Rocca Santa Maria TE 18 537 80312
Smerillo FM 19 365 80677
Castignano AP 20 2796 83473

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Teramo (54892 inhabitants)
53 Km N of L'Aquila (69753 inhabitants)
61 Km E of Foligno (57155 inhabitants)
69 Km NW of Montesilvano (53738 inhabitants)
71 Km E of Terni (111501 inhabitants)
76 Km NW of Pescara (121014 inhabitants)
81 Km NW of Chieti (51815 inhabitants)
88 Km S of Ancona (100861 inhabitants)
90 Km E of Perugia (166134 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 1.9 2021-01-26
17:38:05		 42.8312 13.429 23 2021-07-12
16:54:59		 Bollettino Sismico Italiano INGV 87500221
Reviewed
Rev100 		ML 1.9 2021-01-26
17:38:05		 42.8298 13.4272 22 2021-01-26
17:54:47		 Sala Sismica INGV-Roma 86608371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-26 17:38:05 ± 0.1
Latitude 42.8312 ± 0.0027
Longitude 13.4290 ± 0.0049
Depth (km) 23 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87500221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 353
Semi-minor axis of confidence ellipse (meter) 148
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
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) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.55218
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 86608371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 17:54:47

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 87500221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-26 10:39:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-01-26T17:38:25.31 0.6 undecidable manual S 334 61.2942 104 0.31 44
IV.CESI.HHZ. 2021-01-26T17:38:21.50 0.6 undecidable manual S 295 46.7199 109 0.23 46
IV.GAVE.EHZ. 2021-01-26T17:38:21.40 0.3 undecidable manual S 251 46.2204 109 0.27 68
IV.LNSS.HHZ. 2021-01-26T17:38:20.20 0.3 undecidable manual S 232 40.5261 112 0.48 65
IV.RM33.EHZ. 2021-01-26T17:38:19.90 0.3 undecidable manual S 206 39.8268 113 0.37 67
IV.CAMP.HHZ. 2021-01-26T17:38:18.00 0.3 undecidable manual S 183 32.8449 118 0.16 71
IV.FDMO.HHZ. 2021-01-26T17:38:18.40 0.3 undecidable manual S 310 35.9418 115 -0.19 70
IV.CSP1.EHZ. 2021-01-26T17:38:18.10 0.3 undecidable manual S 328 34.1436 117 -0.07 72
IV.SAP2.EHZ. 2021-01-26T17:38:17.50 0.3 undecidable manual S 355 29.5482 121 0.41 68
IV.TERO.HHZ. 2021-01-26T17:38:16.70 0.3 undecidable manual S 148 27.1506 124 0.15 72
IV.EL6.EHZ. 2021-01-26T17:38:16.78 0.1 negative manual P 334 61.2942 104 -0.1 91
IV.NRCA.HHZ. 2021-01-26T17:38:16.10 0.3 undecidable manual S 271 25.5522 126 -0.1 73
IV.GUMA.HHZ. 2021-01-26T17:38:16.80 0.3 undecidable manual S 344 26.751 124 0.33 70
IV.MC2.EHZ. 2021-01-26T17:38:15.40 0.3 undecidable manual S 295 21.4674 131 0.06 74
IV.SMA1.EHZ. 2021-01-26T17:38:15.60 0.3 undecidable manual S 199 23.5542 128 -0.16 73
IV.CESI.HHZ. 2021-01-26T17:38:14.58 0.3 undecidable manual P 295 46.7199 109 -0.15 70
IV.MF5.EHZ. 2021-01-26T17:38:14.80 0.3 undecidable manual S 8 17.5713 138 0.2 73
IV.GAVE.EHZ. 2021-01-26T17:38:14.59 0.1 negative manual P 251 46.2204 109 -0.06 95
IV.RM33.EHZ. 2021-01-26T17:38:13.69 0.1 negative manual P 206 39.8268 113 -0.03 97
IV.LNSS.HHZ. 2021-01-26T17:38:13.84 0.1 negative manual P 232 40.5261 112 0.01 96
IV.MMO1.EHZ. 2021-01-26T17:38:13.20 0.3 undecidable manual S 312 11.2776 151 -0.41 70
IV.CAMP.HHZ. 2021-01-26T17:38:12.69 0.1 negative manual P 183 32.8449 118 -0.06 97
IV.MTRA.EHZ. 2021-01-26T17:38:12.90 0.3 undecidable manual S 198 8.6802 157 -0.4 71
IV.FDMO.HHZ. 2021-01-26T17:38:12.91 0.1 positive manual P 310 35.9418 115 -0.27 92
IV.SAP2.EHZ. 2021-01-26T17:38:12.49 0.3 undecidable manual P 355 29.5482 121 0.17 72
IV.CSP1.EHZ. 2021-01-26T17:38:12.76 0.1 positive manual P 328 34.1436 117 -0.17 94
IV.GUMA.HHZ. 2021-01-26T17:38:12.01 0.1 positive manual P 344 26.751 124 0.06 98
IV.NRCA.HHZ. 2021-01-26T17:38:11.65 0.1 negative manual P 271 25.5522 126 -0.16 96
IV.MC2.EHZ. 2021-01-26T17:38:11.31 0.1 positive manual P 295 21.4674 131 0.01 100
IV.TERO.HHZ. 2021-01-26T17:38:11.91 0.1 undecidable manual P 148 27.1506 124 -0.09 98
IV.OFFI.HHZ. 2021-01-26T17:38:11.58 0.3 undecidable manual P 61 23.8539 128 -0.01 75
IV.SMA1.EHZ. 2021-01-26T17:38:11.58 0.1 negative manual P 199 23.5542 128 0.03 99
IV.MTRA.EHZ. 2021-01-26T17:38:10.00 0.1 negative manual P 198 8.6802 157 -0.13 100
IV.MF5.EHZ. 2021-01-26T17:38:10.95 0.1 positive manual P 8 17.5713 138 0.07 99
IV.MMO1.EHZ. 2021-01-26T17:38:10.12 0.1 positive manual P 312 11.2776 151 -0.18 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:2.2 0.0010699999999999998 0.14 AML other m 2021-01-26T17:38:13.07
IV.MTRA.HNN. ML:2.2 0.0010500000000000002 0.14 AML other m 2021-01-26T17:38:13.07
IV.MTRA.HNE. ML:2.0 0.00073 1.6 AML other m 2021-01-26T17:38:13.12
IV.MTRA.EHE. ML:2.0 0.0006979999999999999 0.26 AML other m 2021-01-26T17:38:13.79
IV.SMA1.EHN. ML:2.2 0.0007585 0.3 AML other m 2021-01-26T17:38:16.18
IV.SMA1.EHE. ML:2.1 0.000633 0.28 AML other m 2021-01-26T17:38:16.09
IV.NRCA.HHN. ML:2.4 0.0011095000000000002 0.42 AML other m 2021-01-26T17:38:16.26
IV.TERO.HHN. ML:1.7 0.00021349999999999999 0.44 AML other m 2021-01-26T17:38:16.86
IV.TERO.HHE. ML:1.5 0.00014330000000000001 0.82 AML other m 2021-01-26T17:38:16.91
IV.GUMA.HHE. ML:2.2 0.0006745 1.74 AML other m 2021-01-26T17:38:17.09
IV.NRCA.HHE. ML:2.1 0.00059 0.14 AML other m 2021-01-26T17:38:17.75
IV.SAP2.EHN. ML:2.4 0.0011179999999999999 0.14 AML other m 2021-01-26T17:38:17.88
IV.CAMP.HHN. ML:1.8 0.0002255 0.24 AML other m 2021-01-26T17:38:18.36
IV.CAMP.HHE. ML:1.6 0.0001505 0.22 AML other m 2021-01-26T17:38:18.29
IV.CSP1.EHE. ML:2.0 0.0003115 0.74 AML other m 2021-01-26T17:38:18.89
IV.GUMA.HHN. ML:2.0 0.0003815 0.54 AML other m 2021-01-26T17:38:18.82
IV.FDMO.HHN. ML:1.7 0.00014800000000000002 0.34 AML other m 2021-01-26T17:38:18.91
IV.SAP2.EHE. ML:1.7 0.000203 0.54 AML other m 2021-01-26T17:38:18.69
IV.FDMO.HHE. ML:1.7 0.00017099999999999998 0.12 AML other m 2021-01-26T17:38:19.02
IV.CSP1.EHN. ML:2.0 0.00035499999999999996 0.64 AML other m 2021-01-26T17:38:19.10
IV.LNSS.HHN. ML:2.1 0.000356 0.22 AML other m 2021-01-26T17:38:20.37
IV.LNSS.HHE. ML:2.0 0.00028300000000000005 0.14 AML other m 2021-01-26T17:38:20.58
IV.RM33.EHN. ML:1.6 0.000121 1.48 AML other m 2021-01-26T17:38:21.99
IV.GAVE.EHN. ML:2.0 0.00027100000000000003 1.72 AML other m 2021-01-26T17:38:21.89
IV.CESI.HHE. ML:1.5 0.00007714999999999999 1.02 AML other m 2021-01-26T17:38:21.48
IV.CESI.HHN. ML:1.7 0.0001172 0.66 AML other m 2021-01-26T17:38:22.47
IV.RM33.EHE. ML:1.8 0.00017199999999999998 0.26 AML other m 2021-01-26T17:38:22.66
IV.GAVE.EHE. ML:2.2 0.00039749999999999996 0.2 AML other m 2021-01-26T17:38:22.56
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